./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/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 fe571d33601eb001defa960d70b02ea99b59263c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-25 08:46:18,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:46:18,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:46:18,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:46:18,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:46:18,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:46:18,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:46:18,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:46:18,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:46:18,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:46:18,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:46:18,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:46:18,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:46:18,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:46:18,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:46:18,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:46:18,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:46:18,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:46:18,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:46:18,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:46:18,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:46:18,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:46:18,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:46:18,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:46:18,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:46:18,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:46:18,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:46:18,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:46:18,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:46:18,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:46:18,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:46:18,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:46:18,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:46:18,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:46:18,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:46:18,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:46:18,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:46:18,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:46:18,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:46:18,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:46:18,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:46:18,164 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:46:18,188 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:46:18,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:46:18,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:46:18,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:46:18,191 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:46:18,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:46:18,191 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:46:18,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:46:18,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:46:18,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:46:18,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:46:18,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:46:18,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:46:18,193 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:46:18,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:46:18,194 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:46:18,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:46:18,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:46:18,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:46:18,195 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:46:18,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:46:18,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:46:18,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:46:18,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:46:18,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:46:18,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:46:18,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:46:18,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:46:18,197 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_7dac5606-89f2-48c9-9a8d-08b90693b873/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 -> fe571d33601eb001defa960d70b02ea99b59263c [2019-11-25 08:46:18,334 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:46:18,344 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:46:18,347 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:46:18,348 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:46:18,349 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:46:18,349 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2019-11-25 08:46:18,400 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/bin/uautomizer/data/bea4d9ad9/10a3aa3186fd48469fd7675d8dd44f06/FLAGb7088a259 [2019-11-25 08:46:18,811 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:46:18,812 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2019-11-25 08:46:18,817 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/bin/uautomizer/data/bea4d9ad9/10a3aa3186fd48469fd7675d8dd44f06/FLAGb7088a259 [2019-11-25 08:46:18,832 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/bin/uautomizer/data/bea4d9ad9/10a3aa3186fd48469fd7675d8dd44f06 [2019-11-25 08:46:18,835 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:46:18,836 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:46:18,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:46:18,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:46:18,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:46:18,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:46:18" (1/1) ... [2019-11-25 08:46:18,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64019e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:18, skipping insertion in model container [2019-11-25 08:46:18,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:46:18" (1/1) ... [2019-11-25 08:46:18,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:46:18,870 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:46:19,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:46:19,021 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:46:19,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:46:19,112 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:46:19,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19 WrapperNode [2019-11-25 08:46:19,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:46:19,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:46:19,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:46:19,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:46:19,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,126 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:46:19,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:46:19,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:46:19,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:46:19,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:46:19,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:46:19,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:46:19,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:46:19,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/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 [2019-11-25 08:46:19,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:46:19,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:46:19,205 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-11-25 08:46:19,205 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-11-25 08:46:19,205 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-11-25 08:46:19,205 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-11-25 08:46:19,459 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:46:19,459 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-25 08:46:19,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:46:19 BoogieIcfgContainer [2019-11-25 08:46:19,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:46:19,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:46:19,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:46:19,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:46:19,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:46:18" (1/3) ... [2019-11-25 08:46:19,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a6bbac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:46:19, skipping insertion in model container [2019-11-25 08:46:19,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (2/3) ... [2019-11-25 08:46:19,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a6bbac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:46:19, skipping insertion in model container [2019-11-25 08:46:19,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:46:19" (3/3) ... [2019-11-25 08:46:19,472 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2019-11-25 08:46:19,482 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:46:19,488 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:46:19,504 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:46:19,530 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:46:19,530 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:46:19,530 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:46:19,531 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:46:19,531 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:46:19,531 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:46:19,532 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:46:19,532 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:46:19,553 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-25 08:46:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-25 08:46:19,558 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:19,559 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:19,559 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:19,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:19,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-11-25 08:46:19,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:19,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284649257] [2019-11-25 08:46:19,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:46:19,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284649257] [2019-11-25 08:46:19,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:46:19,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-25 08:46:19,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283669295] [2019-11-25 08:46:19,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:46:19,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:19,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:46:19,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:46:19,793 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 7 states. [2019-11-25 08:46:19,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:19,930 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-25 08:46:19,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:46:19,932 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-25 08:46:19,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:19,941 INFO L225 Difference]: With dead ends: 38 [2019-11-25 08:46:19,941 INFO L226 Difference]: Without dead ends: 26 [2019-11-25 08:46:19,944 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:46:19,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-25 08:46:19,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-25 08:46:19,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:46:19,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-25 08:46:19,987 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-11-25 08:46:19,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:19,987 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-25 08:46:19,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:46:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-25 08:46:19,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-25 08:46:19,989 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:19,990 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:19,990 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:19,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:19,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-11-25 08:46:19,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:19,991 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731815382] [2019-11-25 08:46:19,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:46:20,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731815382] [2019-11-25 08:46:20,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:46:20,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-25 08:46:20,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246748523] [2019-11-25 08:46:20,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:46:20,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:20,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:46:20,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:46:20,090 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 7 states. [2019-11-25 08:46:20,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:20,190 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-25 08:46:20,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:46:20,191 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-25 08:46:20,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:20,192 INFO L225 Difference]: With dead ends: 32 [2019-11-25 08:46:20,192 INFO L226 Difference]: Without dead ends: 28 [2019-11-25 08:46:20,193 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:46:20,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-25 08:46:20,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-25 08:46:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:46:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-25 08:46:20,203 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-11-25 08:46:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:20,204 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-25 08:46:20,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:46:20,204 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-25 08:46:20,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-25 08:46:20,205 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:20,205 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:20,205 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:20,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:20,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-11-25 08:46:20,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:20,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466365509] [2019-11-25 08:46:20,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:46:20,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466365509] [2019-11-25 08:46:20,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660916003] [2019-11-25 08:46:20,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/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 [2019-11-25 08:46:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:46:20,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:46:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:46:20,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:46:20,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-11-25 08:46:20,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558104945] [2019-11-25 08:46:20,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:46:20,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:20,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:46:20,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:46:20,483 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 12 states. [2019-11-25 08:46:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:20,647 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-11-25 08:46:20,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:46:20,649 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-11-25 08:46:20,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:20,650 INFO L225 Difference]: With dead ends: 59 [2019-11-25 08:46:20,650 INFO L226 Difference]: Without dead ends: 35 [2019-11-25 08:46:20,651 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:46:20,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-25 08:46:20,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-25 08:46:20,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-25 08:46:20,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-11-25 08:46:20,659 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-11-25 08:46:20,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:20,659 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-11-25 08:46:20,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:46:20,660 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-11-25 08:46:20,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-25 08:46:20,667 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:20,667 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] [2019-11-25 08:46:20,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:20,871 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:20,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:20,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-11-25 08:46:20,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:20,872 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403393825] [2019-11-25 08:46:20,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:46:21,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403393825] [2019-11-25 08:46:21,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741902122] [2019-11-25 08:46:21,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/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 [2019-11-25 08:46:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:21,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:46:21,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:46:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:46:21,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:46:21,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-11-25 08:46:21,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774766786] [2019-11-25 08:46:21,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:46:21,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:21,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:46:21,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:46:21,092 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 12 states. [2019-11-25 08:46:21,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:21,333 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-11-25 08:46:21,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:46:21,334 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-11-25 08:46:21,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:21,337 INFO L225 Difference]: With dead ends: 55 [2019-11-25 08:46:21,338 INFO L226 Difference]: Without dead ends: 51 [2019-11-25 08:46:21,338 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:46:21,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-25 08:46:21,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-25 08:46:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-25 08:46:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-11-25 08:46:21,362 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-11-25 08:46:21,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:21,363 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-11-25 08:46:21,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:46:21,363 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-11-25 08:46:21,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-25 08:46:21,369 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:21,371 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:21,576 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:21,577 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:21,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:21,577 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-11-25 08:46:21,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:21,578 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125040948] [2019-11-25 08:46:21,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-25 08:46:21,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125040948] [2019-11-25 08:46:21,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562900560] [2019-11-25 08:46:21,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/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 [2019-11-25 08:46:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:21,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:46:21,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:46:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-25 08:46:21,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:46:21,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2019-11-25 08:46:21,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019387807] [2019-11-25 08:46:21,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-25 08:46:21,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:21,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-25 08:46:21,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:46:21,888 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 14 states. [2019-11-25 08:46:22,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:22,313 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-11-25 08:46:22,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-25 08:46:22,314 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2019-11-25 08:46:22,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:22,317 INFO L225 Difference]: With dead ends: 114 [2019-11-25 08:46:22,317 INFO L226 Difference]: Without dead ends: 68 [2019-11-25 08:46:22,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2019-11-25 08:46:22,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-25 08:46:22,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-11-25 08:46:22,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-25 08:46:22,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-11-25 08:46:22,342 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-11-25 08:46:22,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:22,343 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-11-25 08:46:22,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-25 08:46:22,343 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-11-25 08:46:22,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-25 08:46:22,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:22,345 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] [2019-11-25 08:46:22,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:22,550 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:22,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:22,551 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-11-25 08:46:22,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:22,551 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475581355] [2019-11-25 08:46:22,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-25 08:46:22,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475581355] [2019-11-25 08:46:22,736 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243086165] [2019-11-25 08:46:22,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/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 [2019-11-25 08:46:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:22,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:46:22,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:46:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-25 08:46:22,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:46:22,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-11-25 08:46:22,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275866801] [2019-11-25 08:46:22,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-25 08:46:22,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:22,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-25 08:46:22,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:46:22,867 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 14 states. [2019-11-25 08:46:23,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:23,161 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-11-25 08:46:23,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-25 08:46:23,161 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-11-25 08:46:23,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:23,164 INFO L225 Difference]: With dead ends: 147 [2019-11-25 08:46:23,164 INFO L226 Difference]: Without dead ends: 83 [2019-11-25 08:46:23,166 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:46:23,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-25 08:46:23,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-11-25 08:46:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-25 08:46:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-11-25 08:46:23,191 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-11-25 08:46:23,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:23,192 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-11-25 08:46:23,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-25 08:46:23,192 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-11-25 08:46:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-25 08:46:23,196 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:23,197 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] [2019-11-25 08:46:23,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:23,400 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:23,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:23,400 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-11-25 08:46:23,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:23,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80111909] [2019-11-25 08:46:23,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-25 08:46:23,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80111909] [2019-11-25 08:46:23,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605792865] [2019-11-25 08:46:23,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/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 [2019-11-25 08:46:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:23,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:46:23,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:46:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-25 08:46:23,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:46:23,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2019-11-25 08:46:23,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550490999] [2019-11-25 08:46:23,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-25 08:46:23,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:23,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-25 08:46:23,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:46:23,763 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 18 states. [2019-11-25 08:46:24,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:24,265 INFO L93 Difference]: Finished difference Result 164 states and 279 transitions. [2019-11-25 08:46:24,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-25 08:46:24,265 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2019-11-25 08:46:24,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:24,267 INFO L225 Difference]: With dead ends: 164 [2019-11-25 08:46:24,268 INFO L226 Difference]: Without dead ends: 100 [2019-11-25 08:46:24,270 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2019-11-25 08:46:24,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-25 08:46:24,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2019-11-25 08:46:24,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-25 08:46:24,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 145 transitions. [2019-11-25 08:46:24,286 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 145 transitions. Word has length 50 [2019-11-25 08:46:24,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:24,286 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 145 transitions. [2019-11-25 08:46:24,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-25 08:46:24,286 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 145 transitions. [2019-11-25 08:46:24,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-25 08:46:24,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:24,289 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] [2019-11-25 08:46:24,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:24,492 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:24,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:24,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1917551255, now seen corresponding path program 1 times [2019-11-25 08:46:24,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:24,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120398548] [2019-11-25 08:46:24,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 33 proven. 58 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-25 08:46:24,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120398548] [2019-11-25 08:46:24,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478937446] [2019-11-25 08:46:24,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/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 [2019-11-25 08:46:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:46:24,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:46:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 23 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-11-25 08:46:25,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:46:25,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 19 [2019-11-25 08:46:25,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935152502] [2019-11-25 08:46:25,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-25 08:46:25,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:25,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-25 08:46:25,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:46:25,024 INFO L87 Difference]: Start difference. First operand 89 states and 145 transitions. Second operand 19 states. [2019-11-25 08:46:25,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:25,581 INFO L93 Difference]: Finished difference Result 222 states and 415 transitions. [2019-11-25 08:46:25,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-25 08:46:25,582 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2019-11-25 08:46:25,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:25,586 INFO L225 Difference]: With dead ends: 222 [2019-11-25 08:46:25,586 INFO L226 Difference]: Without dead ends: 138 [2019-11-25 08:46:25,588 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2019-11-25 08:46:25,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-25 08:46:25,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2019-11-25 08:46:25,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-25 08:46:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2019-11-25 08:46:25,608 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 91 [2019-11-25 08:46:25,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:25,608 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2019-11-25 08:46:25,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-25 08:46:25,608 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2019-11-25 08:46:25,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-25 08:46:25,612 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:25,612 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:25,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:25,818 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:25,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:25,819 INFO L82 PathProgramCache]: Analyzing trace with hash 358391620, now seen corresponding path program 1 times [2019-11-25 08:46:25,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:25,820 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694836609] [2019-11-25 08:46:25,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:26,287 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 84 proven. 79 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2019-11-25 08:46:26,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694836609] [2019-11-25 08:46:26,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258133647] [2019-11-25 08:46:26,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/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 [2019-11-25 08:46:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:26,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-25 08:46:26,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:46:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 66 proven. 52 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2019-11-25 08:46:26,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:46:26,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 22 [2019-11-25 08:46:26,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322541192] [2019-11-25 08:46:26,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-25 08:46:26,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:26,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-25 08:46:26,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2019-11-25 08:46:26,483 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 22 states. [2019-11-25 08:46:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:27,204 INFO L93 Difference]: Finished difference Result 304 states and 608 transitions. [2019-11-25 08:46:27,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-25 08:46:27,205 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 105 [2019-11-25 08:46:27,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:27,208 INFO L225 Difference]: With dead ends: 304 [2019-11-25 08:46:27,208 INFO L226 Difference]: Without dead ends: 153 [2019-11-25 08:46:27,210 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2019-11-25 08:46:27,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-11-25 08:46:27,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 130. [2019-11-25 08:46:27,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-25 08:46:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 209 transitions. [2019-11-25 08:46:27,245 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 209 transitions. Word has length 105 [2019-11-25 08:46:27,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:27,246 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 209 transitions. [2019-11-25 08:46:27,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-25 08:46:27,246 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 209 transitions. [2019-11-25 08:46:27,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-25 08:46:27,254 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:27,254 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] [2019-11-25 08:46:27,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:27,465 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:27,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:27,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1449179333, now seen corresponding path program 2 times [2019-11-25 08:46:27,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:27,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038365583] [2019-11-25 08:46:27,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 71 proven. 6 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-25 08:46:27,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038365583] [2019-11-25 08:46:27,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595604200] [2019-11-25 08:46:27,646 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/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 [2019-11-25 08:46:27,708 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:46:27,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:46:27,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:46:27,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:46:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-11-25 08:46:27,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:46:27,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 9 [2019-11-25 08:46:27,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928247876] [2019-11-25 08:46:27,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:46:27,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:27,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:46:27,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:46:27,765 INFO L87 Difference]: Start difference. First operand 130 states and 209 transitions. Second operand 6 states. [2019-11-25 08:46:27,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:27,823 INFO L93 Difference]: Finished difference Result 236 states and 406 transitions. [2019-11-25 08:46:27,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:46:27,824 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-11-25 08:46:27,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:27,826 INFO L225 Difference]: With dead ends: 236 [2019-11-25 08:46:27,826 INFO L226 Difference]: Without dead ends: 109 [2019-11-25 08:46:27,828 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:46:27,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-25 08:46:27,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2019-11-25 08:46:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-25 08:46:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 156 transitions. [2019-11-25 08:46:27,838 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 156 transitions. Word has length 104 [2019-11-25 08:46:27,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:27,839 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 156 transitions. [2019-11-25 08:46:27,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:46:27,839 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 156 transitions. [2019-11-25 08:46:27,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-25 08:46:27,841 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:27,841 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, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:28,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:28,049 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:28,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:28,049 INFO L82 PathProgramCache]: Analyzing trace with hash 311986411, now seen corresponding path program 3 times [2019-11-25 08:46:28,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:28,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112463569] [2019-11-25 08:46:28,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 92 proven. 147 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-11-25 08:46:28,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112463569] [2019-11-25 08:46:28,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954243997] [2019-11-25 08:46:28,493 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/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 [2019-11-25 08:46:28,543 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-25 08:46:28,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:46:28,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:46:28,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:46:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 127 proven. 29 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2019-11-25 08:46:28,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:46:28,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 27 [2019-11-25 08:46:28,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650938936] [2019-11-25 08:46:28,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-25 08:46:28,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:28,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-25 08:46:28,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2019-11-25 08:46:28,691 INFO L87 Difference]: Start difference. First operand 106 states and 156 transitions. Second operand 27 states. [2019-11-25 08:46:29,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:29,371 INFO L93 Difference]: Finished difference Result 245 states and 416 transitions. [2019-11-25 08:46:29,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-25 08:46:29,372 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2019-11-25 08:46:29,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:29,374 INFO L225 Difference]: With dead ends: 245 [2019-11-25 08:46:29,374 INFO L226 Difference]: Without dead ends: 134 [2019-11-25 08:46:29,376 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2019-11-25 08:46:29,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-25 08:46:29,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 115. [2019-11-25 08:46:29,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-25 08:46:29,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 158 transitions. [2019-11-25 08:46:29,396 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 158 transitions. Word has length 132 [2019-11-25 08:46:29,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:29,397 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 158 transitions. [2019-11-25 08:46:29,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-25 08:46:29,397 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 158 transitions. [2019-11-25 08:46:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-25 08:46:29,399 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:29,399 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] [2019-11-25 08:46:29,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:29,602 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:29,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:29,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1882786525, now seen corresponding path program 4 times [2019-11-25 08:46:29,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:29,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57505589] [2019-11-25 08:46:29,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 60 proven. 49 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-25 08:46:29,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57505589] [2019-11-25 08:46:29,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264701576] [2019-11-25 08:46:29,893 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/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 [2019-11-25 08:46:29,946 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:46:29,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:46:29,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:46:29,954 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:46:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-25 08:46:30,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:46:30,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 21 [2019-11-25 08:46:30,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543515] [2019-11-25 08:46:30,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-25 08:46:30,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:30,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-25 08:46:30,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2019-11-25 08:46:30,073 INFO L87 Difference]: Start difference. First operand 115 states and 158 transitions. Second operand 21 states. [2019-11-25 08:46:30,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:30,481 INFO L93 Difference]: Finished difference Result 245 states and 346 transitions. [2019-11-25 08:46:30,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-25 08:46:30,485 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2019-11-25 08:46:30,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:30,486 INFO L225 Difference]: With dead ends: 245 [2019-11-25 08:46:30,486 INFO L226 Difference]: Without dead ends: 135 [2019-11-25 08:46:30,488 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2019-11-25 08:46:30,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-11-25 08:46:30,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 119. [2019-11-25 08:46:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-25 08:46:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 156 transitions. [2019-11-25 08:46:30,503 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 156 transitions. Word has length 91 [2019-11-25 08:46:30,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:30,503 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 156 transitions. [2019-11-25 08:46:30,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-25 08:46:30,504 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 156 transitions. [2019-11-25 08:46:30,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-25 08:46:30,505 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:30,505 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] [2019-11-25 08:46:30,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:30,709 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:30,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:30,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1335172610, now seen corresponding path program 5 times [2019-11-25 08:46:30,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:30,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050870161] [2019-11-25 08:46:30,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:46:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:46:30,745 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:46:30,746 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:46:30,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:46:30 BoogieIcfgContainer [2019-11-25 08:46:30,795 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:46:30,796 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:46:30,796 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:46:30,796 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:46:30,797 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:46:19" (3/4) ... [2019-11-25 08:46:30,799 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:46:30,871 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7dac5606-89f2-48c9-9a8d-08b90693b873/bin/uautomizer/witness.graphml [2019-11-25 08:46:30,871 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:46:30,873 INFO L168 Benchmark]: Toolchain (without parser) took 12036.89 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 313.5 MB). Free memory was 951.4 MB in the beginning and 982.6 MB in the end (delta: -31.2 MB). Peak memory consumption was 282.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:30,874 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:46:30,874 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -179.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:30,874 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.59 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:46:30,875 INFO L168 Benchmark]: Boogie Preprocessor took 13.89 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:46:30,875 INFO L168 Benchmark]: RCFGBuilder took 307.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:30,875 INFO L168 Benchmark]: TraceAbstraction took 11333.40 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 174.1 MB). Free memory was 1.1 GB in the beginning and 985.8 MB in the end (delta: 121.5 MB). Peak memory consumption was 295.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:30,876 INFO L168 Benchmark]: Witness Printer took 75.42 ms. Allocated memory is still 1.3 GB. Free memory was 985.8 MB in the beginning and 982.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:30,878 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 273.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -179.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.59 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.89 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 307.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 11333.40 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 174.1 MB). Free memory was 1.1 GB in the beginning and 985.8 MB in the end (delta: 121.5 MB). Peak memory consumption was 295.6 MB. Max. memory is 11.5 GB. * Witness Printer took 75.42 ms. Allocated memory is still 1.3 GB. Free memory was 985.8 MB in the beginning and 982.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 5; [L37] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 5 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: UNSAFE, OverallTime: 11.2s, OverallIterations: 13, TraceHistogramMax: 10, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 311 SDtfs, 561 SDslu, 2229 SDs, 0 SdLazy, 3823 SolverSat, 545 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1096 GetRequests, 871 SyntacticMatches, 3 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 124 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 1502 NumberOfCodeBlocks, 1434 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 1375 ConstructedInterpolants, 0 QuantifiedInterpolants, 220661 SizeOfPredicates, 40 NumberOfNonLiveVariables, 1398 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 22 InterpolantComputations, 3 PerfectInterpolantSequences, 2277/2852 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...