./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i20_o20-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i20_o20-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/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 7d05936c4bb1bb97a4b24ebc11d02c0e844c743b ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.1.24-678e011 [2019-11-20 04:54:14,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 04:54:14,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 04:54:14,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 04:54:14,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 04:54:14,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 04:54:14,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 04:54:14,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 04:54:14,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 04:54:14,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 04:54:14,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 04:54:14,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 04:54:14,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 04:54:14,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 04:54:14,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 04:54:14,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 04:54:14,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 04:54:14,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 04:54:14,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 04:54:14,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 04:54:14,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 04:54:14,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 04:54:14,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 04:54:14,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 04:54:14,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 04:54:14,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 04:54:14,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 04:54:14,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 04:54:14,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 04:54:14,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 04:54:14,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 04:54:14,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 04:54:14,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 04:54:14,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 04:54:14,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 04:54:14,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 04:54:14,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 04:54:14,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 04:54:14,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 04:54:14,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 04:54:14,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 04:54:14,382 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 04:54:14,406 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 04:54:14,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 04:54:14,417 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 04:54:14,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 04:54:14,418 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 04:54:14,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 04:54:14,418 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 04:54:14,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 04:54:14,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 04:54:14,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 04:54:14,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 04:54:14,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 04:54:14,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 04:54:14,420 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 04:54:14,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 04:54:14,420 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 04:54:14,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 04:54:14,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 04:54:14,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 04:54:14,421 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 04:54:14,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 04:54:14,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 04:54:14,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 04:54:14,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 04:54:14,423 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 04:54:14,423 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 04:54:14,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 04:54:14,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 04:54:14,424 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_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/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 -> 7d05936c4bb1bb97a4b24ebc11d02c0e844c743b [2019-11-20 04:54:14,587 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 04:54:14,603 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 04:54:14,606 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 04:54:14,609 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 04:54:14,614 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 04:54:14,614 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i20_o20-2.c [2019-11-20 04:54:14,679 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/data/b61f54bc1/48935c653c534a658ad21e31e6d633bb/FLAG0dd235f38 [2019-11-20 04:54:15,054 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 04:54:15,054 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/sv-benchmarks/c/recursive-simple/id_i20_o20-2.c [2019-11-20 04:54:15,058 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/data/b61f54bc1/48935c653c534a658ad21e31e6d633bb/FLAG0dd235f38 [2019-11-20 04:54:15,070 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/data/b61f54bc1/48935c653c534a658ad21e31e6d633bb [2019-11-20 04:54:15,073 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 04:54:15,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 04:54:15,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 04:54:15,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 04:54:15,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 04:54:15,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:54:15" (1/1) ... [2019-11-20 04:54:15,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b3340a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:54:15, skipping insertion in model container [2019-11-20 04:54:15,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:54:15" (1/1) ... [2019-11-20 04:54:15,089 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 04:54:15,103 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 04:54:15,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:54:15,259 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 04:54:15,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:54:15,374 INFO L192 MainTranslator]: Completed translation [2019-11-20 04:54:15,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:54:15 WrapperNode [2019-11-20 04:54:15,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 04:54:15,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 04:54:15,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 04:54:15,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 04:54:15,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:54:15" (1/1) ... [2019-11-20 04:54:15,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:54:15" (1/1) ... [2019-11-20 04:54:15,404 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 04:54:15,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 04:54:15,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 04:54:15,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 04:54:15,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:54:15" (1/1) ... [2019-11-20 04:54:15,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:54:15" (1/1) ... [2019-11-20 04:54:15,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:54:15" (1/1) ... [2019-11-20 04:54:15,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:54:15" (1/1) ... [2019-11-20 04:54:15,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:54:15" (1/1) ... [2019-11-20 04:54:15,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:54:15" (1/1) ... [2019-11-20 04:54:15,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:54:15" (1/1) ... [2019-11-20 04:54:15,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 04:54:15,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 04:54:15,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 04:54:15,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 04:54:15,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:54:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/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 [2019-11-20 04:54:15,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 04:54:15,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 04:54:15,486 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-20 04:54:15,486 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-20 04:54:15,649 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 04:54:15,650 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 04:54:15,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:54:15 BoogieIcfgContainer [2019-11-20 04:54:15,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 04:54:15,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 04:54:15,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 04:54:15,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 04:54:15,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 04:54:15" (1/3) ... [2019-11-20 04:54:15,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e297ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:54:15, skipping insertion in model container [2019-11-20 04:54:15,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:54:15" (2/3) ... [2019-11-20 04:54:15,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e297ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:54:15, skipping insertion in model container [2019-11-20 04:54:15,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:54:15" (3/3) ... [2019-11-20 04:54:15,662 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i20_o20-2.c [2019-11-20 04:54:15,669 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 04:54:15,675 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 04:54:15,687 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 04:54:15,706 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 04:54:15,706 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 04:54:15,707 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 04:54:15,707 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 04:54:15,707 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 04:54:15,707 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 04:54:15,707 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 04:54:15,707 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 04:54:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-20 04:54:15,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 04:54:15,727 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:15,728 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:15,728 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:15,733 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-20 04:54:15,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:15,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135475272] [2019-11-20 04:54:15,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:54:15,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135475272] [2019-11-20 04:54:15,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:54:15,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-20 04:54:15,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999972757] [2019-11-20 04:54:15,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 04:54:15,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:15,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 04:54:15,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-20 04:54:15,948 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-11-20 04:54:16,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:16,078 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-20 04:54:16,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 04:54:16,079 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-20 04:54:16,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:16,087 INFO L225 Difference]: With dead ends: 24 [2019-11-20 04:54:16,087 INFO L226 Difference]: Without dead ends: 14 [2019-11-20 04:54:16,090 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 [2019-11-20 04:54:16,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-20 04:54:16,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-20 04:54:16,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-20 04:54:16,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-20 04:54:16,126 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-20 04:54:16,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:16,127 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-20 04:54:16,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 04:54:16,127 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-20 04:54:16,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 04:54:16,128 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:16,129 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:16,129 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:16,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:16,129 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-20 04:54:16,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:16,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218842119] [2019-11-20 04:54:16,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 04:54:16,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218842119] [2019-11-20 04:54:16,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490405034] [2019-11-20 04:54:16,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/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 [2019-11-20 04:54:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:16,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 04:54:16,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 04:54:16,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:16,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2019-11-20 04:54:16,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974491385] [2019-11-20 04:54:16,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 04:54:16,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:16,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 04:54:16,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 04:54:16,385 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 10 states. [2019-11-20 04:54:16,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:16,521 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-20 04:54:16,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 04:54:16,522 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-20 04:54:16,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:16,523 INFO L225 Difference]: With dead ends: 21 [2019-11-20 04:54:16,523 INFO L226 Difference]: Without dead ends: 17 [2019-11-20 04:54:16,525 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-11-20 04:54:16,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-20 04:54:16,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-20 04:54:16,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-20 04:54:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-20 04:54:16,530 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-20 04:54:16,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:16,530 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-20 04:54:16,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 04:54:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-20 04:54:16,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 04:54:16,536 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:16,536 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:16,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:16,738 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:16,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:16,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-20 04:54:16,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:16,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583720365] [2019-11-20 04:54:16,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 04:54:16,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583720365] [2019-11-20 04:54:16,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447154310] [2019-11-20 04:54:16,964 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/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 [2019-11-20 04:54:17,000 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:54:17,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:54:17,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 04:54:17,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 04:54:17,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:17,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2019-11-20 04:54:17,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35230096] [2019-11-20 04:54:17,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 04:54:17,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:17,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 04:54:17,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-20 04:54:17,039 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2019-11-20 04:54:17,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:17,128 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-20 04:54:17,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 04:54:17,129 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-11-20 04:54:17,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:17,130 INFO L225 Difference]: With dead ends: 24 [2019-11-20 04:54:17,130 INFO L226 Difference]: Without dead ends: 20 [2019-11-20 04:54:17,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-11-20 04:54:17,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-20 04:54:17,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-20 04:54:17,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-20 04:54:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-20 04:54:17,136 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-20 04:54:17,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:17,137 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-20 04:54:17,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 04:54:17,137 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-20 04:54:17,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 04:54:17,138 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:17,138 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:17,343 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:17,343 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:17,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:17,344 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-20 04:54:17,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:17,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392986012] [2019-11-20 04:54:17,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-20 04:54:17,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392986012] [2019-11-20 04:54:17,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000926008] [2019-11-20 04:54:17,513 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/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 [2019-11-20 04:54:17,553 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-20 04:54:17,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:54:17,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 04:54:17,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-20 04:54:17,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:17,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2019-11-20 04:54:17,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968302439] [2019-11-20 04:54:17,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 04:54:17,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:17,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 04:54:17,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-20 04:54:17,598 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 12 states. [2019-11-20 04:54:17,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:17,712 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-20 04:54:17,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 04:54:17,713 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-20 04:54:17,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:17,714 INFO L225 Difference]: With dead ends: 27 [2019-11-20 04:54:17,714 INFO L226 Difference]: Without dead ends: 23 [2019-11-20 04:54:17,714 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-20 04:54:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-20 04:54:17,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-20 04:54:17,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-20 04:54:17,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-20 04:54:17,722 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-20 04:54:17,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:17,722 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-20 04:54:17,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 04:54:17,723 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-20 04:54:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-20 04:54:17,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:17,726 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:17,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:17,927 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:17,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:17,927 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-20 04:54:17,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:17,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140953801] [2019-11-20 04:54:17,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-20 04:54:18,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140953801] [2019-11-20 04:54:18,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636172013] [2019-11-20 04:54:18,153 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/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 [2019-11-20 04:54:18,186 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 04:54:18,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:54:18,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 04:54:18,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-20 04:54:18,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:18,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2019-11-20 04:54:18,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098004346] [2019-11-20 04:54:18,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 04:54:18,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:18,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 04:54:18,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-11-20 04:54:18,240 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 13 states. [2019-11-20 04:54:18,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:18,362 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-20 04:54:18,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 04:54:18,362 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-11-20 04:54:18,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:18,363 INFO L225 Difference]: With dead ends: 30 [2019-11-20 04:54:18,363 INFO L226 Difference]: Without dead ends: 26 [2019-11-20 04:54:18,364 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-11-20 04:54:18,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-20 04:54:18,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-20 04:54:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 04:54:18,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-20 04:54:18,368 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-20 04:54:18,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:18,369 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-20 04:54:18,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 04:54:18,369 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-20 04:54:18,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-20 04:54:18,370 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:18,370 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:18,576 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:18,576 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:18,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:18,576 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-20 04:54:18,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:18,577 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644740391] [2019-11-20 04:54:18,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-20 04:54:18,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644740391] [2019-11-20 04:54:18,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457455681] [2019-11-20 04:54:18,803 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/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 [2019-11-20 04:54:18,847 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-20 04:54:18,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:54:18,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 04:54:18,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-20 04:54:18,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:18,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2019-11-20 04:54:18,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662419121] [2019-11-20 04:54:18,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 04:54:18,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:18,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 04:54:18,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-20 04:54:18,903 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 14 states. [2019-11-20 04:54:19,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:19,066 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-20 04:54:19,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 04:54:19,067 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2019-11-20 04:54:19,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:19,068 INFO L225 Difference]: With dead ends: 33 [2019-11-20 04:54:19,068 INFO L226 Difference]: Without dead ends: 29 [2019-11-20 04:54:19,069 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2019-11-20 04:54:19,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-20 04:54:19,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-20 04:54:19,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-20 04:54:19,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-20 04:54:19,074 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-20 04:54:19,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:19,075 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-20 04:54:19,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 04:54:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-20 04:54:19,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-20 04:54:19,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:19,082 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:19,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:19,282 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:19,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:19,283 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-20 04:54:19,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:19,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367798685] [2019-11-20 04:54:19,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-20 04:54:19,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367798685] [2019-11-20 04:54:19,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811838205] [2019-11-20 04:54:19,509 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/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 [2019-11-20 04:54:19,548 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-20 04:54:19,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:54:19,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 04:54:19,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-20 04:54:19,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:19,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2019-11-20 04:54:19,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059351771] [2019-11-20 04:54:19,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-20 04:54:19,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:19,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-20 04:54:19,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2019-11-20 04:54:19,843 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 28 states. [2019-11-20 04:54:20,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:20,220 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-20 04:54:20,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 04:54:20,220 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 45 [2019-11-20 04:54:20,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:20,222 INFO L225 Difference]: With dead ends: 36 [2019-11-20 04:54:20,222 INFO L226 Difference]: Without dead ends: 32 [2019-11-20 04:54:20,223 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2019-11-20 04:54:20,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-20 04:54:20,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-20 04:54:20,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-20 04:54:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-20 04:54:20,231 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-20 04:54:20,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:20,231 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-20 04:54:20,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-20 04:54:20,231 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-20 04:54:20,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-20 04:54:20,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:20,233 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:20,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:20,440 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:20,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:20,440 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-20 04:54:20,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:20,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159020686] [2019-11-20 04:54:20,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-20 04:54:20,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159020686] [2019-11-20 04:54:20,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348135029] [2019-11-20 04:54:20,734 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/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 [2019-11-20 04:54:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:20,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 04:54:20,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-20 04:54:20,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:20,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 16 [2019-11-20 04:54:20,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283864431] [2019-11-20 04:54:20,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 04:54:20,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:20,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 04:54:20,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-11-20 04:54:20,851 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2019-11-20 04:54:21,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:21,003 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-20 04:54:21,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 04:54:21,004 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2019-11-20 04:54:21,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:21,005 INFO L225 Difference]: With dead ends: 39 [2019-11-20 04:54:21,005 INFO L226 Difference]: Without dead ends: 35 [2019-11-20 04:54:21,006 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2019-11-20 04:54:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-20 04:54:21,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-20 04:54:21,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-20 04:54:21,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-20 04:54:21,012 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-20 04:54:21,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:21,012 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-20 04:54:21,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 04:54:21,012 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-20 04:54:21,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-20 04:54:21,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:21,014 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:21,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:21,219 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:21,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:21,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-20 04:54:21,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:21,220 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860712418] [2019-11-20 04:54:21,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-20 04:54:21,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860712418] [2019-11-20 04:54:21,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893906073] [2019-11-20 04:54:21,468 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/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 [2019-11-20 04:54:21,514 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:54:21,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:54:21,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 04:54:21,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-20 04:54:21,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:21,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2019-11-20 04:54:21,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283494804] [2019-11-20 04:54:21,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 04:54:21,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:21,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 04:54:21,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-20 04:54:21,571 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 17 states. [2019-11-20 04:54:21,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:21,722 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-20 04:54:21,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 04:54:21,722 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2019-11-20 04:54:21,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:21,724 INFO L225 Difference]: With dead ends: 42 [2019-11-20 04:54:21,724 INFO L226 Difference]: Without dead ends: 38 [2019-11-20 04:54:21,725 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2019-11-20 04:54:21,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-20 04:54:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-20 04:54:21,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-20 04:54:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-20 04:54:21,730 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-20 04:54:21,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:21,730 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-20 04:54:21,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 04:54:21,730 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-20 04:54:21,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-20 04:54:21,734 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:21,734 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:21,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:21,934 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:21,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:21,935 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-20 04:54:21,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:21,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650023856] [2019-11-20 04:54:21,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-20 04:54:22,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650023856] [2019-11-20 04:54:22,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848578449] [2019-11-20 04:54:22,265 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/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 [2019-11-20 04:54:22,325 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-20 04:54:22,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:54:22,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 04:54:22,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-20 04:54:22,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:22,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23] total 37 [2019-11-20 04:54:22,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584063039] [2019-11-20 04:54:22,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-20 04:54:22,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:22,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-20 04:54:22,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2019-11-20 04:54:22,863 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 37 states. [2019-11-20 04:54:23,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:23,357 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-20 04:54:23,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-20 04:54:23,358 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 63 [2019-11-20 04:54:23,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:23,359 INFO L225 Difference]: With dead ends: 45 [2019-11-20 04:54:23,359 INFO L226 Difference]: Without dead ends: 41 [2019-11-20 04:54:23,360 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2019-11-20 04:54:23,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-20 04:54:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-20 04:54:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-20 04:54:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-20 04:54:23,366 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-20 04:54:23,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:23,366 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-20 04:54:23,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-20 04:54:23,371 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-20 04:54:23,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-20 04:54:23,374 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:23,375 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:23,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:23,578 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:23,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:23,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-20 04:54:23,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:23,579 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902748802] [2019-11-20 04:54:23,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-20 04:54:23,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902748802] [2019-11-20 04:54:23,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889442453] [2019-11-20 04:54:23,897 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/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 [2019-11-20 04:54:23,951 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 04:54:23,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:54:23,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 04:54:23,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-20 04:54:24,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:24,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 19 [2019-11-20 04:54:24,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762505640] [2019-11-20 04:54:24,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-20 04:54:24,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:24,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 04:54:24,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-11-20 04:54:24,021 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 19 states. [2019-11-20 04:54:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:24,170 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-11-20 04:54:24,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 04:54:24,170 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2019-11-20 04:54:24,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:24,171 INFO L225 Difference]: With dead ends: 48 [2019-11-20 04:54:24,171 INFO L226 Difference]: Without dead ends: 44 [2019-11-20 04:54:24,172 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2019-11-20 04:54:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-20 04:54:24,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-20 04:54:24,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-20 04:54:24,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-20 04:54:24,178 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-11-20 04:54:24,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:24,179 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-20 04:54:24,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-20 04:54:24,179 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-20 04:54:24,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-20 04:54:24,181 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:24,181 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:24,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:24,384 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:24,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:24,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-11-20 04:54:24,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:24,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763707502] [2019-11-20 04:54:24,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-20 04:54:24,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763707502] [2019-11-20 04:54:24,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004259966] [2019-11-20 04:54:24,768 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:24,831 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-20 04:54:24,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:54:24,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-20 04:54:24,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:24,927 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-20 04:54:24,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:24,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 20 [2019-11-20 04:54:24,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924770367] [2019-11-20 04:54:24,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 04:54:24,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:24,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 04:54:24,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-11-20 04:54:24,930 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2019-11-20 04:54:25,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:25,125 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-11-20 04:54:25,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 04:54:25,125 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2019-11-20 04:54:25,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:25,126 INFO L225 Difference]: With dead ends: 51 [2019-11-20 04:54:25,126 INFO L226 Difference]: Without dead ends: 47 [2019-11-20 04:54:25,127 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=683, Unknown=0, NotChecked=0, Total=992 [2019-11-20 04:54:25,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-20 04:54:25,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-20 04:54:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-20 04:54:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-20 04:54:25,136 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-11-20 04:54:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:25,136 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-20 04:54:25,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 04:54:25,137 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-20 04:54:25,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-20 04:54:25,138 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:25,138 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:25,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:25,341 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:25,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:25,342 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-11-20 04:54:25,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:25,342 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854301631] [2019-11-20 04:54:25,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-20 04:54:25,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854301631] [2019-11-20 04:54:25,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961493437] [2019-11-20 04:54:25,742 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:25,794 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-20 04:54:25,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:54:25,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-20 04:54:25,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-20 04:54:25,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:25,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 21 [2019-11-20 04:54:25,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146472133] [2019-11-20 04:54:25,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 04:54:25,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:25,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 04:54:25,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-11-20 04:54:25,878 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 21 states. [2019-11-20 04:54:26,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:26,092 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-11-20 04:54:26,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 04:54:26,093 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2019-11-20 04:54:26,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:26,094 INFO L225 Difference]: With dead ends: 54 [2019-11-20 04:54:26,094 INFO L226 Difference]: Without dead ends: 50 [2019-11-20 04:54:26,095 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=769, Unknown=0, NotChecked=0, Total=1122 [2019-11-20 04:54:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-20 04:54:26,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-20 04:54:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-20 04:54:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-20 04:54:26,108 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-11-20 04:54:26,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:26,109 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-20 04:54:26,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 04:54:26,109 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-20 04:54:26,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-20 04:54:26,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:26,111 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:26,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:26,321 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:26,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:26,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-11-20 04:54:26,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:26,322 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761048282] [2019-11-20 04:54:26,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-20 04:54:26,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761048282] [2019-11-20 04:54:26,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769810855] [2019-11-20 04:54:26,793 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:26,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-20 04:54:26,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-20 04:54:26,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:26,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 22 [2019-11-20 04:54:26,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834996487] [2019-11-20 04:54:26,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-20 04:54:26,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:26,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 04:54:26,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2019-11-20 04:54:26,922 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 22 states. [2019-11-20 04:54:27,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:27,123 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-11-20 04:54:27,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-20 04:54:27,123 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2019-11-20 04:54:27,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:27,124 INFO L225 Difference]: With dead ends: 57 [2019-11-20 04:54:27,124 INFO L226 Difference]: Without dead ends: 53 [2019-11-20 04:54:27,125 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=400, Invalid=860, Unknown=0, NotChecked=0, Total=1260 [2019-11-20 04:54:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-20 04:54:27,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-20 04:54:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-20 04:54:27,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-20 04:54:27,131 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-11-20 04:54:27,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:27,132 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-20 04:54:27,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-20 04:54:27,132 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-20 04:54:27,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-20 04:54:27,134 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:27,134 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:27,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:27,337 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:27,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:27,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-11-20 04:54:27,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:27,337 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699620236] [2019-11-20 04:54:27,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-20 04:54:27,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699620236] [2019-11-20 04:54:27,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349483860] [2019-11-20 04:54:27,834 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:27,884 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:54:27,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:54:27,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-20 04:54:27,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-20 04:54:27,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:27,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 23 [2019-11-20 04:54:27,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150127071] [2019-11-20 04:54:27,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-20 04:54:27,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:27,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-20 04:54:27,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2019-11-20 04:54:27,959 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 23 states. [2019-11-20 04:54:28,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:28,205 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-11-20 04:54:28,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 04:54:28,205 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 93 [2019-11-20 04:54:28,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:28,206 INFO L225 Difference]: With dead ends: 60 [2019-11-20 04:54:28,206 INFO L226 Difference]: Without dead ends: 56 [2019-11-20 04:54:28,207 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=450, Invalid=956, Unknown=0, NotChecked=0, Total=1406 [2019-11-20 04:54:28,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-20 04:54:28,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-20 04:54:28,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-20 04:54:28,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-11-20 04:54:28,213 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-11-20 04:54:28,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:28,213 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-11-20 04:54:28,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-20 04:54:28,213 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-11-20 04:54:28,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-20 04:54:28,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:28,214 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:28,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:28,418 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:28,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:28,419 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-11-20 04:54:28,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:28,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077198672] [2019-11-20 04:54:28,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-20 04:54:28,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077198672] [2019-11-20 04:54:28,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135282818] [2019-11-20 04:54:28,907 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:28,970 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-20 04:54:28,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:54:28,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-20 04:54:28,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-20 04:54:29,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:29,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 24 [2019-11-20 04:54:29,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234782842] [2019-11-20 04:54:29,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-20 04:54:29,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:29,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-20 04:54:29,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2019-11-20 04:54:29,038 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 24 states. [2019-11-20 04:54:29,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:29,334 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-11-20 04:54:29,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-20 04:54:29,335 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2019-11-20 04:54:29,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:29,336 INFO L225 Difference]: With dead ends: 63 [2019-11-20 04:54:29,336 INFO L226 Difference]: Without dead ends: 59 [2019-11-20 04:54:29,337 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=503, Invalid=1057, Unknown=0, NotChecked=0, Total=1560 [2019-11-20 04:54:29,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-20 04:54:29,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-20 04:54:29,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-20 04:54:29,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-11-20 04:54:29,342 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2019-11-20 04:54:29,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:29,342 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-11-20 04:54:29,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-20 04:54:29,342 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-11-20 04:54:29,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-20 04:54:29,346 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:29,346 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:29,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:29,551 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:29,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:29,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2019-11-20 04:54:29,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:29,552 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134137766] [2019-11-20 04:54:29,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-20 04:54:30,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134137766] [2019-11-20 04:54:30,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763273754] [2019-11-20 04:54:30,177 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:30,236 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 04:54:30,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:54:30,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-20 04:54:30,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-20 04:54:30,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:30,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 25 [2019-11-20 04:54:30,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101707995] [2019-11-20 04:54:30,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-20 04:54:30,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:30,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-20 04:54:30,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2019-11-20 04:54:30,316 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 25 states. [2019-11-20 04:54:30,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:30,567 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-11-20 04:54:30,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 04:54:30,567 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 105 [2019-11-20 04:54:30,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:30,568 INFO L225 Difference]: With dead ends: 66 [2019-11-20 04:54:30,568 INFO L226 Difference]: Without dead ends: 62 [2019-11-20 04:54:30,569 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=559, Invalid=1163, Unknown=0, NotChecked=0, Total=1722 [2019-11-20 04:54:30,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-20 04:54:30,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-20 04:54:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-20 04:54:30,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-11-20 04:54:30,576 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2019-11-20 04:54:30,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:30,576 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-11-20 04:54:30,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-20 04:54:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-11-20 04:54:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-20 04:54:30,584 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:30,585 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:30,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:30,788 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:30,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:30,788 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2019-11-20 04:54:30,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:30,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741617016] [2019-11-20 04:54:30,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-20 04:54:31,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741617016] [2019-11-20 04:54:31,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748243754] [2019-11-20 04:54:31,409 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:31,470 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-20 04:54:31,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:54:31,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-20 04:54:31,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-20 04:54:31,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:31,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 26 [2019-11-20 04:54:31,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178125000] [2019-11-20 04:54:31,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-20 04:54:31,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:31,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-20 04:54:31,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2019-11-20 04:54:31,553 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 26 states. [2019-11-20 04:54:31,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:31,830 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-11-20 04:54:31,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-20 04:54:31,831 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 111 [2019-11-20 04:54:31,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:31,832 INFO L225 Difference]: With dead ends: 69 [2019-11-20 04:54:31,832 INFO L226 Difference]: Without dead ends: 65 [2019-11-20 04:54:31,833 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2019-11-20 04:54:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-20 04:54:31,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-11-20 04:54:31,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-20 04:54:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-11-20 04:54:31,838 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2019-11-20 04:54:31,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:31,839 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-11-20 04:54:31,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-20 04:54:31,841 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-11-20 04:54:31,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-20 04:54:31,842 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:31,843 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:32,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:32,052 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:32,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:32,053 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2019-11-20 04:54:32,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:32,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134464026] [2019-11-20 04:54:32,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-20 04:54:32,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134464026] [2019-11-20 04:54:32,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022835178] [2019-11-20 04:54:32,720 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:32,789 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-20 04:54:32,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:54:32,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-20 04:54:32,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-20 04:54:32,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:32,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 27 [2019-11-20 04:54:32,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378525714] [2019-11-20 04:54:32,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-20 04:54:32,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:32,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-20 04:54:32,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2019-11-20 04:54:32,890 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 27 states. [2019-11-20 04:54:33,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:33,213 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2019-11-20 04:54:33,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-20 04:54:33,214 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 117 [2019-11-20 04:54:33,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:33,214 INFO L225 Difference]: With dead ends: 72 [2019-11-20 04:54:33,215 INFO L226 Difference]: Without dead ends: 68 [2019-11-20 04:54:33,215 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=680, Invalid=1390, Unknown=0, NotChecked=0, Total=2070 [2019-11-20 04:54:33,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-20 04:54:33,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-20 04:54:33,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-20 04:54:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2019-11-20 04:54:33,220 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2019-11-20 04:54:33,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:33,221 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2019-11-20 04:54:33,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-20 04:54:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2019-11-20 04:54:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-20 04:54:33,222 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:33,222 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:33,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:33,427 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:33,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:33,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2019-11-20 04:54:33,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:33,427 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248302104] [2019-11-20 04:54:33,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-20 04:54:34,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248302104] [2019-11-20 04:54:34,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102603836] [2019-11-20 04:54:34,202 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:54:34,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-20 04:54:34,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:54:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-20 04:54:34,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:54:34,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 28 [2019-11-20 04:54:34,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789871628] [2019-11-20 04:54:34,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-20 04:54:34,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:54:34,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-20 04:54:34,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2019-11-20 04:54:34,356 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 28 states. [2019-11-20 04:54:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:54:34,641 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2019-11-20 04:54:34,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-20 04:54:34,642 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 123 [2019-11-20 04:54:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:54:34,642 INFO L225 Difference]: With dead ends: 75 [2019-11-20 04:54:34,643 INFO L226 Difference]: Without dead ends: 71 [2019-11-20 04:54:34,644 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2019-11-20 04:54:34,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-20 04:54:34,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-20 04:54:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-20 04:54:34,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-11-20 04:54:34,648 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2019-11-20 04:54:34,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:54:34,649 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-11-20 04:54:34,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-20 04:54:34,649 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-11-20 04:54:34,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-20 04:54:34,650 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:54:34,650 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:54:34,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:54:34,850 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:54:34,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:54:34,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2019-11-20 04:54:34,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:54:34,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828014459] [2019-11-20 04:54:34,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:54:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:54:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:54:34,909 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:54:34,910 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 04:54:34,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 04:54:34 BoogieIcfgContainer [2019-11-20 04:54:34,958 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 04:54:34,959 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 04:54:34,959 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 04:54:34,959 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 04:54:34,960 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:54:15" (3/4) ... [2019-11-20 04:54:34,962 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 04:54:35,051 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_58dfd130-c4c1-4074-9bde-ff2c2d06e1b7/bin/uautomizer/witness.graphml [2019-11-20 04:54:35,051 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 04:54:35,054 INFO L168 Benchmark]: Toolchain (without parser) took 19979.01 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 310.9 MB). Free memory was 946.1 MB in the beginning and 1.0 GB in the end (delta: -97.9 MB). Peak memory consumption was 213.0 MB. Max. memory is 11.5 GB. [2019-11-20 04:54:35,054 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:54:35,055 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.76 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.7 MB). Free memory was 946.1 MB in the beginning and 1.2 GB in the end (delta: -215.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-20 04:54:35,055 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.07 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:54:35,055 INFO L168 Benchmark]: Boogie Preprocessor took 16.00 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:54:35,056 INFO L168 Benchmark]: RCFGBuilder took 230.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-20 04:54:35,056 INFO L168 Benchmark]: TraceAbstraction took 19306.78 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 144.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 87.8 MB). Peak memory consumption was 231.9 MB. Max. memory is 11.5 GB. [2019-11-20 04:54:35,056 INFO L168 Benchmark]: Witness Printer took 92.83 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 11.5 GB. [2019-11-20 04:54:35,058 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 299.76 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.7 MB). Free memory was 946.1 MB in the beginning and 1.2 GB in the end (delta: -215.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.07 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.00 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 230.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 19306.78 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 144.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 87.8 MB). Peak memory consumption was 231.9 MB. Max. memory is 11.5 GB. * Witness Printer took 92.83 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 20; [L11] CALL, EXPR id(input) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 20 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 19.2s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 181 SDtfs, 715 SDslu, 1213 SDs, 0 SdLazy, 1196 SolverSat, 175 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2227 GetRequests, 1642 SyntacticMatches, 0 SemanticMatches, 585 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 8.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 9.1s InterpolantComputationTime, 2760 NumberOfCodeBlocks, 2760 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2592 ConstructedInterpolants, 0 QuantifiedInterpolants, 567664 SizeOfPredicates, 211 NumberOfNonLiveVariables, 3116 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 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...