./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e6092b6e2bef07c2401a6d2b7c5ee309bc5dbc34 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 11:16:01,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 11:16:01,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 11:16:01,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 11:16:01,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 11:16:01,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 11:16:01,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 11:16:01,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 11:16:01,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 11:16:01,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 11:16:01,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 11:16:01,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 11:16:01,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 11:16:01,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 11:16:01,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 11:16:01,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 11:16:01,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 11:16:01,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 11:16:01,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 11:16:01,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 11:16:01,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 11:16:01,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 11:16:01,240 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 11:16:01,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 11:16:01,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 11:16:01,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 11:16:01,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 11:16:01,243 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 11:16:01,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 11:16:01,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 11:16:01,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 11:16:01,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 11:16:01,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 11:16:01,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 11:16:01,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 11:16:01,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 11:16:01,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 11:16:01,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 11:16:01,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 11:16:01,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 11:16:01,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 11:16:01,248 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 11:16:01,257 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 11:16:01,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 11:16:01,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 11:16:01,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 11:16:01,258 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 11:16:01,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 11:16:01,259 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 11:16:01,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 11:16:01,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 11:16:01,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 11:16:01,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 11:16:01,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 11:16:01,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 11:16:01,260 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 11:16:01,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 11:16:01,260 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 11:16:01,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 11:16:01,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 11:16:01,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 11:16:01,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 11:16:01,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 11:16:01,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 11:16:01,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 11:16:01,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 11:16:01,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 11:16:01,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 11:16:01,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 11:16:01,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 11:16:01,262 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 11:16:01,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_24b9e07e-facd-4c27-b650-e4e725d3c298/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(__VERIFIER_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 -> e6092b6e2bef07c2401a6d2b7c5ee309bc5dbc34 [2019-12-07 11:16:01,361 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 11:16:01,372 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 11:16:01,375 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 11:16:01,376 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 11:16:01,376 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 11:16:01,377 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2019-12-07 11:16:01,418 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/bin/uautomizer/data/d30b627a9/dbe9ef11c9a34085aeb3fccf76f6c03d/FLAGea0b76592 [2019-12-07 11:16:01,893 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 11:16:01,894 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2019-12-07 11:16:01,898 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/bin/uautomizer/data/d30b627a9/dbe9ef11c9a34085aeb3fccf76f6c03d/FLAGea0b76592 [2019-12-07 11:16:01,908 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/bin/uautomizer/data/d30b627a9/dbe9ef11c9a34085aeb3fccf76f6c03d [2019-12-07 11:16:01,910 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 11:16:01,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 11:16:01,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 11:16:01,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 11:16:01,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 11:16:01,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:16:01" (1/1) ... [2019-12-07 11:16:01,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a9c5e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:16:01, skipping insertion in model container [2019-12-07 11:16:01,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 11:16:01" (1/1) ... [2019-12-07 11:16:01,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 11:16:01,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 11:16:02,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:16:02,070 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 11:16:02,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 11:16:02,090 INFO L208 MainTranslator]: Completed translation [2019-12-07 11:16:02,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:16:02 WrapperNode [2019-12-07 11:16:02,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 11:16:02,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 11:16:02,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 11:16:02,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 11:16:02,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:16:02" (1/1) ... [2019-12-07 11:16:02,099 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:16:02" (1/1) ... [2019-12-07 11:16:02,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 11:16:02,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 11:16:02,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 11:16:02,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 11:16:02,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:16:02" (1/1) ... [2019-12-07 11:16:02,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:16:02" (1/1) ... [2019-12-07 11:16:02,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:16:02" (1/1) ... [2019-12-07 11:16:02,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:16:02" (1/1) ... [2019-12-07 11:16:02,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:16:02" (1/1) ... [2019-12-07 11:16:02,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:16:02" (1/1) ... [2019-12-07 11:16:02,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:16:02" (1/1) ... [2019-12-07 11:16:02,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 11:16:02,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 11:16:02,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 11:16:02,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 11:16:02,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:16:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/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 [2019-12-07 11:16:02,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 11:16:02,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 11:16:02,161 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-12-07 11:16:02,162 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-12-07 11:16:02,162 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-12-07 11:16:02,162 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-12-07 11:16:02,267 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 11:16:02,267 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 11:16:02,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:16:02 BoogieIcfgContainer [2019-12-07 11:16:02,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 11:16:02,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 11:16:02,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 11:16:02,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 11:16:02,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 11:16:01" (1/3) ... [2019-12-07 11:16:02,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42dfd8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:16:02, skipping insertion in model container [2019-12-07 11:16:02,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 11:16:02" (2/3) ... [2019-12-07 11:16:02,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42dfd8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 11:16:02, skipping insertion in model container [2019-12-07 11:16:02,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:16:02" (3/3) ... [2019-12-07 11:16:02,273 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2019-12-07 11:16:02,279 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 11:16:02,284 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 11:16:02,291 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 11:16:02,306 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 11:16:02,306 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 11:16:02,306 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 11:16:02,306 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 11:16:02,306 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 11:16:02,306 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 11:16:02,307 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 11:16:02,307 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 11:16:02,318 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-12-07 11:16:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 11:16:02,321 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:16:02,322 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:16:02,322 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:16:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:16:02,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-12-07 11:16:02,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:16:02,331 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624939428] [2019-12-07 11:16:02,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:16:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:16:02,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624939428] [2019-12-07 11:16:02,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:16:02,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 11:16:02,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188466768] [2019-12-07 11:16:02,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 11:16:02,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:16:02,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 11:16:02,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 11:16:02,462 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-12-07 11:16:02,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:16:02,519 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-12-07 11:16:02,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 11:16:02,521 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-07 11:16:02,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:16:02,527 INFO L225 Difference]: With dead ends: 38 [2019-12-07 11:16:02,527 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 11:16:02,529 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 11:16:02,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 11:16:02,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 11:16:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 11:16:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-12-07 11:16:02,557 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-12-07 11:16:02,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:16:02,558 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-12-07 11:16:02,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 11:16:02,558 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-12-07 11:16:02,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 11:16:02,559 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:16:02,559 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:16:02,559 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:16:02,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:16:02,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-12-07 11:16:02,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:16:02,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621306696] [2019-12-07 11:16:02,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:16:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 11:16:02,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621306696] [2019-12-07 11:16:02,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 11:16:02,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 11:16:02,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225576011] [2019-12-07 11:16:02,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 11:16:02,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:16:02,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 11:16:02,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 11:16:02,589 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2019-12-07 11:16:02,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:16:02,628 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-12-07 11:16:02,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 11:16:02,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-12-07 11:16:02,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:16:02,630 INFO L225 Difference]: With dead ends: 32 [2019-12-07 11:16:02,630 INFO L226 Difference]: Without dead ends: 28 [2019-12-07 11:16:02,630 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 11:16:02,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-07 11:16:02,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-12-07 11:16:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 11:16:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-12-07 11:16:02,636 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-12-07 11:16:02,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:16:02,636 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-12-07 11:16:02,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 11:16:02,636 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-12-07 11:16:02,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 11:16:02,637 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:16:02,637 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:16:02,637 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:16:02,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:16:02,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-12-07 11:16:02,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:16:02,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537831891] [2019-12-07 11:16:02,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:16:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:16:02,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537831891] [2019-12-07 11:16:02,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853226810] [2019-12-07 11:16:02,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/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 [2019-12-07 11:16:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:02,743 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 11:16:02,747 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:16:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:16:02,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:16:02,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-12-07 11:16:02,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823449266] [2019-12-07 11:16:02,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 11:16:02,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:16:02,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 11:16:02,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-12-07 11:16:02,787 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 10 states. [2019-12-07 11:16:02,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:16:02,866 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-12-07 11:16:02,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 11:16:02,867 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-12-07 11:16:02,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:16:02,868 INFO L225 Difference]: With dead ends: 59 [2019-12-07 11:16:02,868 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 11:16:02,869 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-12-07 11:16:02,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 11:16:02,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-12-07 11:16:02,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-07 11:16:02,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-12-07 11:16:02,874 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-12-07 11:16:02,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:16:02,875 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-12-07 11:16:02,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 11:16:02,875 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-12-07 11:16:02,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 11:16:02,876 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:16:02,876 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:16:03,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:16:03,077 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:16:03,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:16:03,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-12-07 11:16:03,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:16:03,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583592505] [2019-12-07 11:16:03,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:16:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:16:03,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583592505] [2019-12-07 11:16:03,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040894353] [2019-12-07 11:16:03,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/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 [2019-12-07 11:16:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:03,365 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 11:16:03,366 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:16:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 11:16:03,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:16:03,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-12-07 11:16:03,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668876203] [2019-12-07 11:16:03,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 11:16:03,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:16:03,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 11:16:03,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-12-07 11:16:03,394 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 10 states. [2019-12-07 11:16:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:16:03,507 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-12-07 11:16:03,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 11:16:03,507 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-12-07 11:16:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:16:03,510 INFO L225 Difference]: With dead ends: 55 [2019-12-07 11:16:03,510 INFO L226 Difference]: Without dead ends: 51 [2019-12-07 11:16:03,510 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-12-07 11:16:03,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-07 11:16:03,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-12-07 11:16:03,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-07 11:16:03,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-12-07 11:16:03,519 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-12-07 11:16:03,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:16:03,519 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-12-07 11:16:03,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 11:16:03,519 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-12-07 11:16:03,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-07 11:16:03,520 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:16:03,521 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:16:03,721 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:16:03,722 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:16:03,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:16:03,723 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-12-07 11:16:03,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:16:03,724 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390635082] [2019-12-07 11:16:03,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:16:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 11:16:03,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390635082] [2019-12-07 11:16:03,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841113957] [2019-12-07 11:16:03,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/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 [2019-12-07 11:16:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:03,888 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 11:16:03,890 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:16:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 11:16:03,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:16:03,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-12-07 11:16:03,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166595321] [2019-12-07 11:16:03,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 11:16:03,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:16:03,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 11:16:03,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-12-07 11:16:03,932 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 12 states. [2019-12-07 11:16:04,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:16:04,119 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-12-07 11:16:04,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 11:16:04,120 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-12-07 11:16:04,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:16:04,122 INFO L225 Difference]: With dead ends: 114 [2019-12-07 11:16:04,122 INFO L226 Difference]: Without dead ends: 68 [2019-12-07 11:16:04,124 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-07 11:16:04,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-07 11:16:04,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-12-07 11:16:04,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-07 11:16:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-12-07 11:16:04,138 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-12-07 11:16:04,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:16:04,138 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-12-07 11:16:04,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 11:16:04,138 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-12-07 11:16:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-07 11:16:04,141 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:16:04,141 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:16:04,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:16:04,342 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:16:04,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:16:04,343 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-12-07 11:16:04,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:16:04,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829412933] [2019-12-07 11:16:04,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:16:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-12-07 11:16:04,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829412933] [2019-12-07 11:16:04,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042205291] [2019-12-07 11:16:04,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/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 [2019-12-07 11:16:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:04,462 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 11:16:04,464 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:16:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 11:16:04,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:16:04,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2019-12-07 11:16:04,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960082892] [2019-12-07 11:16:04,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 11:16:04,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:16:04,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 11:16:04,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-12-07 11:16:04,510 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 12 states. [2019-12-07 11:16:04,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:16:04,651 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-12-07 11:16:04,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 11:16:04,651 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-12-07 11:16:04,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:16:04,652 INFO L225 Difference]: With dead ends: 147 [2019-12-07 11:16:04,653 INFO L226 Difference]: Without dead ends: 83 [2019-12-07 11:16:04,654 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-12-07 11:16:04,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-07 11:16:04,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-12-07 11:16:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-07 11:16:04,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-12-07 11:16:04,663 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-12-07 11:16:04,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:16:04,663 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-12-07 11:16:04,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 11:16:04,663 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-12-07 11:16:04,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-07 11:16:04,665 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:16:04,665 INFO L410 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] [2019-12-07 11:16:04,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:16:04,866 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:16:04,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:16:04,867 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-12-07 11:16:04,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:16:04,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548278048] [2019-12-07 11:16:04,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:16:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-12-07 11:16:05,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548278048] [2019-12-07 11:16:05,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229176895] [2019-12-07 11:16:05,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/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 [2019-12-07 11:16:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:05,022 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 11:16:05,024 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:16:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-12-07 11:16:05,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:16:05,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2019-12-07 11:16:05,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959414201] [2019-12-07 11:16:05,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 11:16:05,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:16:05,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 11:16:05,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-12-07 11:16:05,072 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 16 states. [2019-12-07 11:16:05,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:16:05,361 INFO L93 Difference]: Finished difference Result 164 states and 279 transitions. [2019-12-07 11:16:05,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-07 11:16:05,361 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2019-12-07 11:16:05,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:16:05,363 INFO L225 Difference]: With dead ends: 164 [2019-12-07 11:16:05,363 INFO L226 Difference]: Without dead ends: 100 [2019-12-07 11:16:05,364 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2019-12-07 11:16:05,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-07 11:16:05,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2019-12-07 11:16:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-07 11:16:05,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 145 transitions. [2019-12-07 11:16:05,376 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 145 transitions. Word has length 50 [2019-12-07 11:16:05,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:16:05,377 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 145 transitions. [2019-12-07 11:16:05,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 11:16:05,377 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 145 transitions. [2019-12-07 11:16:05,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-12-07 11:16:05,381 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:16:05,381 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:16:05,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:16:05,582 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:16:05,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:16:05,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1917551255, now seen corresponding path program 1 times [2019-12-07 11:16:05,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:16:05,584 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864341261] [2019-12-07 11:16:05,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:16:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 33 proven. 58 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-12-07 11:16:05,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864341261] [2019-12-07 11:16:05,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807187322] [2019-12-07 11:16:05,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/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 [2019-12-07 11:16:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:05,824 INFO L264 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 11:16:05,827 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:16:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 23 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-12-07 11:16:05,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:16:05,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2019-12-07 11:16:05,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542580410] [2019-12-07 11:16:05,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-07 11:16:05,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:16:05,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-07 11:16:05,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2019-12-07 11:16:05,883 INFO L87 Difference]: Start difference. First operand 89 states and 145 transitions. Second operand 17 states. [2019-12-07 11:16:06,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:16:06,186 INFO L93 Difference]: Finished difference Result 222 states and 415 transitions. [2019-12-07 11:16:06,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 11:16:06,186 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2019-12-07 11:16:06,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:16:06,188 INFO L225 Difference]: With dead ends: 222 [2019-12-07 11:16:06,188 INFO L226 Difference]: Without dead ends: 138 [2019-12-07 11:16:06,189 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2019-12-07 11:16:06,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-12-07 11:16:06,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2019-12-07 11:16:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-12-07 11:16:06,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2019-12-07 11:16:06,201 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 91 [2019-12-07 11:16:06,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:16:06,202 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2019-12-07 11:16:06,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-07 11:16:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2019-12-07 11:16:06,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-12-07 11:16:06,203 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:16:06,203 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:16:06,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:16:06,405 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:16:06,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:16:06,406 INFO L82 PathProgramCache]: Analyzing trace with hash -590215841, now seen corresponding path program 2 times [2019-12-07 11:16:06,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:16:06,407 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370301336] [2019-12-07 11:16:06,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:16:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 100 proven. 152 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2019-12-07 11:16:06,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370301336] [2019-12-07 11:16:06,775 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473264660] [2019-12-07 11:16:06,775 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/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 [2019-12-07 11:16:06,817 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 11:16:06,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:16:06,818 INFO L264 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 11:16:06,821 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:16:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 81 proven. 83 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2019-12-07 11:16:06,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:16:06,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 26 [2019-12-07 11:16:06,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564627700] [2019-12-07 11:16:06,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 11:16:06,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:16:06,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 11:16:06,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2019-12-07 11:16:06,923 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 26 states. [2019-12-07 11:16:07,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:16:07,496 INFO L93 Difference]: Finished difference Result 285 states and 569 transitions. [2019-12-07 11:16:07,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-07 11:16:07,497 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 132 [2019-12-07 11:16:07,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:16:07,498 INFO L225 Difference]: With dead ends: 285 [2019-12-07 11:16:07,498 INFO L226 Difference]: Without dead ends: 105 [2019-12-07 11:16:07,500 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2019-12-07 11:16:07,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-12-07 11:16:07,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2019-12-07 11:16:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-07 11:16:07,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2019-12-07 11:16:07,507 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 132 [2019-12-07 11:16:07,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:16:07,508 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2019-12-07 11:16:07,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-07 11:16:07,508 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2019-12-07 11:16:07,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-12-07 11:16:07,509 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:16:07,509 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:16:07,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:16:07,710 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:16:07,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:16:07,710 INFO L82 PathProgramCache]: Analyzing trace with hash 350372983, now seen corresponding path program 3 times [2019-12-07 11:16:07,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:16:07,711 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033665792] [2019-12-07 11:16:07,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:16:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 105 proven. 103 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-12-07 11:16:07,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033665792] [2019-12-07 11:16:07,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893971310] [2019-12-07 11:16:07,943 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/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 [2019-12-07 11:16:07,967 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 11:16:07,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:16:07,968 INFO L264 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 11:16:07,970 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:16:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 139 proven. 18 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-12-07 11:16:08,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:16:08,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 23 [2019-12-07 11:16:08,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494359736] [2019-12-07 11:16:08,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 11:16:08,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:16:08,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 11:16:08,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2019-12-07 11:16:08,022 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 23 states. [2019-12-07 11:16:08,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:16:08,379 INFO L93 Difference]: Finished difference Result 176 states and 247 transitions. [2019-12-07 11:16:08,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-07 11:16:08,379 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2019-12-07 11:16:08,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:16:08,380 INFO L225 Difference]: With dead ends: 176 [2019-12-07 11:16:08,380 INFO L226 Difference]: Without dead ends: 86 [2019-12-07 11:16:08,381 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 11:16:08,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-07 11:16:08,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2019-12-07 11:16:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-07 11:16:08,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2019-12-07 11:16:08,386 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 119 [2019-12-07 11:16:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:16:08,386 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2019-12-07 11:16:08,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 11:16:08,386 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2019-12-07 11:16:08,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-12-07 11:16:08,387 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:16:08,387 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:16:08,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:16:08,588 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:16:08,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:16:08,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1882786525, now seen corresponding path program 4 times [2019-12-07 11:16:08,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:16:08,588 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234444260] [2019-12-07 11:16:08,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:16:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 60 proven. 49 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-12-07 11:16:08,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234444260] [2019-12-07 11:16:08,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113866974] [2019-12-07 11:16:08,750 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/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 [2019-12-07 11:16:08,774 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 11:16:08,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:16:08,775 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 11:16:08,776 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:16:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-12-07 11:16:08,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:16:08,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 19 [2019-12-07 11:16:08,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14646550] [2019-12-07 11:16:08,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 11:16:08,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:16:08,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 11:16:08,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2019-12-07 11:16:08,816 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 19 states. [2019-12-07 11:16:08,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:16:08,994 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2019-12-07 11:16:08,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 11:16:08,994 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2019-12-07 11:16:08,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:16:08,995 INFO L225 Difference]: With dead ends: 103 [2019-12-07 11:16:08,995 INFO L226 Difference]: Without dead ends: 92 [2019-12-07 11:16:08,996 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2019-12-07 11:16:08,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-12-07 11:16:09,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2019-12-07 11:16:09,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-07 11:16:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2019-12-07 11:16:09,001 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 91 [2019-12-07 11:16:09,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:16:09,001 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2019-12-07 11:16:09,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 11:16:09,001 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2019-12-07 11:16:09,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-12-07 11:16:09,003 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:16:09,003 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:16:09,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:16:09,203 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:16:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:16:09,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1335172610, now seen corresponding path program 5 times [2019-12-07 11:16:09,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:16:09,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085724056] [2019-12-07 11:16:09,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:16:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-12-07 11:16:09,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085724056] [2019-12-07 11:16:09,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011884021] [2019-12-07 11:16:09,561 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:16:09,596 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-07 11:16:09,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:16:09,598 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 63 conjunts are in the unsatisfiable core [2019-12-07 11:16:09,600 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:16:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-12-07 11:16:09,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 11:16:09,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 28 [2019-12-07 11:16:09,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178426557] [2019-12-07 11:16:09,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-07 11:16:09,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:16:09,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-07 11:16:09,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2019-12-07 11:16:09,866 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 28 states. [2019-12-07 11:16:10,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:16:10,036 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2019-12-07 11:16:10,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 11:16:10,037 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 105 [2019-12-07 11:16:10,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:16:10,037 INFO L225 Difference]: With dead ends: 100 [2019-12-07 11:16:10,037 INFO L226 Difference]: Without dead ends: 90 [2019-12-07 11:16:10,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 133 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2019-12-07 11:16:10,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-12-07 11:16:10,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-12-07 11:16:10,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-07 11:16:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2019-12-07 11:16:10,042 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 105 [2019-12-07 11:16:10,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:16:10,043 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2019-12-07 11:16:10,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-07 11:16:10,043 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2019-12-07 11:16:10,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-12-07 11:16:10,043 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 11:16:10,044 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 11:16:10,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:16:10,245 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 11:16:10,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 11:16:10,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1449179333, now seen corresponding path program 6 times [2019-12-07 11:16:10,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 11:16:10,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882872297] [2019-12-07 11:16:10,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 11:16:10,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 11:16:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 71 proven. 6 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-12-07 11:16:10,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882872297] [2019-12-07 11:16:10,352 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767790039] [2019-12-07 11:16:10,352 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:16:10,381 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-07 11:16:10,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 11:16:10,382 INFO L264 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 11:16:10,383 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 11:16:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-12-07 11:16:10,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 11:16:10,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2019-12-07 11:16:10,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553049554] [2019-12-07 11:16:10,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 11:16:10,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 11:16:10,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 11:16:10,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-12-07 11:16:10,400 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 6 states. [2019-12-07 11:16:10,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 11:16:10,432 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2019-12-07 11:16:10,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 11:16:10,433 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-12-07 11:16:10,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 11:16:10,433 INFO L225 Difference]: With dead ends: 101 [2019-12-07 11:16:10,433 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 11:16:10,434 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-12-07 11:16:10,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 11:16:10,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 11:16:10,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 11:16:10,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 11:16:10,434 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 104 [2019-12-07 11:16:10,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 11:16:10,434 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 11:16:10,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 11:16:10,434 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 11:16:10,434 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 11:16:10,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 11:16:10,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 11:16:10,942 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 25 [2019-12-07 11:16:11,105 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 22 [2019-12-07 11:16:11,107 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 11:16:11,107 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 11:16:11,107 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 11:16:11,107 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-12-07 11:16:11,108 INFO L242 CegarLoopResult]: At program point L41(lines 35 42) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~x~0) [2019-12-07 11:16:11,108 INFO L246 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2019-12-07 11:16:11,108 INFO L246 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-12-07 11:16:11,108 INFO L242 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 5)) [2019-12-07 11:16:11,108 INFO L246 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-12-07 11:16:11,108 INFO L246 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-12-07 11:16:11,108 INFO L249 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2019-12-07 11:16:11,108 INFO L242 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 2))) [2019-12-07 11:16:11,108 INFO L246 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-12-07 11:16:11,108 INFO L242 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (or (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1)) (<= 4 fibo2_~n)) (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= |fibo2_#in~n| 3) .cse0) (and (<= |fibo2_#t~ret2| 2) .cse0 (<= 2 |fibo2_#t~ret2|)) (and (<= 5 |fibo2_#in~n|) .cse0))) (not (<= |fibo2_#in~n| 2))) [2019-12-07 11:16:11,108 INFO L246 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2019-12-07 11:16:11,108 INFO L246 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2019-12-07 11:16:11,108 INFO L246 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2019-12-07 11:16:11,108 INFO L246 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2019-12-07 11:16:11,108 INFO L246 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2019-12-07 11:16:11,109 INFO L249 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2019-12-07 11:16:11,109 INFO L242 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (= fibo1_~n |fibo1_#in~n|)) [2019-12-07 11:16:11,109 INFO L246 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-12-07 11:16:11,109 INFO L242 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 4 fibo1_~n) .cse0) (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 1) .cse0))) (< 1 fibo1_~n) (or (<= 6 |fibo1_#in~n|) (and (<= 3 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 3)) (<= |fibo1_#in~n| 4))) [2019-12-07 11:16:11,109 INFO L246 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2019-12-07 11:16:11,109 INFO L246 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2019-12-07 11:16:11,109 INFO L246 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-12-07 11:16:11,109 INFO L246 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2019-12-07 11:16:11,109 INFO L246 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2019-12-07 11:16:11,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 11:16:11 BoogieIcfgContainer [2019-12-07 11:16:11,119 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 11:16:11,119 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 11:16:11,119 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 11:16:11,119 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 11:16:11,119 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 11:16:02" (3/4) ... [2019-12-07 11:16:11,121 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 11:16:11,126 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2019-12-07 11:16:11,126 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2019-12-07 11:16:11,128 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 11:16:11,129 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 11:16:11,157 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_24b9e07e-facd-4c27-b650-e4e725d3c298/bin/uautomizer/witness.graphml [2019-12-07 11:16:11,157 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 11:16:11,158 INFO L168 Benchmark]: Toolchain (without parser) took 9247.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 183.0 MB). Free memory was 939.4 MB in the beginning and 912.7 MB in the end (delta: 26.7 MB). Peak memory consumption was 209.7 MB. Max. memory is 11.5 GB. [2019-12-07 11:16:11,158 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:16:11,158 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.67 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 82.3 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -137.7 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-12-07 11:16:11,159 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.50 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:16:11,159 INFO L168 Benchmark]: Boogie Preprocessor took 10.70 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 11:16:11,159 INFO L168 Benchmark]: RCFGBuilder took 146.90 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 11.5 GB. [2019-12-07 11:16:11,159 INFO L168 Benchmark]: TraceAbstraction took 8850.25 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 100.7 MB). Free memory was 1.1 GB in the beginning and 915.2 MB in the end (delta: 145.1 MB). Peak memory consumption was 245.8 MB. Max. memory is 11.5 GB. [2019-12-07 11:16:11,160 INFO L168 Benchmark]: Witness Printer took 37.93 ms. Allocated memory is still 1.2 GB. Free memory was 915.2 MB in the beginning and 912.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 11.5 GB. [2019-12-07 11:16:11,161 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 955.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 178.67 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 82.3 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -137.7 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.50 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.70 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 146.90 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8850.25 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 100.7 MB). Free memory was 1.1 GB in the beginning and 915.2 MB in the end (delta: 145.1 MB). Peak memory consumption was 245.8 MB. Max. memory is 11.5 GB. * Witness Printer took 37.93 ms. Allocated memory is still 1.2 GB. Free memory was 915.2 MB in the beginning and 912.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 5 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: SAFE, OverallTime: 8.3s, OverallIterations: 13, TraceHistogramMax: 10, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, HoareTripleCheckerStatistics: 350 SDtfs, 544 SDslu, 2847 SDs, 0 SdLazy, 3649 SolverSat, 546 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1266 GetRequests, 1021 SyntacticMatches, 10 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 94 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 368 PreInvPairs, 511 NumberOfFragments, 105 HoareAnnotationTreeSize, 368 FomulaSimplifications, 1916 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 3623 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 1635 NumberOfCodeBlocks, 1541 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 1611 ConstructedInterpolants, 0 QuantifiedInterpolants, 319341 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1595 ConjunctsInSsa, 145 ConjunctsInUnsatCore, 24 InterpolantComputations, 3 PerfectInterpolantSequences, 2724/3528 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...