./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/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 0208408d43bfed3fb8998dae24b66601d82afc9c ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:09:33,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:09:33,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:09:33,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:09:33,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:09:33,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:09:33,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:09:33,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:09:33,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:09:33,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:09:33,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:09:33,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:09:33,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:09:33,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:09:33,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:09:33,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:09:33,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:09:33,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:09:33,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:09:33,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:09:33,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:09:33,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:09:33,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:09:33,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:09:33,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:09:33,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:09:33,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:09:33,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:09:33,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:09:33,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:09:33,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:09:33,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:09:33,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:09:33,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:09:33,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:09:33,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:09:33,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:09:33,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:09:33,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:09:33,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:09:33,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:09:33,197 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:09:33,245 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:09:33,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:09:33,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:09:33,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:09:33,248 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:09:33,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:09:33,249 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:09:33,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:09:33,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:09:33,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:09:33,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:09:33,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:09:33,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:09:33,252 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:09:33,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:09:33,252 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:09:33,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:09:33,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:09:33,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:09:33,253 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:09:33,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:09:33,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:09:33,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:09:33,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:09:33,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:09:33,254 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:09:33,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:09:33,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:09:33,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:09:33,255 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_13f452bd-6fde-4800-af68-d709782d2318/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0208408d43bfed3fb8998dae24b66601d82afc9c [2020-11-28 03:09:33,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:09:33,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:09:33,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:09:33,644 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:09:33,645 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:09:33,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2020-11-28 03:09:33,725 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/bin/uautomizer/data/60c767fd8/003f295804aa471e896d92d564537baf/FLAG1c5ed55c0 [2020-11-28 03:09:34,229 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:09:34,230 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2020-11-28 03:09:34,238 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/bin/uautomizer/data/60c767fd8/003f295804aa471e896d92d564537baf/FLAG1c5ed55c0 [2020-11-28 03:09:34,617 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/bin/uautomizer/data/60c767fd8/003f295804aa471e896d92d564537baf [2020-11-28 03:09:34,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:09:34,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:09:34,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:09:34,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:09:34,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:09:34,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:09:34" (1/1) ... [2020-11-28 03:09:34,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bcc28f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:34, skipping insertion in model container [2020-11-28 03:09:34,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:09:34" (1/1) ... [2020-11-28 03:09:34,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:09:34,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:09:34,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:09:34,914 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:09:34,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:09:34,972 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:09:34,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:34 WrapperNode [2020-11-28 03:09:34,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:09:34,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:09:34,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:09:34,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:09:34,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:34" (1/1) ... [2020-11-28 03:09:34,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:34" (1/1) ... [2020-11-28 03:09:35,008 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:09:35,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:09:35,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:09:35,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:09:35,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:34" (1/1) ... [2020-11-28 03:09:35,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:34" (1/1) ... [2020-11-28 03:09:35,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:34" (1/1) ... [2020-11-28 03:09:35,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:34" (1/1) ... [2020-11-28 03:09:35,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:34" (1/1) ... [2020-11-28 03:09:35,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:34" (1/1) ... [2020-11-28 03:09:35,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:34" (1/1) ... [2020-11-28 03:09:35,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:09:35,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:09:35,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:09:35,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:09:35,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/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 [2020-11-28 03:09:35,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:09:35,105 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-11-28 03:09:35,105 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-11-28 03:09:35,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:09:35,106 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-11-28 03:09:35,106 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-11-28 03:09:35,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:09:35,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:09:35,407 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:09:35,411 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 03:09:35,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:09:35 BoogieIcfgContainer [2020-11-28 03:09:35,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:09:35,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:09:35,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:09:35,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:09:35,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:09:34" (1/3) ... [2020-11-28 03:09:35,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a34f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:09:35, skipping insertion in model container [2020-11-28 03:09:35,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:09:34" (2/3) ... [2020-11-28 03:09:35,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a34f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:09:35, skipping insertion in model container [2020-11-28 03:09:35,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:09:35" (3/3) ... [2020-11-28 03:09:35,448 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2020-11-28 03:09:35,469 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:09:35,475 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:09:35,490 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:09:35,520 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:09:35,521 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:09:35,521 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:09:35,521 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:09:35,521 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:09:35,522 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:09:35,522 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:09:35,522 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:09:35,541 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-11-28 03:09:35,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:09:35,548 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:09:35,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:09:35,549 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:09:35,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:09:35,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2146840844, now seen corresponding path program 1 times [2020-11-28 03:09:35,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:09:35,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552283659] [2020-11-28 03:09:35,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:09:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:35,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:09:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:09:35,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552283659] [2020-11-28 03:09:35,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:09:35,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:09:35,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284397460] [2020-11-28 03:09:35,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:09:35,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:09:35,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:09:35,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:09:35,902 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-11-28 03:09:36,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:09:36,077 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-11-28 03:09:36,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:09:36,079 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-28 03:09:36,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:09:36,090 INFO L225 Difference]: With dead ends: 40 [2020-11-28 03:09:36,090 INFO L226 Difference]: Without dead ends: 27 [2020-11-28 03:09:36,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:09:36,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-28 03:09:36,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-28 03:09:36,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 03:09:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-11-28 03:09:36,140 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2020-11-28 03:09:36,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:09:36,140 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-11-28 03:09:36,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:09:36,140 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-11-28 03:09:36,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:09:36,142 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:09:36,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:09:36,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:09:36,142 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:09:36,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:09:36,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1412337332, now seen corresponding path program 1 times [2020-11-28 03:09:36,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:09:36,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88562176] [2020-11-28 03:09:36,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:09:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:36,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:09:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:09:36,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88562176] [2020-11-28 03:09:36,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:09:36,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:09:36,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385340154] [2020-11-28 03:09:36,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:09:36,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:09:36,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:09:36,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:09:36,270 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-11-28 03:09:36,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:09:36,377 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-11-28 03:09:36,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:09:36,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 03:09:36,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:09:36,381 INFO L225 Difference]: With dead ends: 33 [2020-11-28 03:09:36,382 INFO L226 Difference]: Without dead ends: 29 [2020-11-28 03:09:36,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:09:36,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-28 03:09:36,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-11-28 03:09:36,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 03:09:36,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-11-28 03:09:36,398 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2020-11-28 03:09:36,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:09:36,399 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-11-28 03:09:36,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:09:36,399 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-11-28 03:09:36,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 03:09:36,401 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:09:36,402 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] [2020-11-28 03:09:36,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:09:36,402 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:09:36,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:09:36,403 INFO L82 PathProgramCache]: Analyzing trace with hash -888595213, now seen corresponding path program 1 times [2020-11-28 03:09:36,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:09:36,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004403869] [2020-11-28 03:09:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:09:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:36,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:09:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:36,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:36,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:09:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:09:36,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004403869] [2020-11-28 03:09:36,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066467192] [2020-11-28 03:09:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/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 [2020-11-28 03:09:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:36,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:09:36,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:09:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:09:36,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:09:36,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-11-28 03:09:36,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789535591] [2020-11-28 03:09:36,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 03:09:36,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:09:36,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:09:36,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:09:36,889 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 10 states. [2020-11-28 03:09:37,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:09:37,233 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-11-28 03:09:37,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:09:37,235 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-11-28 03:09:37,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:09:37,237 INFO L225 Difference]: With dead ends: 55 [2020-11-28 03:09:37,237 INFO L226 Difference]: Without dead ends: 31 [2020-11-28 03:09:37,239 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 [2020-11-28 03:09:37,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-28 03:09:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-11-28 03:09:37,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 03:09:37,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-11-28 03:09:37,267 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2020-11-28 03:09:37,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:09:37,268 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-11-28 03:09:37,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 03:09:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-11-28 03:09:37,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 03:09:37,273 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:09:37,274 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] [2020-11-28 03:09:37,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 03:09:37,491 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:09:37,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:09:37,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1502460051, now seen corresponding path program 1 times [2020-11-28 03:09:37,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:09:37,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788049637] [2020-11-28 03:09:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:09:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:37,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:09:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:37,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:37,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:09:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:09:37,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788049637] [2020-11-28 03:09:37,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607436825] [2020-11-28 03:09:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/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 [2020-11-28 03:09:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:37,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:09:37,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:09:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:09:37,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:09:37,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-11-28 03:09:37,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060981575] [2020-11-28 03:09:37,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:09:37,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:09:37,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:09:37,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:09:37,859 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 9 states. [2020-11-28 03:09:38,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:09:38,161 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2020-11-28 03:09:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:09:38,162 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-11-28 03:09:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:09:38,166 INFO L225 Difference]: With dead ends: 51 [2020-11-28 03:09:38,166 INFO L226 Difference]: Without dead ends: 47 [2020-11-28 03:09:38,180 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 [2020-11-28 03:09:38,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-28 03:09:38,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-28 03:09:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 03:09:38,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-11-28 03:09:38,196 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2020-11-28 03:09:38,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:09:38,197 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-11-28 03:09:38,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:09:38,197 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-11-28 03:09:38,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-28 03:09:38,200 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:09:38,200 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] [2020-11-28 03:09:38,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:09:38,415 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:09:38,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:09:38,415 INFO L82 PathProgramCache]: Analyzing trace with hash -801267146, now seen corresponding path program 1 times [2020-11-28 03:09:38,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:09:38,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906822390] [2020-11-28 03:09:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:09:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:38,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:09:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:38,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:38,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:38,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:09:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:38,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-28 03:09:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-28 03:09:38,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906822390] [2020-11-28 03:09:38,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122667971] [2020-11-28 03:09:38,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/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 [2020-11-28 03:09:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:38,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:09:38,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:09:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 03:09:38,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:09:38,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-11-28 03:09:38,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063690574] [2020-11-28 03:09:38,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:09:38,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:09:38,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:09:38,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:09:38,787 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 11 states. [2020-11-28 03:09:39,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:09:39,160 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2020-11-28 03:09:39,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:09:39,161 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-11-28 03:09:39,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:09:39,164 INFO L225 Difference]: With dead ends: 105 [2020-11-28 03:09:39,164 INFO L226 Difference]: Without dead ends: 63 [2020-11-28 03:09:39,166 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 [2020-11-28 03:09:39,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-28 03:09:39,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-28 03:09:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-28 03:09:39,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2020-11-28 03:09:39,184 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2020-11-28 03:09:39,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:09:39,185 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2020-11-28 03:09:39,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:09:39,185 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2020-11-28 03:09:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-28 03:09:39,188 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:09:39,188 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] [2020-11-28 03:09:39,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:09:39,408 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:09:39,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:09:39,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1583643682, now seen corresponding path program 1 times [2020-11-28 03:09:39,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:09:39,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469136695] [2020-11-28 03:09:39,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:09:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:39,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:09:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:39,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:39,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:39,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:09:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:39,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 03:09:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-28 03:09:39,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469136695] [2020-11-28 03:09:39,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258455105] [2020-11-28 03:09:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/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 [2020-11-28 03:09:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:39,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:09:39,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:09:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-28 03:09:39,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:09:39,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-11-28 03:09:39,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581735944] [2020-11-28 03:09:39,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 03:09:39,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:09:39,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 03:09:39,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:09:39,888 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 13 states. [2020-11-28 03:09:40,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:09:40,526 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2020-11-28 03:09:40,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 03:09:40,527 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-11-28 03:09:40,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:09:40,531 INFO L225 Difference]: With dead ends: 177 [2020-11-28 03:09:40,531 INFO L226 Difference]: Without dead ends: 117 [2020-11-28 03:09:40,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-11-28 03:09:40,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-11-28 03:09:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2020-11-28 03:09:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-28 03:09:40,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2020-11-28 03:09:40,585 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2020-11-28 03:09:40,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:09:40,585 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2020-11-28 03:09:40,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 03:09:40,585 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2020-11-28 03:09:40,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-28 03:09:40,593 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:09:40,593 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] [2020-11-28 03:09:40,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:09:40,814 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:09:40,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:09:40,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1063158393, now seen corresponding path program 1 times [2020-11-28 03:09:40,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:09:40,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782419477] [2020-11-28 03:09:40,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:09:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:40,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:09:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:40,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:40,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:40,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:40,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:09:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:40,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 03:09:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:41,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-28 03:09:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-28 03:09:41,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782419477] [2020-11-28 03:09:41,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177936022] [2020-11-28 03:09:41,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/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 [2020-11-28 03:09:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:41,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:09:41,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:09:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-11-28 03:09:41,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:09:41,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-11-28 03:09:41,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339700787] [2020-11-28 03:09:41,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:09:41,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:09:41,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:09:41,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:09:41,246 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand 12 states. [2020-11-28 03:09:41,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:09:41,795 INFO L93 Difference]: Finished difference Result 262 states and 508 transitions. [2020-11-28 03:09:41,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-28 03:09:41,797 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-11-28 03:09:41,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:09:41,802 INFO L225 Difference]: With dead ends: 262 [2020-11-28 03:09:41,802 INFO L226 Difference]: Without dead ends: 162 [2020-11-28 03:09:41,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-11-28 03:09:41,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-28 03:09:41,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 139. [2020-11-28 03:09:41,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-11-28 03:09:41,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 241 transitions. [2020-11-28 03:09:41,891 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 241 transitions. Word has length 51 [2020-11-28 03:09:41,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:09:41,892 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 241 transitions. [2020-11-28 03:09:41,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:09:41,892 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 241 transitions. [2020-11-28 03:09:41,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-28 03:09:41,909 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:09:41,910 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:09:42,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-28 03:09:42,135 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:09:42,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:09:42,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1235830355, now seen corresponding path program 1 times [2020-11-28 03:09:42,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:09:42,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795444558] [2020-11-28 03:09:42,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:09:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:42,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:09:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:42,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:42,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:42,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:42,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:09:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:42,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 03:09:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:42,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-28 03:09:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-28 03:09:42,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795444558] [2020-11-28 03:09:42,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473433327] [2020-11-28 03:09:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/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 [2020-11-28 03:09:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:42,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:09:42,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:09:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-28 03:09:42,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:09:42,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2020-11-28 03:09:42,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033820677] [2020-11-28 03:09:42,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 03:09:42,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:09:42,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 03:09:42,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:09:42,636 INFO L87 Difference]: Start difference. First operand 139 states and 241 transitions. Second operand 13 states. [2020-11-28 03:09:43,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:09:43,226 INFO L93 Difference]: Finished difference Result 301 states and 580 transitions. [2020-11-28 03:09:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 03:09:43,228 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-11-28 03:09:43,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:09:43,231 INFO L225 Difference]: With dead ends: 301 [2020-11-28 03:09:43,231 INFO L226 Difference]: Without dead ends: 98 [2020-11-28 03:09:43,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-11-28 03:09:43,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-28 03:09:43,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2020-11-28 03:09:43,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-28 03:09:43,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 123 transitions. [2020-11-28 03:09:43,266 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 123 transitions. Word has length 52 [2020-11-28 03:09:43,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:09:43,267 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 123 transitions. [2020-11-28 03:09:43,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 03:09:43,267 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 123 transitions. [2020-11-28 03:09:43,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-28 03:09:43,270 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:09:43,270 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:09:43,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:09:43,499 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:09:43,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:09:43,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1494883154, now seen corresponding path program 1 times [2020-11-28 03:09:43,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:09:43,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132447124] [2020-11-28 03:09:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:09:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:43,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:09:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:43,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:43,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:43,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:43,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:09:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:43,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 03:09:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:43,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-28 03:09:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:44,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:44,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:09:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-11-28 03:09:44,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132447124] [2020-11-28 03:09:44,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194648214] [2020-11-28 03:09:44,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/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 [2020-11-28 03:09:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:44,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-28 03:09:44,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:09:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-11-28 03:09:44,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:09:44,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2020-11-28 03:09:44,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618751192] [2020-11-28 03:09:44,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-28 03:09:44,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:09:44,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-28 03:09:44,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-11-28 03:09:44,615 INFO L87 Difference]: Start difference. First operand 80 states and 123 transitions. Second operand 21 states. [2020-11-28 03:09:44,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:09:44,943 INFO L93 Difference]: Finished difference Result 127 states and 217 transitions. [2020-11-28 03:09:44,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-28 03:09:44,943 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-11-28 03:09:44,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:09:44,947 INFO L225 Difference]: With dead ends: 127 [2020-11-28 03:09:44,947 INFO L226 Difference]: Without dead ends: 123 [2020-11-28 03:09:44,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-11-28 03:09:44,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-28 03:09:44,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 90. [2020-11-28 03:09:44,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-28 03:09:44,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 148 transitions. [2020-11-28 03:09:44,979 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 148 transitions. Word has length 65 [2020-11-28 03:09:44,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:09:44,980 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 148 transitions. [2020-11-28 03:09:44,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-28 03:09:44,980 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 148 transitions. [2020-11-28 03:09:44,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-28 03:09:44,984 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:09:44,984 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:09:45,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:09:45,208 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:09:45,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:09:45,208 INFO L82 PathProgramCache]: Analyzing trace with hash 166974902, now seen corresponding path program 2 times [2020-11-28 03:09:45,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:09:45,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361274359] [2020-11-28 03:09:45,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:09:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:45,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:09:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:45,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:45,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:45,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:45,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:09:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:45,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 03:09:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:45,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-28 03:09:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:45,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:45,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:09:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-28 03:09:45,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361274359] [2020-11-28 03:09:45,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943443120] [2020-11-28 03:09:45,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/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 [2020-11-28 03:09:45,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:09:45,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:09:45,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:09:45,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:09:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-11-28 03:09:45,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:09:45,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2020-11-28 03:09:45,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259189471] [2020-11-28 03:09:45,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-28 03:09:45,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:09:45,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-28 03:09:45,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-11-28 03:09:45,796 INFO L87 Difference]: Start difference. First operand 90 states and 148 transitions. Second operand 16 states. [2020-11-28 03:09:46,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:09:46,587 INFO L93 Difference]: Finished difference Result 191 states and 348 transitions. [2020-11-28 03:09:46,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-28 03:09:46,588 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2020-11-28 03:09:46,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:09:46,591 INFO L225 Difference]: With dead ends: 191 [2020-11-28 03:09:46,591 INFO L226 Difference]: Without dead ends: 96 [2020-11-28 03:09:46,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-11-28 03:09:46,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-28 03:09:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2020-11-28 03:09:46,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-28 03:09:46,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 119 transitions. [2020-11-28 03:09:46,619 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 119 transitions. Word has length 66 [2020-11-28 03:09:46,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:09:46,620 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 119 transitions. [2020-11-28 03:09:46,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-28 03:09:46,620 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 119 transitions. [2020-11-28 03:09:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-28 03:09:46,624 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:09:46,624 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:09:46,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-28 03:09:46,851 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:09:46,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:09:46,852 INFO L82 PathProgramCache]: Analyzing trace with hash -129129630, now seen corresponding path program 1 times [2020-11-28 03:09:46,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:09:46,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472395930] [2020-11-28 03:09:46,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:09:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:46,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:09:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:46,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:46,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:46,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:46,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:09:46,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:47,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-28 03:09:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:47,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-11-28 03:09:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:47,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:09:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:47,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:09:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-11-28 03:09:47,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472395930] [2020-11-28 03:09:47,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015880328] [2020-11-28 03:09:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/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 [2020-11-28 03:09:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:09:47,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:09:47,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:09:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-11-28 03:09:47,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:09:47,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2020-11-28 03:09:47,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258567700] [2020-11-28 03:09:47,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:09:47,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:09:47,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:09:47,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:09:47,314 INFO L87 Difference]: Start difference. First operand 87 states and 119 transitions. Second operand 12 states. [2020-11-28 03:09:47,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:09:47,663 INFO L93 Difference]: Finished difference Result 159 states and 234 transitions. [2020-11-28 03:09:47,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:09:47,664 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-11-28 03:09:47,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:09:47,665 INFO L225 Difference]: With dead ends: 159 [2020-11-28 03:09:47,665 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:09:47,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-11-28 03:09:47,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:09:47,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:09:47,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:09:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:09:47,667 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2020-11-28 03:09:47,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:09:47,668 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:09:47,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:09:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:09:47,669 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:09:47,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:09:47,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 03:09:48,552 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 16 [2020-11-28 03:09:48,855 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 23 [2020-11-28 03:09:48,903 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 03:09:48,903 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-28 03:09:48,903 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 03:09:48,903 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-28 03:09:48,903 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-28 03:09:48,903 INFO L270 CegarLoopResult]: At program point L43(lines 37 44) the Hoare annotation is: (<= 4 ULTIMATE.start_main_~x~0) [2020-11-28 03:09:48,903 INFO L274 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-11-28 03:09:48,904 INFO L274 CegarLoopResult]: For program point L40(lines 40 42) no Hoare annotation was computed. [2020-11-28 03:09:48,904 INFO L270 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 4 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 4)) [2020-11-28 03:09:48,904 INFO L274 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-11-28 03:09:48,904 INFO L274 CegarLoopResult]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2020-11-28 03:09:48,904 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-11-28 03:09:48,904 INFO L277 CegarLoopResult]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2020-11-28 03:09:48,904 INFO L270 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (<= 2 |fibo2_#in~n|)) [2020-11-28 03:09:48,904 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-11-28 03:09:48,904 INFO L270 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (or (and (<= |fibo2_#t~ret9| 1) (< 1 fibo2_~n) (<= 1 |fibo2_#t~ret9|) (<= |fibo2_#in~n| 2)) (not (<= |fibo2_#in~n| 3)))) [2020-11-28 03:09:48,904 INFO L274 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-11-28 03:09:48,905 INFO L274 CegarLoopResult]: For program point L25-3(line 25) no Hoare annotation was computed. [2020-11-28 03:09:48,905 INFO L274 CegarLoopResult]: For program point L20(lines 20 26) no Hoare annotation was computed. [2020-11-28 03:09:48,905 INFO L274 CegarLoopResult]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2020-11-28 03:09:48,905 INFO L274 CegarLoopResult]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2020-11-28 03:09:48,905 INFO L277 CegarLoopResult]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2020-11-28 03:09:48,905 INFO L270 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|)) [2020-11-28 03:09:48,905 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-11-28 03:09:48,905 INFO L270 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 4 fibo1_~n) .cse0 (<= |fibo1_#t~ret7| 2) (<= 2 |fibo1_#t~ret7|)) (and (<= |fibo1_#in~n| 3) (<= 1 |fibo1_#t~ret7|) (<= |fibo1_#t~ret7| 1) .cse0) (and (<= 5 |fibo1_#in~n|) .cse0))) (not (<= |fibo1_#in~n| 2))) [2020-11-28 03:09:48,905 INFO L274 CegarLoopResult]: For program point L12(lines 12 16) no Hoare annotation was computed. [2020-11-28 03:09:48,905 INFO L274 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed. [2020-11-28 03:09:48,906 INFO L274 CegarLoopResult]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2020-11-28 03:09:48,906 INFO L274 CegarLoopResult]: For program point L10(lines 10 16) no Hoare annotation was computed. [2020-11-28 03:09:48,906 INFO L274 CegarLoopResult]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2020-11-28 03:09:48,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:09:48 BoogieIcfgContainer [2020-11-28 03:09:48,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:09:48,925 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:09:48,925 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:09:48,925 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:09:48,926 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:09:35" (3/4) ... [2020-11-28 03:09:48,930 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:09:48,936 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2020-11-28 03:09:48,936 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2020-11-28 03:09:48,940 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-28 03:09:48,941 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 03:09:48,941 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:09:48,941 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:09:48,987 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_13f452bd-6fde-4800-af68-d709782d2318/bin/uautomizer/witness.graphml [2020-11-28 03:09:48,987 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:09:48,989 INFO L168 Benchmark]: Toolchain (without parser) took 14366.43 ms. Allocated memory was 111.1 MB in the beginning and 218.1 MB in the end (delta: 107.0 MB). Free memory was 86.2 MB in the beginning and 86.5 MB in the end (delta: -260.6 kB). Peak memory consumption was 106.3 MB. Max. memory is 16.1 GB. [2020-11-28 03:09:48,989 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 83.9 MB. Free memory is still 45.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:09:48,990 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.42 ms. Allocated memory is still 111.1 MB. Free memory was 86.2 MB in the beginning and 89.0 MB in the end (delta: -2.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:09:48,990 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.79 ms. Allocated memory is still 111.1 MB. Free memory was 89.0 MB in the beginning and 87.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:09:48,991 INFO L168 Benchmark]: Boogie Preprocessor took 23.98 ms. Allocated memory is still 111.1 MB. Free memory was 87.6 MB in the beginning and 86.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:09:48,992 INFO L168 Benchmark]: RCFGBuilder took 387.03 ms. Allocated memory is still 111.1 MB. Free memory was 86.6 MB in the beginning and 73.8 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:09:48,992 INFO L168 Benchmark]: TraceAbstraction took 13484.95 ms. Allocated memory was 111.1 MB in the beginning and 218.1 MB in the end (delta: 107.0 MB). Free memory was 73.5 MB in the beginning and 89.6 MB in the end (delta: -16.1 MB). Peak memory consumption was 114.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:09:48,993 INFO L168 Benchmark]: Witness Printer took 62.79 ms. Allocated memory is still 218.1 MB. Free memory was 89.6 MB in the beginning and 86.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:09:48,996 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 83.9 MB. Free memory is still 45.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 350.42 ms. Allocated memory is still 111.1 MB. Free memory was 86.2 MB in the beginning and 89.0 MB in the end (delta: -2.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.79 ms. Allocated memory is still 111.1 MB. Free memory was 89.0 MB in the beginning and 87.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.98 ms. Allocated memory is still 111.1 MB. Free memory was 87.6 MB in the beginning and 86.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 387.03 ms. Allocated memory is still 111.1 MB. Free memory was 86.6 MB in the beginning and 73.8 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13484.95 ms. Allocated memory was 111.1 MB in the beginning and 218.1 MB in the end (delta: 107.0 MB). Free memory was 73.5 MB in the beginning and 89.6 MB in the end (delta: -16.1 MB). Peak memory consumption was 114.4 MB. Max. memory is 16.1 GB. * Witness Printer took 62.79 ms. Allocated memory is still 218.1 MB. Free memory was 89.6 MB in the beginning and 86.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 4 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.3s, OverallIterations: 11, TraceHistogramMax: 5, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 304 SDtfs, 365 SDslu, 1997 SDs, 0 SdLazy, 2275 SolverSat, 308 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 705 GetRequests, 532 SyntacticMatches, 9 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=139occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 103 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 407 PreInvPairs, 497 NumberOfFragments, 88 HoareAnnotationTreeSize, 407 FomulaSimplifications, 1191 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1075 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 861 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 841 ConstructedInterpolants, 0 QuantifiedInterpolants, 95833 SizeOfPredicates, 31 NumberOfNonLiveVariables, 1191 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 549/762 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 correct! Received shutdown request...