./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann03.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/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 33d0641b9a339cc7e30dea71c1d04be4d72dcf57 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 20:35:31,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 20:35:31,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 20:35:31,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 20:35:31,291 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 20:35:31,293 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 20:35:31,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 20:35:31,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 20:35:31,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 20:35:31,311 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 20:35:31,312 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 20:35:31,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 20:35:31,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 20:35:31,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 20:35:31,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 20:35:31,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 20:35:31,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 20:35:31,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 20:35:31,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 20:35:31,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 20:35:31,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 20:35:31,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 20:35:31,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 20:35:31,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 20:35:31,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 20:35:31,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 20:35:31,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 20:35:31,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 20:35:31,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 20:35:31,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 20:35:31,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 20:35:31,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 20:35:31,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 20:35:31,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 20:35:31,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 20:35:31,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 20:35:31,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 20:35:31,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 20:35:31,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 20:35:31,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 20:35:31,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 20:35:31,345 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 20:35:31,368 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 20:35:31,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 20:35:31,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 20:35:31,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 20:35:31,380 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 20:35:31,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 20:35:31,381 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 20:35:31,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 20:35:31,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 20:35:31,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 20:35:31,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 20:35:31,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 20:35:31,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 20:35:31,382 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 20:35:31,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 20:35:31,384 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 20:35:31,384 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 20:35:31,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 20:35:31,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 20:35:31,385 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 20:35:31,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 20:35:31,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 20:35:31,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 20:35:31,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 20:35:31,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 20:35:31,386 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 20:35:31,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 20:35:31,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 20:35:31,387 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_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/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 -> 33d0641b9a339cc7e30dea71c1d04be4d72dcf57 [2019-11-15 20:35:31,419 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 20:35:31,432 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 20:35:31,436 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 20:35:31,437 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 20:35:31,438 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 20:35:31,438 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/bin/uautomizer/../../sv-benchmarks/c/recursive/Ackermann03.c [2019-11-15 20:35:31,491 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/bin/uautomizer/data/c8be26614/49ec1e66a4e344989370bab25d1d867c/FLAG00994dd25 [2019-11-15 20:35:31,864 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 20:35:31,864 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/sv-benchmarks/c/recursive/Ackermann03.c [2019-11-15 20:35:31,870 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/bin/uautomizer/data/c8be26614/49ec1e66a4e344989370bab25d1d867c/FLAG00994dd25 [2019-11-15 20:35:32,292 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/bin/uautomizer/data/c8be26614/49ec1e66a4e344989370bab25d1d867c [2019-11-15 20:35:32,294 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 20:35:32,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 20:35:32,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 20:35:32,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 20:35:32,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 20:35:32,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 08:35:32" (1/1) ... [2019-11-15 20:35:32,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6136fe7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:35:32, skipping insertion in model container [2019-11-15 20:35:32,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 08:35:32" (1/1) ... [2019-11-15 20:35:32,312 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 20:35:32,325 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 20:35:32,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 20:35:32,523 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 20:35:32,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 20:35:32,558 INFO L192 MainTranslator]: Completed translation [2019-11-15 20:35:32,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:35:32 WrapperNode [2019-11-15 20:35:32,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 20:35:32,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 20:35:32,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 20:35:32,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 20:35:32,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:35:32" (1/1) ... [2019-11-15 20:35:32,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:35:32" (1/1) ... [2019-11-15 20:35:32,588 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 20:35:32,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 20:35:32,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 20:35:32,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 20:35:32,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:35:32" (1/1) ... [2019-11-15 20:35:32,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:35:32" (1/1) ... [2019-11-15 20:35:32,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:35:32" (1/1) ... [2019-11-15 20:35:32,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:35:32" (1/1) ... [2019-11-15 20:35:32,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:35:32" (1/1) ... [2019-11-15 20:35:32,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:35:32" (1/1) ... [2019-11-15 20:35:32,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:35:32" (1/1) ... [2019-11-15 20:35:32,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 20:35:32,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 20:35:32,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 20:35:32,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 20:35:32,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:35:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/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 [2019-11-15 20:35:32,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 20:35:32,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 20:35:32,683 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2019-11-15 20:35:32,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2019-11-15 20:35:32,946 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 20:35:32,946 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-15 20:35:32,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:35:32 BoogieIcfgContainer [2019-11-15 20:35:32,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 20:35:32,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 20:35:32,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 20:35:32,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 20:35:32,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 08:35:32" (1/3) ... [2019-11-15 20:35:32,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@faa460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 08:35:32, skipping insertion in model container [2019-11-15 20:35:32,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:35:32" (2/3) ... [2019-11-15 20:35:32,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@faa460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 08:35:32, skipping insertion in model container [2019-11-15 20:35:32,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:35:32" (3/3) ... [2019-11-15 20:35:32,959 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2019-11-15 20:35:32,968 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 20:35:32,975 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 20:35:32,985 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 20:35:33,014 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 20:35:33,014 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 20:35:33,014 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 20:35:33,014 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 20:35:33,014 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 20:35:33,015 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 20:35:33,015 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 20:35:33,016 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 20:35:33,038 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-15 20:35:33,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 20:35:33,043 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:35:33,044 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:35:33,045 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:35:33,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:35:33,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1260755674, now seen corresponding path program 1 times [2019-11-15 20:35:33,060 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:35:33,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255811214] [2019-11-15 20:35:33,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:33,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:33,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:35:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:35:33,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255811214] [2019-11-15 20:35:33,250 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:35:33,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 20:35:33,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915584452] [2019-11-15 20:35:33,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 20:35:33,254 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:35:33,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 20:35:33,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 20:35:33,267 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2019-11-15 20:35:33,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:35:33,410 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2019-11-15 20:35:33,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 20:35:33,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-15 20:35:33,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:35:33,419 INFO L225 Difference]: With dead ends: 50 [2019-11-15 20:35:33,419 INFO L226 Difference]: Without dead ends: 24 [2019-11-15 20:35:33,422 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 20:35:33,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-15 20:35:33,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-15 20:35:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-15 20:35:33,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-11-15 20:35:33,457 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 11 [2019-11-15 20:35:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:35:33,458 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-11-15 20:35:33,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 20:35:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-11-15 20:35:33,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-15 20:35:33,461 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:35:33,461 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:35:33,461 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:35:33,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:35:33,462 INFO L82 PathProgramCache]: Analyzing trace with hash 963920485, now seen corresponding path program 1 times [2019-11-15 20:35:33,462 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:35:33,462 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108495536] [2019-11-15 20:35:33,463 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:33,463 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:33,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:35:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 20:35:33,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108495536] [2019-11-15 20:35:33,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569667718] [2019-11-15 20:35:33,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/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 [2019-11-15 20:35:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:33,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 20:35:33,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:35:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 20:35:33,815 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:35:33,815 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-15 20:35:33,816 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989170430] [2019-11-15 20:35:33,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-15 20:35:33,818 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:35:33,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-15 20:35:33,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-15 20:35:33,820 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 11 states. [2019-11-15 20:35:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:35:34,056 INFO L93 Difference]: Finished difference Result 53 states and 82 transitions. [2019-11-15 20:35:34,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 20:35:34,057 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-11-15 20:35:34,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:35:34,059 INFO L225 Difference]: With dead ends: 53 [2019-11-15 20:35:34,059 INFO L226 Difference]: Without dead ends: 29 [2019-11-15 20:35:34,061 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2019-11-15 20:35:34,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-15 20:35:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-11-15 20:35:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 20:35:34,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2019-11-15 20:35:34,080 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 18 [2019-11-15 20:35:34,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:35:34,082 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2019-11-15 20:35:34,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-15 20:35:34,082 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2019-11-15 20:35:34,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-15 20:35:34,086 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:35:34,087 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:35:34,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:35:34,295 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:35:34,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:35:34,295 INFO L82 PathProgramCache]: Analyzing trace with hash 416247163, now seen corresponding path program 1 times [2019-11-15 20:35:34,295 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:35:34,295 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872389347] [2019-11-15 20:35:34,296 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:34,296 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:34,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:35:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-15 20:35:34,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872389347] [2019-11-15 20:35:34,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92756534] [2019-11-15 20:35:34,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/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 [2019-11-15 20:35:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:34,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 20:35:34,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:35:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-15 20:35:34,719 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:35:34,719 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-11-15 20:35:34,720 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354389798] [2019-11-15 20:35:34,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-15 20:35:34,720 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:35:34,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-15 20:35:34,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-11-15 20:35:34,721 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand 14 states. [2019-11-15 20:35:35,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:35:35,309 INFO L93 Difference]: Finished difference Result 83 states and 166 transitions. [2019-11-15 20:35:35,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-15 20:35:35,310 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-11-15 20:35:35,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:35:35,314 INFO L225 Difference]: With dead ends: 83 [2019-11-15 20:35:35,314 INFO L226 Difference]: Without dead ends: 57 [2019-11-15 20:35:35,317 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2019-11-15 20:35:35,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-15 20:35:35,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2019-11-15 20:35:35,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-15 20:35:35,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 75 transitions. [2019-11-15 20:35:35,357 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 75 transitions. Word has length 31 [2019-11-15 20:35:35,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:35:35,357 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 75 transitions. [2019-11-15 20:35:35,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-15 20:35:35,358 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 75 transitions. [2019-11-15 20:35:35,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-15 20:35:35,363 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:35:35,363 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:35:35,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:35:35,569 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:35:35,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:35:35,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1827824897, now seen corresponding path program 2 times [2019-11-15 20:35:35,569 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:35:35,569 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867980013] [2019-11-15 20:35:35,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:35,570 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:35,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:35:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-15 20:35:35,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867980013] [2019-11-15 20:35:35,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076451630] [2019-11-15 20:35:35,745 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/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 [2019-11-15 20:35:35,798 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 20:35:35,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:35:35,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-15 20:35:35,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:35:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-15 20:35:35,841 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:35:35,841 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2019-11-15 20:35:35,842 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244921689] [2019-11-15 20:35:35,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-15 20:35:35,843 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:35:35,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-15 20:35:35,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-15 20:35:35,843 INFO L87 Difference]: Start difference. First operand 49 states and 75 transitions. Second operand 9 states. [2019-11-15 20:35:35,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:35:35,958 INFO L93 Difference]: Finished difference Result 119 states and 226 transitions. [2019-11-15 20:35:35,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 20:35:35,959 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2019-11-15 20:35:35,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:35:35,961 INFO L225 Difference]: With dead ends: 119 [2019-11-15 20:35:35,961 INFO L226 Difference]: Without dead ends: 52 [2019-11-15 20:35:35,964 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-15 20:35:35,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-15 20:35:35,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-15 20:35:35,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-15 20:35:35,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 75 transitions. [2019-11-15 20:35:35,975 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 75 transitions. Word has length 44 [2019-11-15 20:35:35,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:35:35,976 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 75 transitions. [2019-11-15 20:35:35,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-15 20:35:35,976 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 75 transitions. [2019-11-15 20:35:35,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-15 20:35:35,983 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:35:35,983 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:35:36,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:35:36,187 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:35:36,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:35:36,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1207723706, now seen corresponding path program 3 times [2019-11-15 20:35:36,188 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:35:36,188 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134917148] [2019-11-15 20:35:36,188 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:36,189 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:36,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:35:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 101 proven. 59 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-15 20:35:36,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134917148] [2019-11-15 20:35:36,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968023539] [2019-11-15 20:35:36,544 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/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 [2019-11-15 20:35:36,604 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-15 20:35:36,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:35:36,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-15 20:35:36,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:35:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 98 proven. 19 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-11-15 20:35:36,680 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:35:36,680 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 18 [2019-11-15 20:35:36,681 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187121425] [2019-11-15 20:35:36,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-15 20:35:36,684 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:35:36,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-15 20:35:36,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2019-11-15 20:35:36,684 INFO L87 Difference]: Start difference. First operand 52 states and 75 transitions. Second operand 18 states. [2019-11-15 20:35:37,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:35:37,289 INFO L93 Difference]: Finished difference Result 118 states and 221 transitions. [2019-11-15 20:35:37,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-15 20:35:37,289 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2019-11-15 20:35:37,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:35:37,292 INFO L225 Difference]: With dead ends: 118 [2019-11-15 20:35:37,292 INFO L226 Difference]: Without dead ends: 70 [2019-11-15 20:35:37,294 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2019-11-15 20:35:37,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-15 20:35:37,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2019-11-15 20:35:37,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-15 20:35:37,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2019-11-15 20:35:37,306 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 78 [2019-11-15 20:35:37,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:35:37,306 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2019-11-15 20:35:37,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-15 20:35:37,306 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2019-11-15 20:35:37,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-15 20:35:37,311 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:35:37,311 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:35:37,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:35:37,514 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:35:37,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:35:37,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1388181292, now seen corresponding path program 4 times [2019-11-15 20:35:37,515 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:35:37,515 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555351436] [2019-11-15 20:35:37,515 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:37,515 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:37,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:35:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 163 proven. 147 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-11-15 20:35:37,894 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555351436] [2019-11-15 20:35:37,894 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183067217] [2019-11-15 20:35:37,894 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/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 [2019-11-15 20:35:37,969 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 20:35:37,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:35:37,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-15 20:35:37,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:35:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 190 proven. 71 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-15 20:35:38,045 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:35:38,045 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 18 [2019-11-15 20:35:38,045 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233707826] [2019-11-15 20:35:38,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-15 20:35:38,047 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:35:38,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-15 20:35:38,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-11-15 20:35:38,048 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 18 states. [2019-11-15 20:35:38,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:35:38,878 INFO L93 Difference]: Finished difference Result 118 states and 205 transitions. [2019-11-15 20:35:38,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-15 20:35:38,879 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 104 [2019-11-15 20:35:38,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:35:38,881 INFO L225 Difference]: With dead ends: 118 [2019-11-15 20:35:38,881 INFO L226 Difference]: Without dead ends: 63 [2019-11-15 20:35:38,883 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=356, Invalid=1366, Unknown=0, NotChecked=0, Total=1722 [2019-11-15 20:35:38,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-15 20:35:38,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2019-11-15 20:35:38,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-15 20:35:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 77 transitions. [2019-11-15 20:35:38,903 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 77 transitions. Word has length 104 [2019-11-15 20:35:38,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:35:38,905 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 77 transitions. [2019-11-15 20:35:38,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-15 20:35:38,905 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 77 transitions. [2019-11-15 20:35:38,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-11-15 20:35:38,910 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:35:38,911 INFO L380 BasicCegarLoop]: trace histogram [31, 31, 18, 13, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:35:39,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:35:39,114 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:35:39,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:35:39,115 INFO L82 PathProgramCache]: Analyzing trace with hash -264474522, now seen corresponding path program 5 times [2019-11-15 20:35:39,115 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:35:39,115 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282584135] [2019-11-15 20:35:39,115 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:39,115 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:39,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:35:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 572 proven. 836 refuted. 0 times theorem prover too weak. 899 trivial. 0 not checked. [2019-11-15 20:35:40,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282584135] [2019-11-15 20:35:40,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056075435] [2019-11-15 20:35:40,383 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/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 [2019-11-15 20:35:40,486 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-15 20:35:40,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:35:40,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-15 20:35:40,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:35:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 456 proven. 558 refuted. 0 times theorem prover too weak. 1293 trivial. 0 not checked. [2019-11-15 20:35:41,144 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:35:41,144 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 19] total 49 [2019-11-15 20:35:41,147 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105134007] [2019-11-15 20:35:41,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-15 20:35:41,149 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:35:41,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-15 20:35:41,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2194, Unknown=0, NotChecked=0, Total=2352 [2019-11-15 20:35:41,151 INFO L87 Difference]: Start difference. First operand 56 states and 77 transitions. Second operand 49 states. [2019-11-15 20:35:46,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:35:46,976 INFO L93 Difference]: Finished difference Result 226 states and 439 transitions. [2019-11-15 20:35:46,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2019-11-15 20:35:46,976 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 209 [2019-11-15 20:35:46,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:35:46,980 INFO L225 Difference]: With dead ends: 226 [2019-11-15 20:35:46,980 INFO L226 Difference]: Without dead ends: 164 [2019-11-15 20:35:46,992 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6880 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2744, Invalid=19012, Unknown=0, NotChecked=0, Total=21756 [2019-11-15 20:35:46,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-15 20:35:47,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 85. [2019-11-15 20:35:47,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-15 20:35:47,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 113 transitions. [2019-11-15 20:35:47,025 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 113 transitions. Word has length 209 [2019-11-15 20:35:47,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:35:47,025 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 113 transitions. [2019-11-15 20:35:47,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-15 20:35:47,026 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 113 transitions. [2019-11-15 20:35:47,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-15 20:35:47,028 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:35:47,028 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:35:47,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:35:47,232 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:35:47,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:35:47,233 INFO L82 PathProgramCache]: Analyzing trace with hash -437561620, now seen corresponding path program 6 times [2019-11-15 20:35:47,233 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:35:47,233 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073060402] [2019-11-15 20:35:47,233 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:47,233 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:47,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:35:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 446 proven. 274 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2019-11-15 20:35:47,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073060402] [2019-11-15 20:35:47,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778936897] [2019-11-15 20:35:47,843 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/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 [2019-11-15 20:35:47,952 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-15 20:35:47,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:35:47,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-15 20:35:47,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:35:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2019-11-15 20:35:48,049 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:35:48,049 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 24 [2019-11-15 20:35:48,050 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178304739] [2019-11-15 20:35:48,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-15 20:35:48,051 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:35:48,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-15 20:35:48,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2019-11-15 20:35:48,052 INFO L87 Difference]: Start difference. First operand 85 states and 113 transitions. Second operand 24 states. [2019-11-15 20:35:49,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:35:49,203 INFO L93 Difference]: Finished difference Result 217 states and 324 transitions. [2019-11-15 20:35:49,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-15 20:35:49,204 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 156 [2019-11-15 20:35:49,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:35:49,206 INFO L225 Difference]: With dead ends: 217 [2019-11-15 20:35:49,206 INFO L226 Difference]: Without dead ends: 136 [2019-11-15 20:35:49,210 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=745, Invalid=3677, Unknown=0, NotChecked=0, Total=4422 [2019-11-15 20:35:49,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-11-15 20:35:49,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 90. [2019-11-15 20:35:49,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-15 20:35:49,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 122 transitions. [2019-11-15 20:35:49,222 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 122 transitions. Word has length 156 [2019-11-15 20:35:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:35:49,223 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 122 transitions. [2019-11-15 20:35:49,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-15 20:35:49,223 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 122 transitions. [2019-11-15 20:35:49,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-11-15 20:35:49,225 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:35:49,226 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:35:49,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:35:49,437 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:35:49,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:35:49,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1290632534, now seen corresponding path program 7 times [2019-11-15 20:35:49,438 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:35:49,438 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060207806] [2019-11-15 20:35:49,438 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:49,438 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:49,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:35:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 422 proven. 622 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2019-11-15 20:35:50,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060207806] [2019-11-15 20:35:50,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468164275] [2019-11-15 20:35:50,149 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/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 [2019-11-15 20:35:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:50,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-15 20:35:50,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:35:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 1016 proven. 196 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-11-15 20:35:50,334 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:35:50,334 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16] total 25 [2019-11-15 20:35:50,334 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117289814] [2019-11-15 20:35:50,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-15 20:35:50,335 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:35:50,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-15 20:35:50,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2019-11-15 20:35:50,336 INFO L87 Difference]: Start difference. First operand 90 states and 122 transitions. Second operand 25 states. [2019-11-15 20:35:51,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:35:51,537 INFO L93 Difference]: Finished difference Result 265 states and 457 transitions. [2019-11-15 20:35:51,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-15 20:35:51,537 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 182 [2019-11-15 20:35:51,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:35:51,540 INFO L225 Difference]: With dead ends: 265 [2019-11-15 20:35:51,540 INFO L226 Difference]: Without dead ends: 164 [2019-11-15 20:35:51,543 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=569, Invalid=2293, Unknown=0, NotChecked=0, Total=2862 [2019-11-15 20:35:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-15 20:35:51,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 126. [2019-11-15 20:35:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-15 20:35:51,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 176 transitions. [2019-11-15 20:35:51,568 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 176 transitions. Word has length 182 [2019-11-15 20:35:51,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:35:51,568 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 176 transitions. [2019-11-15 20:35:51,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-15 20:35:51,568 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 176 transitions. [2019-11-15 20:35:51,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-15 20:35:51,571 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:35:51,572 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:35:51,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:35:51,775 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:35:51,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:35:51,775 INFO L82 PathProgramCache]: Analyzing trace with hash -628615374, now seen corresponding path program 8 times [2019-11-15 20:35:51,775 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:35:51,775 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361945388] [2019-11-15 20:35:51,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:51,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:51,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:35:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 163 proven. 419 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2019-11-15 20:35:52,110 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361945388] [2019-11-15 20:35:52,110 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401774836] [2019-11-15 20:35:52,110 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/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 [2019-11-15 20:35:52,214 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 20:35:52,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:35:52,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-15 20:35:52,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:35:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 715 proven. 114 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2019-11-15 20:35:52,277 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:35:52,278 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 18 [2019-11-15 20:35:52,278 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435076642] [2019-11-15 20:35:52,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-15 20:35:52,280 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:35:52,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-15 20:35:52,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-11-15 20:35:52,280 INFO L87 Difference]: Start difference. First operand 126 states and 176 transitions. Second operand 18 states. [2019-11-15 20:35:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:35:52,924 INFO L93 Difference]: Finished difference Result 255 states and 388 transitions. [2019-11-15 20:35:52,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-15 20:35:52,924 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 156 [2019-11-15 20:35:52,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:35:52,926 INFO L225 Difference]: With dead ends: 255 [2019-11-15 20:35:52,927 INFO L226 Difference]: Without dead ends: 126 [2019-11-15 20:35:52,929 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2019-11-15 20:35:52,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-15 20:35:52,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2019-11-15 20:35:52,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-15 20:35:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 163 transitions. [2019-11-15 20:35:52,945 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 163 transitions. Word has length 156 [2019-11-15 20:35:52,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:35:52,945 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 163 transitions. [2019-11-15 20:35:52,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-15 20:35:52,946 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 163 transitions. [2019-11-15 20:35:52,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-15 20:35:52,948 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:35:52,949 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:35:53,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:35:53,160 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:35:53,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:35:53,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1768194034, now seen corresponding path program 9 times [2019-11-15 20:35:53,160 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:35:53,160 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290108957] [2019-11-15 20:35:53,161 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:53,161 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:53,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:35:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 360 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2019-11-15 20:35:53,756 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290108957] [2019-11-15 20:35:53,756 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550478224] [2019-11-15 20:35:53,756 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/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 [2019-11-15 20:35:53,887 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-15 20:35:53,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:35:53,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-15 20:35:53,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:35:53,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2019-11-15 20:35:53,981 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:35:53,981 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 25 [2019-11-15 20:35:53,981 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528336492] [2019-11-15 20:35:53,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-15 20:35:53,983 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:35:53,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-15 20:35:53,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2019-11-15 20:35:53,984 INFO L87 Difference]: Start difference. First operand 122 states and 163 transitions. Second operand 25 states. [2019-11-15 20:35:55,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:35:55,125 INFO L93 Difference]: Finished difference Result 279 states and 415 transitions. [2019-11-15 20:35:55,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-15 20:35:55,125 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 169 [2019-11-15 20:35:55,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:35:55,128 INFO L225 Difference]: With dead ends: 279 [2019-11-15 20:35:55,128 INFO L226 Difference]: Without dead ends: 161 [2019-11-15 20:35:55,131 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=670, Invalid=3236, Unknown=0, NotChecked=0, Total=3906 [2019-11-15 20:35:55,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-15 20:35:55,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 129. [2019-11-15 20:35:55,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-11-15 20:35:55,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 176 transitions. [2019-11-15 20:35:55,143 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 176 transitions. Word has length 169 [2019-11-15 20:35:55,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:35:55,144 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 176 transitions. [2019-11-15 20:35:55,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-15 20:35:55,144 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 176 transitions. [2019-11-15 20:35:55,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-11-15 20:35:55,147 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:35:55,147 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:35:55,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:35:55,359 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:35:55,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:35:55,359 INFO L82 PathProgramCache]: Analyzing trace with hash -728546296, now seen corresponding path program 10 times [2019-11-15 20:35:55,359 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:35:55,359 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129752032] [2019-11-15 20:35:55,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:55,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:55,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:35:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 600 proven. 156 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2019-11-15 20:35:56,177 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129752032] [2019-11-15 20:35:56,177 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505314581] [2019-11-15 20:35:56,177 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/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 [2019-11-15 20:35:56,336 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 20:35:56,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:35:56,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 79 conjunts are in the unsatisfiable core [2019-11-15 20:35:56,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:35:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2019-11-15 20:35:56,539 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:35:56,539 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 25 [2019-11-15 20:35:56,539 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923079545] [2019-11-15 20:35:56,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-15 20:35:56,540 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:35:56,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-15 20:35:56,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2019-11-15 20:35:56,541 INFO L87 Difference]: Start difference. First operand 129 states and 176 transitions. Second operand 25 states. [2019-11-15 20:35:58,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:35:58,222 INFO L93 Difference]: Finished difference Result 236 states and 348 transitions. [2019-11-15 20:35:58,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-15 20:35:58,222 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 182 [2019-11-15 20:35:58,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:35:58,225 INFO L225 Difference]: With dead ends: 236 [2019-11-15 20:35:58,225 INFO L226 Difference]: Without dead ends: 216 [2019-11-15 20:35:58,228 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 234 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=256, Invalid=2714, Unknown=0, NotChecked=0, Total=2970 [2019-11-15 20:35:58,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-11-15 20:35:58,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 170. [2019-11-15 20:35:58,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-11-15 20:35:58,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 245 transitions. [2019-11-15 20:35:58,248 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 245 transitions. Word has length 182 [2019-11-15 20:35:58,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:35:58,251 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 245 transitions. [2019-11-15 20:35:58,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-15 20:35:58,251 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 245 transitions. [2019-11-15 20:35:58,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-11-15 20:35:58,254 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:35:58,254 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 16, 13, 12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:35:58,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:35:58,458 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:35:58,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:35:58,458 INFO L82 PathProgramCache]: Analyzing trace with hash -215902222, now seen corresponding path program 11 times [2019-11-15 20:35:58,458 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:35:58,458 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250133335] [2019-11-15 20:35:58,459 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:58,459 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:35:58,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:35:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:35:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 665 proven. 517 refuted. 0 times theorem prover too weak. 838 trivial. 0 not checked. [2019-11-15 20:35:59,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250133335] [2019-11-15 20:35:59,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235993772] [2019-11-15 20:35:59,183 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/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 [2019-11-15 20:35:59,319 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-15 20:35:59,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:35:59,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 77 conjunts are in the unsatisfiable core [2019-11-15 20:35:59,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:35:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 535 proven. 596 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2019-11-15 20:35:59,878 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:35:59,878 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 44 [2019-11-15 20:35:59,878 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792860253] [2019-11-15 20:35:59,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-15 20:35:59,880 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:35:59,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-15 20:35:59,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1711, Unknown=0, NotChecked=0, Total=1892 [2019-11-15 20:35:59,882 INFO L87 Difference]: Start difference. First operand 170 states and 245 transitions. Second operand 44 states. [2019-11-15 20:36:02,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:36:02,078 INFO L93 Difference]: Finished difference Result 424 states and 846 transitions. [2019-11-15 20:36:02,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-15 20:36:02,078 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 195 [2019-11-15 20:36:02,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:36:02,082 INFO L225 Difference]: With dead ends: 424 [2019-11-15 20:36:02,082 INFO L226 Difference]: Without dead ends: 248 [2019-11-15 20:36:02,088 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2430 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=942, Invalid=6540, Unknown=0, NotChecked=0, Total=7482 [2019-11-15 20:36:02,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-11-15 20:36:02,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 228. [2019-11-15 20:36:02,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-11-15 20:36:02,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 358 transitions. [2019-11-15 20:36:02,110 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 358 transitions. Word has length 195 [2019-11-15 20:36:02,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:36:02,110 INFO L462 AbstractCegarLoop]: Abstraction has 228 states and 358 transitions. [2019-11-15 20:36:02,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-15 20:36:02,111 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 358 transitions. [2019-11-15 20:36:02,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2019-11-15 20:36:02,116 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:36:02,116 INFO L380 BasicCegarLoop]: trace histogram [47, 47, 27, 20, 19, 19, 19, 19, 19, 19, 19, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:36:02,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:36:02,320 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:36:02,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:36:02,320 INFO L82 PathProgramCache]: Analyzing trace with hash -2016942064, now seen corresponding path program 12 times [2019-11-15 20:36:02,320 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:36:02,320 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054650985] [2019-11-15 20:36:02,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:36:02,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:36:02,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:36:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:02,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5415 backedges. 1693 proven. 1314 refuted. 0 times theorem prover too weak. 2408 trivial. 0 not checked. [2019-11-15 20:36:03,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054650985] [2019-11-15 20:36:03,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25837958] [2019-11-15 20:36:03,374 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/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 [2019-11-15 20:36:03,516 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-15 20:36:03,516 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:36:03,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-15 20:36:03,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:36:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5415 backedges. 1928 proven. 41 refuted. 0 times theorem prover too weak. 3446 trivial. 0 not checked. [2019-11-15 20:36:03,634 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:36:03,634 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 21 [2019-11-15 20:36:03,635 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016014040] [2019-11-15 20:36:03,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-15 20:36:03,636 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:36:03,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-15 20:36:03,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2019-11-15 20:36:03,636 INFO L87 Difference]: Start difference. First operand 228 states and 358 transitions. Second operand 21 states. [2019-11-15 20:36:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:36:04,131 INFO L93 Difference]: Finished difference Result 531 states and 1173 transitions. [2019-11-15 20:36:04,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-15 20:36:04,133 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 314 [2019-11-15 20:36:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:36:04,139 INFO L225 Difference]: With dead ends: 531 [2019-11-15 20:36:04,140 INFO L226 Difference]: Without dead ends: 302 [2019-11-15 20:36:04,145 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2019-11-15 20:36:04,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2019-11-15 20:36:04,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 278. [2019-11-15 20:36:04,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-15 20:36:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 484 transitions. [2019-11-15 20:36:04,173 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 484 transitions. Word has length 314 [2019-11-15 20:36:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:36:04,173 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 484 transitions. [2019-11-15 20:36:04,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-15 20:36:04,174 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 484 transitions. [2019-11-15 20:36:04,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2019-11-15 20:36:04,179 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:36:04,179 INFO L380 BasicCegarLoop]: trace histogram [42, 42, 23, 19, 18, 18, 18, 18, 18, 18, 18, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:36:04,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:36:04,389 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:36:04,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:36:04,389 INFO L82 PathProgramCache]: Analyzing trace with hash -261718049, now seen corresponding path program 13 times [2019-11-15 20:36:04,389 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:36:04,389 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190649105] [2019-11-15 20:36:04,390 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:36:04,390 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:36:04,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:36:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 1521 proven. 761 refuted. 0 times theorem prover too weak. 2047 trivial. 0 not checked. [2019-11-15 20:36:05,491 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190649105] [2019-11-15 20:36:05,491 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635632915] [2019-11-15 20:36:05,492 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/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 [2019-11-15 20:36:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:05,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-15 20:36:05,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:36:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 507 refuted. 0 times theorem prover too weak. 3588 trivial. 0 not checked. [2019-11-15 20:36:05,861 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:36:05,861 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 8] total 38 [2019-11-15 20:36:05,861 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613241558] [2019-11-15 20:36:05,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-15 20:36:05,862 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:36:05,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-15 20:36:05,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2019-11-15 20:36:05,863 INFO L87 Difference]: Start difference. First operand 278 states and 484 transitions. Second operand 38 states. [2019-11-15 20:36:07,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:36:07,823 INFO L93 Difference]: Finished difference Result 576 states and 1264 transitions. [2019-11-15 20:36:07,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-11-15 20:36:07,825 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 280 [2019-11-15 20:36:07,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:36:07,832 INFO L225 Difference]: With dead ends: 576 [2019-11-15 20:36:07,832 INFO L226 Difference]: Without dead ends: 313 [2019-11-15 20:36:07,840 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1330, Invalid=6502, Unknown=0, NotChecked=0, Total=7832 [2019-11-15 20:36:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2019-11-15 20:36:07,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 284. [2019-11-15 20:36:07,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2019-11-15 20:36:07,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 402 transitions. [2019-11-15 20:36:07,862 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 402 transitions. Word has length 280 [2019-11-15 20:36:07,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:36:07,863 INFO L462 AbstractCegarLoop]: Abstraction has 284 states and 402 transitions. [2019-11-15 20:36:07,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-15 20:36:07,863 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 402 transitions. [2019-11-15 20:36:07,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2019-11-15 20:36:07,868 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:36:07,868 INFO L380 BasicCegarLoop]: trace histogram [93, 93, 51, 42, 41, 41, 41, 41, 41, 41, 41, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:36:08,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:36:08,072 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:36:08,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:36:08,073 INFO L82 PathProgramCache]: Analyzing trace with hash 571176944, now seen corresponding path program 14 times [2019-11-15 20:36:08,073 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:36:08,073 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293899340] [2019-11-15 20:36:08,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:36:08,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:36:08,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:36:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:11,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:36:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 21757 backedges. 7102 proven. 4387 refuted. 0 times theorem prover too weak. 10268 trivial. 0 not checked. [2019-11-15 20:36:12,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293899340] [2019-11-15 20:36:12,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787847639] [2019-11-15 20:36:12,327 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/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 [2019-11-15 20:36:12,571 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 20:36:12,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:36:12,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-15 20:36:12,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:36:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 21757 backedges. 1419 proven. 2525 refuted. 0 times theorem prover too weak. 17813 trivial. 0 not checked. [2019-11-15 20:36:13,094 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:36:13,095 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 8] total 70 [2019-11-15 20:36:13,095 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233187984] [2019-11-15 20:36:13,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-11-15 20:36:13,097 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:36:13,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-11-15 20:36:13,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=4438, Unknown=0, NotChecked=0, Total=4830 [2019-11-15 20:36:13,098 INFO L87 Difference]: Start difference. First operand 284 states and 402 transitions. Second operand 70 states. [2019-11-15 20:36:24,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:36:24,023 INFO L93 Difference]: Finished difference Result 930 states and 2222 transitions. [2019-11-15 20:36:24,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2019-11-15 20:36:24,023 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 614 [2019-11-15 20:36:24,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:36:24,024 INFO L225 Difference]: With dead ends: 930 [2019-11-15 20:36:24,025 INFO L226 Difference]: Without dead ends: 0 [2019-11-15 20:36:24,040 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 1087 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27974 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=8929, Invalid=72581, Unknown=0, NotChecked=0, Total=81510 [2019-11-15 20:36:24,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-15 20:36:24,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-15 20:36:24,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-15 20:36:24,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-15 20:36:24,041 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 614 [2019-11-15 20:36:24,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:36:24,042 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-15 20:36:24,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-11-15 20:36:24,042 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-15 20:36:24,042 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-15 20:36:24,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:36:24,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-15 20:36:24,798 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 98 [2019-11-15 20:36:24,902 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 87 [2019-11-15 20:36:25,030 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 117 [2019-11-15 20:36:25,284 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 131 [2019-11-15 20:36:25,449 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 92 [2019-11-15 20:36:25,558 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 92 [2019-11-15 20:36:25,799 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 124 [2019-11-15 20:36:26,054 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 92 [2019-11-15 20:36:26,408 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 176 [2019-11-15 20:36:26,630 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 114 [2019-11-15 20:36:27,135 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 114 [2019-11-15 20:36:28,377 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 157 [2019-11-15 20:36:28,984 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 114 [2019-11-15 20:36:29,114 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 114 [2019-11-15 20:36:31,052 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 114 [2019-11-15 20:36:32,164 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 114 [2019-11-15 20:36:33,084 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 112 [2019-11-15 20:36:33,196 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 112 [2019-11-15 20:36:33,313 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 121 [2019-11-15 20:36:35,445 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 114 [2019-11-15 20:36:35,862 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 139 [2019-11-15 20:36:37,691 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 114 [2019-11-15 20:36:37,796 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 117 [2019-11-15 20:36:38,662 WARN L191 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 21 [2019-11-15 20:36:43,509 WARN L191 SmtUtils]: Spent 4.81 s on a formula simplification. DAG size of input: 556 DAG size of output: 93 [2019-11-15 20:36:43,730 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 9 [2019-11-15 20:36:43,859 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 1 [2019-11-15 20:36:43,860 INFO L443 ceAbstractionStarter]: For program point L33(lines 33 38) no Hoare annotation was computed. [2019-11-15 20:36:43,860 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-15 20:36:43,861 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-15 20:36:43,861 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-15 20:36:43,861 INFO L443 ceAbstractionStarter]: For program point L27(lines 27 31) no Hoare annotation was computed. [2019-11-15 20:36:43,861 INFO L446 ceAbstractionStarter]: At program point L25(lines 25 45) the Hoare annotation is: true [2019-11-15 20:36:43,861 INFO L443 ceAbstractionStarter]: For program point L43(line 43) no Hoare annotation was computed. [2019-11-15 20:36:43,861 INFO L443 ceAbstractionStarter]: For program point L40(lines 40 44) no Hoare annotation was computed. [2019-11-15 20:36:43,861 INFO L446 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: true [2019-11-15 20:36:43,861 INFO L443 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed. [2019-11-15 20:36:43,862 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2019-11-15 20:36:43,862 INFO L443 ceAbstractionStarter]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2019-11-15 20:36:43,863 INFO L446 ceAbstractionStarter]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2019-11-15 20:36:43,863 INFO L439 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (not (= |ackermann_#in~n| 0)) (or (not (<= 1 |ackermann_#in~n|)) (not (<= |ackermann_#in~n| (+ (* 2 |ackermann_#in~m|) 1))) (<= 1 ackermann_~m))) [2019-11-15 20:36:43,863 INFO L443 ceAbstractionStarter]: For program point L21-1(line 21) no Hoare annotation was computed. [2019-11-15 20:36:43,863 INFO L439 ceAbstractionStarter]: At program point L19(line 19) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2019-11-15 20:36:43,863 INFO L439 ceAbstractionStarter]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse9 (<= 3 ackermann_~m)) (.cse7 (not (<= 2 |ackermann_#in~m|))) (.cse8 (<= 2 |ackermann_#in~n|)) (.cse2 (<= 1 |ackermann_#in~n|)) (.cse5 (<= 9 |ackermann_#t~ret1|)) (.cse3 (<= |ackermann_#in~n| 1)) (.cse10 (<= |ackermann_#t~ret1| 3)) (.cse6 (<= 4 |ackermann_#in~n|)) (.cse1 (<= 7 |ackermann_#t~ret1|)) (.cse12 (not (<= |ackermann_#in~m| 1))) (.cse13 (not (<= 1 |ackermann_#in~m|))) (.cse0 (<= 3 |ackermann_#in~n|)) (.cse4 (<= |ackermann_#in~n| 2)) (.cse11 (= ackermann_~n |ackermann_#in~n|))) (and (or (and .cse0 (<= (+ |ackermann_#in~n| ackermann_~m) 5) .cse1) (and (<= 3 |ackermann_#t~ret1|) .cse2 .cse3) (and (= |ackermann_#t~ret1| 5) .cse4 (<= ackermann_~m 2)) (and .cse5 .cse6) .cse7 (and .cse8 .cse9 .cse5)) (= ackermann_~m |ackermann_#in~m|) (or (not (<= |ackermann_#in~m| 0)) (= |ackermann_#in~m| 0)) (or .cse9 .cse7 .cse8 .cse10) .cse11 (or .cse12 .cse13 (and .cse2 (<= (* 3 ackermann_~m) (+ |ackermann_#t~ret1| 1)) (<= |ackermann_#t~ret1| 2)) (not .cse3)) (or .cse12 .cse13 (<= |ackermann_#t~ret1| 6) (<= 6 |ackermann_#in~n|)) (let ((.cse15 (let ((.cse16 (* 6 ackermann_~m)) (.cse17 (<= 1 ackermann_~m))) (or (and (<= .cse16 (+ |ackermann_#t~ret1| 3)) .cse4 .cse11 .cse17) (and .cse11 (<= .cse16 (+ |ackermann_#t~ret1| 2)) (<= ackermann_~m 1) .cse17))))) (let ((.cse14 (and .cse0 (or (and .cse15 (<= 5 |ackermann_#t~ret1|)) (and .cse15 (<= |ackermann_#in~n| 3)))))) (or .cse5 (and .cse14 (<= |ackermann_#t~ret1| 4)) .cse3 (and .cse15 .cse10) (and (<= |ackermann_#in~n| 4) (<= |ackermann_#t~ret1| 5) .cse14 .cse6) (and .cse1 (<= |ackermann_#in~n| 6)) .cse12 (and (<= 8 |ackermann_#t~ret1|) (<= |ackermann_#in~n| 7)) .cse13 (and (<= |ackermann_#in~n| 5) (<= 5 |ackermann_#in~n|) (<= 6 |ackermann_#t~ret1|))))))) [2019-11-15 20:36:43,863 INFO L443 ceAbstractionStarter]: For program point L18(lines 18 20) no Hoare annotation was computed. [2019-11-15 20:36:43,863 INFO L443 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2019-11-15 20:36:43,863 INFO L443 ceAbstractionStarter]: For program point L21-3(line 21) no Hoare annotation was computed. [2019-11-15 20:36:43,863 INFO L443 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-11-15 20:36:43,863 INFO L443 ceAbstractionStarter]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2019-11-15 20:36:43,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 08:36:43 BoogieIcfgContainer [2019-11-15 20:36:43,870 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 20:36:43,870 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 20:36:43,871 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 20:36:43,871 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 20:36:43,871 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:35:32" (3/4) ... [2019-11-15 20:36:43,873 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-15 20:36:43,878 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2019-11-15 20:36:43,887 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-15 20:36:43,887 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-15 20:36:43,934 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f5a816c2-b9cf-4e78-9ff2-95eff82f61b8/bin/uautomizer/witness.graphml [2019-11-15 20:36:43,934 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 20:36:43,935 INFO L168 Benchmark]: Toolchain (without parser) took 71640.23 ms. Allocated memory was 1.0 GB in the beginning and 2.7 GB in the end (delta: 1.6 GB). Free memory was 951.4 MB in the beginning and 944.6 MB in the end (delta: 6.8 MB). Peak memory consumption was 1.7 GB. Max. memory is 11.5 GB. [2019-11-15 20:36:43,936 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 20:36:43,936 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.08 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -159.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-15 20:36:43,936 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.30 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 20:36:43,936 INFO L168 Benchmark]: Boogie Preprocessor took 29.00 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 20:36:43,937 INFO L168 Benchmark]: RCFGBuilder took 331.40 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-15 20:36:43,937 INFO L168 Benchmark]: TraceAbstraction took 70920.61 ms. Allocated memory was 1.1 GB in the beginning and 2.7 GB in the end (delta: 1.5 GB). Free memory was 1.1 GB in the beginning and 956.7 MB in the end (delta: 130.8 MB). Peak memory consumption was 1.8 GB. Max. memory is 11.5 GB. [2019-11-15 20:36:43,938 INFO L168 Benchmark]: Witness Printer took 63.72 ms. Allocated memory is still 2.7 GB. Free memory was 956.7 MB in the beginning and 944.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 11.5 GB. [2019-11-15 20:36:43,939 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 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 263.08 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -159.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.30 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.00 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 331.40 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 23.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 70920.61 ms. Allocated memory was 1.1 GB in the beginning and 2.7 GB in the end (delta: 1.5 GB). Free memory was 1.1 GB in the beginning and 956.7 MB in the end (delta: 130.8 MB). Peak memory consumption was 1.8 GB. Max. memory is 11.5 GB. * Witness Printer took 63.72 ms. Allocated memory is still 2.7 GB. Free memory was 956.7 MB in the beginning and 944.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Result: SAFE, OverallTime: 70.8s, OverallIterations: 16, TraceHistogramMax: 93, AutomataDifference: 29.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 19.6s, HoareTripleCheckerStatistics: 489 SDtfs, 1503 SDslu, 3634 SDs, 0 SdLazy, 18024 SolverSat, 5841 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4596 GetRequests, 3563 SyntacticMatches, 7 SemanticMatches, 1026 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43052 ImplicationChecksByTransitivity, 23.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=284occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 354 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 1662 PreInvPairs, 10433 NumberOfFragments, 425 HoareAnnotationTreeSize, 1662 FomulaSimplifications, 6075589 FormulaSimplificationTreeSizeReduction, 14.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 234192 FormulaSimplificationTreeSizeReductionInter, 5.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 14.6s InterpolantComputationTime, 5475 NumberOfCodeBlocks, 5166 NumberOfCodeBlocksAsserted, 111 NumberOfCheckSat, 5444 ConstructedInterpolants, 0 QuantifiedInterpolants, 2917220 SizeOfPredicates, 119 NumberOfNonLiveVariables, 7170 ConjunctsInSsa, 403 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 72938/88308 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...