./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_25x0-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_25x0-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2d8f12063511b3e3f39f22e34c8c81c8d42f35e2 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 20:04:50,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:04:50,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:04:50,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:04:50,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:04:50,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:04:50,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:04:50,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:04:50,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:04:50,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:04:50,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:04:50,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:04:50,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:04:50,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:04:50,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:04:50,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:04:50,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:04:50,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:04:50,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:04:50,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:04:50,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:04:50,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:04:50,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:04:50,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:04:50,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:04:50,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:04:50,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:04:50,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:04:50,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:04:50,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:04:50,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:04:50,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:04:50,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:04:50,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:04:50,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:04:50,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:04:50,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:04:50,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:04:50,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:04:50,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:04:50,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:04:50,422 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 20:04:50,474 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:04:50,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:04:50,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:04:50,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:04:50,477 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:04:50,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:04:50,478 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:04:50,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:04:50,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:04:50,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:04:50,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 20:04:50,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:04:50,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 20:04:50,481 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:04:50,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:04:50,481 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:04:50,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 20:04:50,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:04:50,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:04:50,482 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:04:50,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:04:50,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:04:50,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:04:50,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:04:50,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 20:04:50,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:04:50,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 20:04:50,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 20:04:50,485 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:04:50,485 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d8f12063511b3e3f39f22e34c8c81c8d42f35e2 [2020-11-29 20:04:50,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:04:50,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:04:50,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:04:50,813 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:04:50,814 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:04:50,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_25x0-2.c [2020-11-29 20:04:50,900 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/data/ff1bf8660/b63b6e0ebc9047e8b80982af925dbabf/FLAG5757661e2 [2020-11-29 20:04:51,445 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:04:51,446 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/sv-benchmarks/c/recursive-simple/sum_25x0-2.c [2020-11-29 20:04:51,452 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/data/ff1bf8660/b63b6e0ebc9047e8b80982af925dbabf/FLAG5757661e2 [2020-11-29 20:04:51,824 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/data/ff1bf8660/b63b6e0ebc9047e8b80982af925dbabf [2020-11-29 20:04:51,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:04:51,831 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:04:51,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:04:51,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:04:51,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:04:51,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:04:51" (1/1) ... [2020-11-29 20:04:51,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b58abc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:51, skipping insertion in model container [2020-11-29 20:04:51,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:04:51" (1/1) ... [2020-11-29 20:04:51,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:04:51,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:04:52,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:04:52,133 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:04:52,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:04:52,171 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:04:52,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:52 WrapperNode [2020-11-29 20:04:52,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:04:52,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:04:52,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:04:52,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:04:52,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:52" (1/1) ... [2020-11-29 20:04:52,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:52" (1/1) ... [2020-11-29 20:04:52,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:04:52,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:04:52,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:04:52,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:04:52,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:52" (1/1) ... [2020-11-29 20:04:52,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:52" (1/1) ... [2020-11-29 20:04:52,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:52" (1/1) ... [2020-11-29 20:04:52,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:52" (1/1) ... [2020-11-29 20:04:52,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:52" (1/1) ... [2020-11-29 20:04:52,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:52" (1/1) ... [2020-11-29 20:04:52,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:52" (1/1) ... [2020-11-29 20:04:52,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:04:52,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:04:52,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:04:52,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:04:52,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:04:52,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:04:52,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:04:52,341 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-11-29 20:04:52,342 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-11-29 20:04:52,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 20:04:52,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:04:52,695 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:04:52,695 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 20:04:52,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:04:52 BoogieIcfgContainer [2020-11-29 20:04:52,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:04:52,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:04:52,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:04:52,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:04:52,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:04:51" (1/3) ... [2020-11-29 20:04:52,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361c7ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:04:52, skipping insertion in model container [2020-11-29 20:04:52,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:04:52" (2/3) ... [2020-11-29 20:04:52,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361c7ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:04:52, skipping insertion in model container [2020-11-29 20:04:52,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:04:52" (3/3) ... [2020-11-29 20:04:52,711 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_25x0-2.c [2020-11-29 20:04:52,724 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:04:52,729 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 20:04:52,744 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 20:04:52,773 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:04:52,773 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 20:04:52,773 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:04:52,774 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:04:52,774 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:04:52,774 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:04:52,774 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:04:52,775 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:04:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-29 20:04:52,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 20:04:52,799 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:04:52,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:52,801 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:04:52,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:52,809 INFO L82 PathProgramCache]: Analyzing trace with hash 666808458, now seen corresponding path program 1 times [2020-11-29 20:04:52,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:52,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579147857] [2020-11-29 20:04:52,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:53,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:04:53,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579147857] [2020-11-29 20:04:53,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:04:53,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 20:04:53,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819532823] [2020-11-29 20:04:53,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:04:53,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:04:53,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:04:53,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:04:53,162 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-11-29 20:04:53,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:04:53,264 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-29 20:04:53,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:04:53,266 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-29 20:04:53,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:04:53,275 INFO L225 Difference]: With dead ends: 26 [2020-11-29 20:04:53,275 INFO L226 Difference]: Without dead ends: 15 [2020-11-29 20:04:53,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:04:53,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-29 20:04:53,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-29 20:04:53,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-29 20:04:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-29 20:04:53,315 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-11-29 20:04:53,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:04:53,316 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-29 20:04:53,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:04:53,316 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-29 20:04:53,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 20:04:53,317 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:04:53,318 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:53,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 20:04:53,318 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:04:53,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:53,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1352629460, now seen corresponding path program 1 times [2020-11-29 20:04:53,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:53,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612847658] [2020-11-29 20:04:53,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:53,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:53,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 20:04:53,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612847658] [2020-11-29 20:04:53,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235648030] [2020-11-29 20:04:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:04:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:53,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 20:04:53,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 20:04:53,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:04:53,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 20:04:53,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793755649] [2020-11-29 20:04:53,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:04:53,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:04:53,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:04:53,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:04:53,705 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-11-29 20:04:53,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:04:53,998 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-11-29 20:04:54,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:04:54,001 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-11-29 20:04:54,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:04:54,002 INFO L225 Difference]: With dead ends: 22 [2020-11-29 20:04:54,002 INFO L226 Difference]: Without dead ends: 18 [2020-11-29 20:04:54,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:04:54,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-29 20:04:54,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-29 20:04:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-29 20:04:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-29 20:04:54,018 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-11-29 20:04:54,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:04:54,019 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-29 20:04:54,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:04:54,020 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-29 20:04:54,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 20:04:54,022 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:04:54,023 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:54,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 20:04:54,238 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:04:54,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:54,239 INFO L82 PathProgramCache]: Analyzing trace with hash 832070858, now seen corresponding path program 2 times [2020-11-29 20:04:54,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:54,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712257765] [2020-11-29 20:04:54,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:54,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:54,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:54,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-29 20:04:54,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712257765] [2020-11-29 20:04:54,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034637044] [2020-11-29 20:04:54,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:04:54,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:04:54,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:04:54,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:04:54,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-29 20:04:54,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:04:54,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 20:04:54,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743364032] [2020-11-29 20:04:54,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 20:04:54,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:04:54,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:04:54,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:04:54,624 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-11-29 20:04:54,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:04:54,784 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-11-29 20:04:54,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:04:54,785 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-11-29 20:04:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:04:54,787 INFO L225 Difference]: With dead ends: 25 [2020-11-29 20:04:54,787 INFO L226 Difference]: Without dead ends: 21 [2020-11-29 20:04:54,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:04:54,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-29 20:04:54,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-29 20:04:54,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-29 20:04:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-29 20:04:54,797 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-11-29 20:04:54,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:04:54,798 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-29 20:04:54,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 20:04:54,798 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-29 20:04:54,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 20:04:54,801 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:04:54,801 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:55,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:04:55,002 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:04:55,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:55,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1547641236, now seen corresponding path program 3 times [2020-11-29 20:04:55,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:55,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474040429] [2020-11-29 20:04:55,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:55,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:55,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:55,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:55,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 20:04:55,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474040429] [2020-11-29 20:04:55,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123054875] [2020-11-29 20:04:55,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:04:55,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 20:04:55,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:04:55,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 20:04:55,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 20:04:55,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:04:55,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 20:04:55,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720352278] [2020-11-29 20:04:55,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:04:55,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:04:55,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:04:55,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:04:55,459 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-11-29 20:04:55,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:04:55,567 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-29 20:04:55,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 20:04:55,567 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-11-29 20:04:55,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:04:55,569 INFO L225 Difference]: With dead ends: 28 [2020-11-29 20:04:55,569 INFO L226 Difference]: Without dead ends: 24 [2020-11-29 20:04:55,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:04:55,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-29 20:04:55,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-29 20:04:55,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 20:04:55,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-29 20:04:55,577 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-11-29 20:04:55,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:04:55,578 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-29 20:04:55,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:04:55,578 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-29 20:04:55,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-29 20:04:55,579 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:04:55,580 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:55,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:04:55,806 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:04:55,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:55,806 INFO L82 PathProgramCache]: Analyzing trace with hash -346978038, now seen corresponding path program 4 times [2020-11-29 20:04:55,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:55,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585230449] [2020-11-29 20:04:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:55,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:55,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:55,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:56,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:56,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-29 20:04:56,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585230449] [2020-11-29 20:04:56,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159404802] [2020-11-29 20:04:56,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:04:56,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:04:56,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:04:56,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 20:04:56,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-29 20:04:56,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:04:56,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 20:04:56,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035507408] [2020-11-29 20:04:56,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 20:04:56,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:04:56,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 20:04:56,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:04:56,242 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-11-29 20:04:56,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:04:56,369 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-11-29 20:04:56,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 20:04:56,370 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-11-29 20:04:56,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:04:56,372 INFO L225 Difference]: With dead ends: 31 [2020-11-29 20:04:56,372 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 20:04:56,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-29 20:04:56,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 20:04:56,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-29 20:04:56,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 20:04:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-29 20:04:56,381 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-11-29 20:04:56,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:04:56,381 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-29 20:04:56,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 20:04:56,381 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-29 20:04:56,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 20:04:56,383 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:04:56,383 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:56,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:04:56,584 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:04:56,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:56,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1234184620, now seen corresponding path program 5 times [2020-11-29 20:04:56,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:56,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506318354] [2020-11-29 20:04:56,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:56,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:56,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:56,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:56,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:56,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:56,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-29 20:04:56,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506318354] [2020-11-29 20:04:56,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637349624] [2020-11-29 20:04:56,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:04:56,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-29 20:04:56,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:04:56,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 20:04:56,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-29 20:04:57,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:04:57,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-29 20:04:57,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996239438] [2020-11-29 20:04:57,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 20:04:57,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:04:57,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 20:04:57,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:04:57,098 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-11-29 20:04:57,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:04:57,252 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-11-29 20:04:57,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 20:04:57,252 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-11-29 20:04:57,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:04:57,254 INFO L225 Difference]: With dead ends: 34 [2020-11-29 20:04:57,254 INFO L226 Difference]: Without dead ends: 30 [2020-11-29 20:04:57,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-11-29 20:04:57,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-29 20:04:57,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-29 20:04:57,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 20:04:57,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-29 20:04:57,263 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-11-29 20:04:57,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:04:57,263 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-29 20:04:57,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 20:04:57,263 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-29 20:04:57,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-29 20:04:57,265 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:04:57,266 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:57,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 20:04:57,479 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:04:57,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:57,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1831214410, now seen corresponding path program 6 times [2020-11-29 20:04:57,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:57,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469247540] [2020-11-29 20:04:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:57,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:57,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:57,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:57,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:57,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:57,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:57,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-29 20:04:57,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469247540] [2020-11-29 20:04:57,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25078932] [2020-11-29 20:04:57,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:04:57,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-29 20:04:57,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:04:57,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 20:04:57,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-29 20:04:57,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:04:57,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-29 20:04:57,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645287057] [2020-11-29 20:04:57,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 20:04:57,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:04:57,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 20:04:57,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:04:57,983 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-11-29 20:04:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:04:58,159 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-11-29 20:04:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:04:58,159 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-11-29 20:04:58,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:04:58,161 INFO L225 Difference]: With dead ends: 37 [2020-11-29 20:04:58,161 INFO L226 Difference]: Without dead ends: 33 [2020-11-29 20:04:58,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-11-29 20:04:58,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-29 20:04:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-29 20:04:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-29 20:04:58,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-11-29 20:04:58,169 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-11-29 20:04:58,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:04:58,170 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-11-29 20:04:58,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 20:04:58,170 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-11-29 20:04:58,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-29 20:04:58,171 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:04:58,172 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:58,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:04:58,398 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:04:58,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:58,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1739954964, now seen corresponding path program 7 times [2020-11-29 20:04:58,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:58,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339777298] [2020-11-29 20:04:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:58,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:58,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:58,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:58,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:58,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:58,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:58,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:58,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-29 20:04:58,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339777298] [2020-11-29 20:04:58,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083028379] [2020-11-29 20:04:58,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:04:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:58,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 20:04:58,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:04:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-29 20:04:59,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:04:59,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-29 20:04:59,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964744470] [2020-11-29 20:04:59,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 20:04:59,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:04:59,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 20:04:59,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:04:59,074 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-11-29 20:04:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:04:59,286 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-11-29 20:04:59,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 20:04:59,287 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-11-29 20:04:59,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:04:59,288 INFO L225 Difference]: With dead ends: 40 [2020-11-29 20:04:59,288 INFO L226 Difference]: Without dead ends: 36 [2020-11-29 20:04:59,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-11-29 20:04:59,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-29 20:04:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-29 20:04:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 20:04:59,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-11-29 20:04:59,303 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-11-29 20:04:59,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:04:59,304 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-11-29 20:04:59,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 20:04:59,304 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-11-29 20:04:59,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-29 20:04:59,309 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:04:59,310 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:04:59,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:04:59,530 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:04:59,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:04:59,530 INFO L82 PathProgramCache]: Analyzing trace with hash -632151670, now seen corresponding path program 8 times [2020-11-29 20:04:59,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:04:59,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550871102] [2020-11-29 20:04:59,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:04:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:59,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:59,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:59,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:59,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:59,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:59,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:59,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:59,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:59,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:04:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:04:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-29 20:04:59,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550871102] [2020-11-29 20:04:59,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372696429] [2020-11-29 20:04:59,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:00,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:05:00,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:05:00,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 20:05:00,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-29 20:05:00,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:05:00,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-29 20:05:00,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303980796] [2020-11-29 20:05:00,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 20:05:00,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:00,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 20:05:00,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:05:00,127 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-11-29 20:05:00,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:00,369 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-11-29 20:05:00,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 20:05:00,370 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-11-29 20:05:00,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:05:00,372 INFO L225 Difference]: With dead ends: 43 [2020-11-29 20:05:00,372 INFO L226 Difference]: Without dead ends: 39 [2020-11-29 20:05:00,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-11-29 20:05:00,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-29 20:05:00,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-29 20:05:00,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-29 20:05:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-11-29 20:05:00,384 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-11-29 20:05:00,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:05:00,385 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-11-29 20:05:00,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 20:05:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-11-29 20:05:00,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-29 20:05:00,392 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:05:00,393 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:05:00,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-29 20:05:00,618 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:05:00,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:00,618 INFO L82 PathProgramCache]: Analyzing trace with hash 764702676, now seen corresponding path program 9 times [2020-11-29 20:05:00,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:00,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145757244] [2020-11-29 20:05:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:00,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:00,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:00,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:00,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:00,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:00,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:00,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:00,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:01,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:01,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-29 20:05:01,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145757244] [2020-11-29 20:05:01,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745313086] [2020-11-29 20:05:01,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:01,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-29 20:05:01,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:05:01,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 20:05:01,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-29 20:05:01,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:05:01,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-29 20:05:01,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096140680] [2020-11-29 20:05:01,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 20:05:01,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:01,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 20:05:01,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-29 20:05:01,305 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-11-29 20:05:01,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:01,532 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-11-29 20:05:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 20:05:01,533 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-11-29 20:05:01,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:05:01,534 INFO L225 Difference]: With dead ends: 46 [2020-11-29 20:05:01,534 INFO L226 Difference]: Without dead ends: 42 [2020-11-29 20:05:01,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-11-29 20:05:01,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-29 20:05:01,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-29 20:05:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 20:05:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-11-29 20:05:01,556 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-11-29 20:05:01,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:05:01,556 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-11-29 20:05:01,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 20:05:01,556 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-11-29 20:05:01,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-29 20:05:01,560 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:05:01,560 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:05:01,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:01,786 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:05:01,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:01,786 INFO L82 PathProgramCache]: Analyzing trace with hash 554800586, now seen corresponding path program 10 times [2020-11-29 20:05:01,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:01,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725862782] [2020-11-29 20:05:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:01,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:01,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:01,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:01,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:02,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:02,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:02,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:02,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:02,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:02,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:02,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:02,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-11-29 20:05:02,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725862782] [2020-11-29 20:05:02,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614534583] [2020-11-29 20:05:02,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/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 [2020-11-29 20:05:02,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:05:02,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:05:02,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 20:05:02,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-11-29 20:05:02,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:05:02,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-29 20:05:02,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047485935] [2020-11-29 20:05:02,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 20:05:02,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:02,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 20:05:02,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-11-29 20:05:02,504 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-11-29 20:05:02,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:02,763 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-11-29 20:05:02,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 20:05:02,764 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-11-29 20:05:02,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:05:02,765 INFO L225 Difference]: With dead ends: 49 [2020-11-29 20:05:02,765 INFO L226 Difference]: Without dead ends: 45 [2020-11-29 20:05:02,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-11-29 20:05:02,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-29 20:05:02,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-11-29 20:05:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 20:05:02,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-11-29 20:05:02,780 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-11-29 20:05:02,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:05:02,782 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-11-29 20:05:02,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 20:05:02,782 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-11-29 20:05:02,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-29 20:05:02,784 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:05:02,784 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:05:03,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:03,010 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:05:03,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:03,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1164946284, now seen corresponding path program 11 times [2020-11-29 20:05:03,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:03,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058042522] [2020-11-29 20:05:03,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:03,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:03,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:03,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:03,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:03,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:03,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:03,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:03,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:03,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:03,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:03,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:03,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-11-29 20:05:03,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058042522] [2020-11-29 20:05:03,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652609785] [2020-11-29 20:05:03,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/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 [2020-11-29 20:05:03,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-29 20:05:03,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:05:03,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-29 20:05:03,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-11-29 20:05:03,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:05:03,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-29 20:05:03,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411957206] [2020-11-29 20:05:03,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 20:05:03,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:03,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 20:05:03,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-11-29 20:05:03,702 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-11-29 20:05:03,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:03,971 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-11-29 20:05:03,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 20:05:03,972 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-11-29 20:05:03,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:05:03,973 INFO L225 Difference]: With dead ends: 52 [2020-11-29 20:05:03,973 INFO L226 Difference]: Without dead ends: 48 [2020-11-29 20:05:03,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-11-29 20:05:03,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-29 20:05:03,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-11-29 20:05:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 20:05:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-11-29 20:05:03,987 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2020-11-29 20:05:03,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:05:03,988 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-11-29 20:05:03,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 20:05:03,988 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-11-29 20:05:03,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-11-29 20:05:03,990 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:05:03,990 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:05:04,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-29 20:05:04,191 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:05:04,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:04,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1163888118, now seen corresponding path program 12 times [2020-11-29 20:05:04,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:04,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525954636] [2020-11-29 20:05:04,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:04,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:04,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:04,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:04,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:04,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:04,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:04,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:04,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:04,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:04,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:04,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:04,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:04,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:04,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-11-29 20:05:04,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525954636] [2020-11-29 20:05:04,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571312945] [2020-11-29 20:05:04,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/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 [2020-11-29 20:05:04,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-29 20:05:04,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:05:04,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 20:05:04,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-11-29 20:05:04,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:05:04,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-29 20:05:04,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89978286] [2020-11-29 20:05:04,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 20:05:04,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:04,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 20:05:05,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-11-29 20:05:05,000 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-11-29 20:05:05,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:05,350 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-11-29 20:05:05,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 20:05:05,351 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-11-29 20:05:05,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:05:05,352 INFO L225 Difference]: With dead ends: 55 [2020-11-29 20:05:05,352 INFO L226 Difference]: Without dead ends: 51 [2020-11-29 20:05:05,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-11-29 20:05:05,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-29 20:05:05,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-11-29 20:05:05,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-29 20:05:05,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-11-29 20:05:05,368 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2020-11-29 20:05:05,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:05:05,369 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-11-29 20:05:05,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 20:05:05,369 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-11-29 20:05:05,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-29 20:05:05,370 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:05:05,370 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:05:05,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 20:05:05,571 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:05:05,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:05,572 INFO L82 PathProgramCache]: Analyzing trace with hash -164804268, now seen corresponding path program 13 times [2020-11-29 20:05:05,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:05,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255813933] [2020-11-29 20:05:05,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:05,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:05,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:05,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:05,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:05,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:05,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:05,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:05,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:05,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:06,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:06,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:06,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:06,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:06,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-11-29 20:05:06,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255813933] [2020-11-29 20:05:06,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858377447] [2020-11-29 20:05:06,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/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 [2020-11-29 20:05:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:06,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 20:05:06,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-11-29 20:05:06,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:05:06,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-29 20:05:06,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281046837] [2020-11-29 20:05:06,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-29 20:05:06,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:06,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-29 20:05:06,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-11-29 20:05:06,513 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-11-29 20:05:06,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:06,826 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-11-29 20:05:06,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 20:05:06,827 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 88 [2020-11-29 20:05:06,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:05:06,828 INFO L225 Difference]: With dead ends: 58 [2020-11-29 20:05:06,828 INFO L226 Difference]: Without dead ends: 54 [2020-11-29 20:05:06,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 20:05:06,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-29 20:05:06,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-11-29 20:05:06,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-29 20:05:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-11-29 20:05:06,840 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2020-11-29 20:05:06,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:05:06,840 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-11-29 20:05:06,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-29 20:05:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-11-29 20:05:06,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-11-29 20:05:06,845 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:05:06,845 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:05:07,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 20:05:07,058 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:05:07,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:07,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1799016010, now seen corresponding path program 14 times [2020-11-29 20:05:07,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:07,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924170707] [2020-11-29 20:05:07,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:07,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:07,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:07,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:07,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:07,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:07,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:07,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:07,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:07,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:07,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:07,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:07,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:07,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:07,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:07,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:07,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-11-29 20:05:07,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924170707] [2020-11-29 20:05:07,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313932017] [2020-11-29 20:05:07,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/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 [2020-11-29 20:05:07,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:05:07,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:05:07,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 20:05:07,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-11-29 20:05:07,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:05:07,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-29 20:05:08,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578563837] [2020-11-29 20:05:08,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 20:05:08,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:08,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 20:05:08,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-11-29 20:05:08,002 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-11-29 20:05:08,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:08,360 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-11-29 20:05:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 20:05:08,361 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-11-29 20:05:08,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:05:08,362 INFO L225 Difference]: With dead ends: 61 [2020-11-29 20:05:08,362 INFO L226 Difference]: Without dead ends: 57 [2020-11-29 20:05:08,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-11-29 20:05:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-29 20:05:08,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-11-29 20:05:08,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-29 20:05:08,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-11-29 20:05:08,370 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2020-11-29 20:05:08,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:05:08,371 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-11-29 20:05:08,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 20:05:08,371 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-11-29 20:05:08,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-11-29 20:05:08,373 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:05:08,373 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:05:08,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:08,598 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:05:08,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:08,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1022316052, now seen corresponding path program 15 times [2020-11-29 20:05:08,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:08,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299450555] [2020-11-29 20:05:08,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:08,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:08,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:08,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:08,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:08,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:08,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:08,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:08,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:09,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:09,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:09,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:09,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:09,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:09,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:09,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:09,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:09,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-11-29 20:05:09,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299450555] [2020-11-29 20:05:09,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656768754] [2020-11-29 20:05:09,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/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 [2020-11-29 20:05:09,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-29 20:05:09,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:05:09,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-29 20:05:09,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-11-29 20:05:09,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:05:09,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-29 20:05:09,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697709226] [2020-11-29 20:05:09,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-29 20:05:09,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:09,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-29 20:05:09,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-11-29 20:05:09,677 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-11-29 20:05:10,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:10,080 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-11-29 20:05:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 20:05:10,080 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2020-11-29 20:05:10,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:05:10,082 INFO L225 Difference]: With dead ends: 64 [2020-11-29 20:05:10,082 INFO L226 Difference]: Without dead ends: 60 [2020-11-29 20:05:10,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 20:05:10,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-29 20:05:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-11-29 20:05:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 20:05:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-11-29 20:05:10,094 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2020-11-29 20:05:10,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:05:10,094 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-11-29 20:05:10,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-29 20:05:10,094 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-11-29 20:05:10,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-29 20:05:10,097 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:05:10,097 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:05:10,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 20:05:10,297 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:05:10,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:10,298 INFO L82 PathProgramCache]: Analyzing trace with hash 35426954, now seen corresponding path program 16 times [2020-11-29 20:05:10,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:10,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082962896] [2020-11-29 20:05:10,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:10,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:10,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:10,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:10,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:10,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:10,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:10,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:10,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:10,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:10,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:10,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:10,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:10,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:10,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:10,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:10,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:11,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-11-29 20:05:11,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082962896] [2020-11-29 20:05:11,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769637384] [2020-11-29 20:05:11,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:11,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:05:11,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:05:11,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-29 20:05:11,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-11-29 20:05:11,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:05:11,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-29 20:05:11,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531615271] [2020-11-29 20:05:11,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 20:05:11,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:11,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 20:05:11,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-11-29 20:05:11,365 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 22 states. [2020-11-29 20:05:11,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:11,727 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-11-29 20:05:11,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-29 20:05:11,728 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-11-29 20:05:11,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:05:11,729 INFO L225 Difference]: With dead ends: 67 [2020-11-29 20:05:11,729 INFO L226 Difference]: Without dead ends: 63 [2020-11-29 20:05:11,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2020-11-29 20:05:11,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-29 20:05:11,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-29 20:05:11,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-29 20:05:11,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-11-29 20:05:11,737 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2020-11-29 20:05:11,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:05:11,737 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-11-29 20:05:11,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 20:05:11,738 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-11-29 20:05:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-11-29 20:05:11,739 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:05:11,739 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:05:11,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 20:05:11,940 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:05:11,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:11,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1604689196, now seen corresponding path program 17 times [2020-11-29 20:05:11,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:11,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490745592] [2020-11-29 20:05:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:11,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:12,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:12,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:12,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:12,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:12,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:12,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:12,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:12,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:12,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:12,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:12,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:12,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:12,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:12,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:12,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:12,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:12,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-11-29 20:05:12,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490745592] [2020-11-29 20:05:12,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011358166] [2020-11-29 20:05:12,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:13,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-11-29 20:05:13,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:05:13,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-29 20:05:13,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-11-29 20:05:13,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:05:13,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-29 20:05:13,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396712577] [2020-11-29 20:05:13,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 20:05:13,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:13,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 20:05:13,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-11-29 20:05:13,111 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 23 states. [2020-11-29 20:05:13,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:13,513 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-11-29 20:05:13,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 20:05:13,514 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2020-11-29 20:05:13,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:05:13,516 INFO L225 Difference]: With dead ends: 70 [2020-11-29 20:05:13,516 INFO L226 Difference]: Without dead ends: 66 [2020-11-29 20:05:13,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2020-11-29 20:05:13,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-29 20:05:13,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-11-29 20:05:13,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-29 20:05:13,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-11-29 20:05:13,524 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2020-11-29 20:05:13,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:05:13,524 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-11-29 20:05:13,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 20:05:13,525 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-11-29 20:05:13,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-11-29 20:05:13,526 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:05:13,527 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:05:13,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 20:05:13,754 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:05:13,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:13,754 INFO L82 PathProgramCache]: Analyzing trace with hash 427935434, now seen corresponding path program 18 times [2020-11-29 20:05:13,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:13,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024551281] [2020-11-29 20:05:13,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:13,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:13,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:13,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:13,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:14,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:14,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:14,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:14,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:14,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:14,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:14,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:14,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:14,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:14,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:14,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:14,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:14,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:14,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:14,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-11-29 20:05:14,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024551281] [2020-11-29 20:05:14,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560251678] [2020-11-29 20:05:14,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:14,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-29 20:05:14,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:05:14,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 80 conjunts are in the unsatisfiable core [2020-11-29 20:05:14,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-11-29 20:05:17,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:05:17,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 43] total 63 [2020-11-29 20:05:17,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690823377] [2020-11-29 20:05:17,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-29 20:05:17,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:17,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-29 20:05:17,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=620, Invalid=3286, Unknown=0, NotChecked=0, Total=3906 [2020-11-29 20:05:17,117 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 63 states. [2020-11-29 20:05:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:19,448 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-11-29 20:05:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-29 20:05:19,460 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 118 [2020-11-29 20:05:19,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:05:19,461 INFO L225 Difference]: With dead ends: 73 [2020-11-29 20:05:19,461 INFO L226 Difference]: Without dead ends: 69 [2020-11-29 20:05:19,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1855, Invalid=8245, Unknown=0, NotChecked=0, Total=10100 [2020-11-29 20:05:19,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-29 20:05:19,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-11-29 20:05:19,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-29 20:05:19,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-11-29 20:05:19,487 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2020-11-29 20:05:19,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:05:19,487 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-11-29 20:05:19,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-11-29 20:05:19,488 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-11-29 20:05:19,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-11-29 20:05:19,489 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:05:19,490 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:05:19,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:19,716 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:05:19,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:19,717 INFO L82 PathProgramCache]: Analyzing trace with hash 653428628, now seen corresponding path program 19 times [2020-11-29 20:05:19,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:19,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539957796] [2020-11-29 20:05:19,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:19,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:19,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:19,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:19,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:20,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:20,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:20,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:20,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:20,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:20,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:20,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:20,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:20,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:20,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:20,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:20,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:20,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:20,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:20,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:20,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:20,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-11-29 20:05:20,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539957796] [2020-11-29 20:05:20,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088751245] [2020-11-29 20:05:20,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:21,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-29 20:05:21,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-11-29 20:05:21,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:05:21,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-29 20:05:21,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552033770] [2020-11-29 20:05:21,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-29 20:05:21,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:21,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-29 20:05:21,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-11-29 20:05:21,125 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 25 states. [2020-11-29 20:05:21,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:21,595 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-11-29 20:05:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 20:05:21,596 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 124 [2020-11-29 20:05:21,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:05:21,597 INFO L225 Difference]: With dead ends: 76 [2020-11-29 20:05:21,597 INFO L226 Difference]: Without dead ends: 72 [2020-11-29 20:05:21,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2020-11-29 20:05:21,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-29 20:05:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-11-29 20:05:21,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 20:05:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-11-29 20:05:21,609 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2020-11-29 20:05:21,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:05:21,609 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-11-29 20:05:21,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-29 20:05:21,609 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-11-29 20:05:21,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-29 20:05:21,611 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:05:21,611 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:05:21,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:21,811 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:05:21,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:21,812 INFO L82 PathProgramCache]: Analyzing trace with hash -693736694, now seen corresponding path program 20 times [2020-11-29 20:05:21,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:21,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656056192] [2020-11-29 20:05:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:21,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:21,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:22,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:23,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-11-29 20:05:23,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656056192] [2020-11-29 20:05:23,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705836011] [2020-11-29 20:05:23,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:23,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:05:23,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:05:23,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-29 20:05:23,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-11-29 20:05:23,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:05:23,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-29 20:05:23,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407087983] [2020-11-29 20:05:23,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-29 20:05:23,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:23,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-29 20:05:23,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-11-29 20:05:23,399 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 26 states. [2020-11-29 20:05:23,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:23,840 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-11-29 20:05:23,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-29 20:05:23,841 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 130 [2020-11-29 20:05:23,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:05:23,842 INFO L225 Difference]: With dead ends: 79 [2020-11-29 20:05:23,842 INFO L226 Difference]: Without dead ends: 75 [2020-11-29 20:05:23,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=785, Invalid=1377, Unknown=0, NotChecked=0, Total=2162 [2020-11-29 20:05:23,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-29 20:05:23,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-11-29 20:05:23,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-29 20:05:23,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-11-29 20:05:23,849 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2020-11-29 20:05:23,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:05:23,854 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-11-29 20:05:23,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-29 20:05:23,854 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-11-29 20:05:23,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-29 20:05:23,856 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:05:23,857 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:05:24,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-29 20:05:24,074 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:05:24,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:24,074 INFO L82 PathProgramCache]: Analyzing trace with hash 205241428, now seen corresponding path program 21 times [2020-11-29 20:05:24,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:24,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887258006] [2020-11-29 20:05:24,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:24,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:24,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:24,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:24,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:24,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:24,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:24,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:24,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:24,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:24,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:24,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:24,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:24,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:24,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:24,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:24,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:24,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:25,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:25,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:25,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:25,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:25,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-11-29 20:05:25,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887258006] [2020-11-29 20:05:25,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965395719] [2020-11-29 20:05:25,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:25,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-11-29 20:05:25,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:05:25,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 46 conjunts are in the unsatisfiable core [2020-11-29 20:05:25,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-11-29 20:05:25,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:05:25,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-29 20:05:25,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824862408] [2020-11-29 20:05:25,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-29 20:05:25,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:25,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-29 20:05:25,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2020-11-29 20:05:25,782 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 27 states. [2020-11-29 20:05:26,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:26,287 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-11-29 20:05:26,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-29 20:05:26,291 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 136 [2020-11-29 20:05:26,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:05:26,292 INFO L225 Difference]: With dead ends: 82 [2020-11-29 20:05:26,292 INFO L226 Difference]: Without dead ends: 78 [2020-11-29 20:05:26,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=855, Invalid=1497, Unknown=0, NotChecked=0, Total=2352 [2020-11-29 20:05:26,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-29 20:05:26,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-11-29 20:05:26,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-29 20:05:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-11-29 20:05:26,308 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 136 [2020-11-29 20:05:26,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:05:26,308 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-11-29 20:05:26,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-29 20:05:26,309 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-11-29 20:05:26,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-11-29 20:05:26,312 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:05:26,313 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:05:26,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-29 20:05:26,513 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:05:26,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:26,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1446609078, now seen corresponding path program 22 times [2020-11-29 20:05:26,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:26,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678581831] [2020-11-29 20:05:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:26,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:26,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:26,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:26,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:26,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:27,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:27,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:27,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:27,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:27,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:27,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:27,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:27,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:27,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:27,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:27,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:27,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:27,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:27,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:27,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:27,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:28,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:28,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-11-29 20:05:28,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678581831] [2020-11-29 20:05:28,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339197135] [2020-11-29 20:05:28,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:28,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:05:28,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:05:28,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 48 conjunts are in the unsatisfiable core [2020-11-29 20:05:28,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-11-29 20:05:28,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:05:28,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-29 20:05:28,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974022249] [2020-11-29 20:05:28,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-29 20:05:28,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:28,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-29 20:05:28,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2020-11-29 20:05:28,582 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 28 states. [2020-11-29 20:05:29,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:29,037 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-11-29 20:05:29,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-29 20:05:29,038 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 142 [2020-11-29 20:05:29,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:05:29,039 INFO L225 Difference]: With dead ends: 85 [2020-11-29 20:05:29,039 INFO L226 Difference]: Without dead ends: 81 [2020-11-29 20:05:29,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=928, Invalid=1622, Unknown=0, NotChecked=0, Total=2550 [2020-11-29 20:05:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-29 20:05:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-11-29 20:05:29,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-29 20:05:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-11-29 20:05:29,046 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 142 [2020-11-29 20:05:29,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:05:29,046 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-11-29 20:05:29,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-29 20:05:29,047 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-11-29 20:05:29,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-11-29 20:05:29,048 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:05:29,048 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:05:29,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:29,249 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:05:29,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:29,249 INFO L82 PathProgramCache]: Analyzing trace with hash 12189972, now seen corresponding path program 23 times [2020-11-29 20:05:29,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:29,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950369594] [2020-11-29 20:05:29,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:29,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:29,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:29,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:29,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:29,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:29,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:29,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:29,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:29,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:30,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:30,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:30,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:30,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:30,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:30,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:30,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:30,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:30,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:30,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:30,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:30,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:30,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:30,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:30,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-11-29 20:05:31,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950369594] [2020-11-29 20:05:31,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977517062] [2020-11-29 20:05:31,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:31,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-11-29 20:05:31,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:05:31,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 50 conjunts are in the unsatisfiable core [2020-11-29 20:05:31,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-11-29 20:05:31,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:05:31,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-29 20:05:31,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788797873] [2020-11-29 20:05:31,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-29 20:05:31,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:31,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-29 20:05:31,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2020-11-29 20:05:31,347 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 29 states. [2020-11-29 20:05:31,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:31,914 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-11-29 20:05:31,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-29 20:05:31,915 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 148 [2020-11-29 20:05:31,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:05:31,916 INFO L225 Difference]: With dead ends: 88 [2020-11-29 20:05:31,916 INFO L226 Difference]: Without dead ends: 84 [2020-11-29 20:05:31,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1004, Invalid=1752, Unknown=0, NotChecked=0, Total=2756 [2020-11-29 20:05:31,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-29 20:05:31,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-11-29 20:05:31,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-29 20:05:31,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-11-29 20:05:31,923 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 148 [2020-11-29 20:05:31,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:05:31,924 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-11-29 20:05:31,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-29 20:05:31,924 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-11-29 20:05:31,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-11-29 20:05:31,926 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:05:31,926 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:05:32,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-29 20:05:32,146 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:05:32,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:32,146 INFO L82 PathProgramCache]: Analyzing trace with hash 236848010, now seen corresponding path program 24 times [2020-11-29 20:05:32,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:32,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808125878] [2020-11-29 20:05:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:32,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:32,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:32,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:32,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:32,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:32,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:32,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:32,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:32,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:32,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:32,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:33,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:33,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:33,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:33,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:33,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:33,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:33,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:33,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:33,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:33,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:33,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:33,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:33,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:33,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:05:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:05:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-11-29 20:05:33,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808125878] [2020-11-29 20:05:33,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372037970] [2020-11-29 20:05:33,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:34,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-11-29 20:05:34,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:05:34,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 52 conjunts are in the unsatisfiable core [2020-11-29 20:05:34,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:05:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-11-29 20:05:34,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:05:34,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-29 20:05:34,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111192545] [2020-11-29 20:05:34,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-29 20:05:34,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:05:34,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-29 20:05:34,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2020-11-29 20:05:34,237 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 30 states. [2020-11-29 20:05:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:05:34,911 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-11-29 20:05:34,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-29 20:05:34,912 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 154 [2020-11-29 20:05:34,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:05:34,913 INFO L225 Difference]: With dead ends: 91 [2020-11-29 20:05:34,913 INFO L226 Difference]: Without dead ends: 87 [2020-11-29 20:05:34,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1083, Invalid=1887, Unknown=0, NotChecked=0, Total=2970 [2020-11-29 20:05:34,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-29 20:05:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-11-29 20:05:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-29 20:05:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-11-29 20:05:34,923 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 154 [2020-11-29 20:05:34,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:05:34,923 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-11-29 20:05:34,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-29 20:05:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-11-29 20:05:34,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-11-29 20:05:34,925 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:05:34,925 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:05:35,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:05:35,126 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 20:05:35,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:05:35,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1777423828, now seen corresponding path program 25 times [2020-11-29 20:05:35,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:05:35,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821851543] [2020-11-29 20:05:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:05:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:05:35,206 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:05:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:05:35,299 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:05:35,354 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:05:35,354 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 20:05:35,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-29 20:05:35,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:05:35 BoogieIcfgContainer [2020-11-29 20:05:35,511 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:05:35,511 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:05:35,511 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:05:35,512 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:05:35,512 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:04:52" (3/4) ... [2020-11-29 20:05:35,515 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 20:05:35,620 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_740a1e0d-cdae-4e9e-ba43-468f73d9c41f/bin/uautomizer/witness.graphml [2020-11-29 20:05:35,620 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:05:35,622 INFO L168 Benchmark]: Toolchain (without parser) took 43790.26 ms. Allocated memory was 92.3 MB in the beginning and 597.7 MB in the end (delta: 505.4 MB). Free memory was 62.7 MB in the beginning and 507.3 MB in the end (delta: -444.6 MB). Peak memory consumption was 60.2 MB. Max. memory is 16.1 GB. [2020-11-29 20:05:35,623 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 92.3 MB. Free memory was 50.0 MB in the beginning and 49.9 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:05:35,623 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.07 ms. Allocated memory is still 92.3 MB. Free memory was 62.5 MB in the beginning and 69.9 MB in the end (delta: -7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 20:05:35,624 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.33 ms. Allocated memory is still 92.3 MB. Free memory was 69.9 MB in the beginning and 68.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:05:35,624 INFO L168 Benchmark]: Boogie Preprocessor took 31.63 ms. Allocated memory is still 92.3 MB. Free memory was 68.6 MB in the beginning and 67.7 MB in the end (delta: 925.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:05:35,625 INFO L168 Benchmark]: RCFGBuilder took 447.12 ms. Allocated memory is still 92.3 MB. Free memory was 67.4 MB in the beginning and 56.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 20:05:35,625 INFO L168 Benchmark]: TraceAbstraction took 42807.70 ms. Allocated memory was 92.3 MB in the beginning and 597.7 MB in the end (delta: 505.4 MB). Free memory was 56.4 MB in the beginning and 514.6 MB in the end (delta: -458.2 MB). Peak memory consumption was 48.6 MB. Max. memory is 16.1 GB. [2020-11-29 20:05:35,626 INFO L168 Benchmark]: Witness Printer took 109.05 ms. Allocated memory is still 597.7 MB. Free memory was 514.6 MB in the beginning and 507.3 MB in the end (delta: 7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 20:05:35,628 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 92.3 MB. Free memory was 50.0 MB in the beginning and 49.9 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 323.07 ms. Allocated memory is still 92.3 MB. Free memory was 62.5 MB in the beginning and 69.9 MB in the end (delta: -7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.33 ms. Allocated memory is still 92.3 MB. Free memory was 69.9 MB in the beginning and 68.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.63 ms. Allocated memory is still 92.3 MB. Free memory was 68.6 MB in the beginning and 67.7 MB in the end (delta: 925.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 447.12 ms. Allocated memory is still 92.3 MB. Free memory was 67.4 MB in the beginning and 56.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 42807.70 ms. Allocated memory was 92.3 MB in the beginning and 597.7 MB in the end (delta: 505.4 MB). Free memory was 56.4 MB in the beginning and 514.6 MB in the end (delta: -458.2 MB). Peak memory consumption was 48.6 MB. Max. memory is 16.1 GB. * Witness Printer took 109.05 ms. Allocated memory is still 597.7 MB. Free memory was 514.6 MB in the beginning and 507.3 MB in the end (delta: 7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int a = 25; [L15] int b = 0; [L16] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=25] [L6] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=25, m=0, n=25] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=24] [L6] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=24, m=1, n=24] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=23] [L6] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=23, m=2, n=23] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=22] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=22, m=3, n=22] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=21] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=21, m=4, n=21] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=20] [L6] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=20, m=5, n=20] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=19] [L6] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=19, m=6, n=19] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=18] [L6] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=18, m=7, n=18] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=17] [L6] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=17, m=8, n=17] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=16] [L6] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=16, m=9, n=16] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=15] [L6] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=15, m=10, n=15] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=14] [L6] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=14, m=11, n=14] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=13] [L6] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=13, m=12, n=13] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=12] [L6] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=12, m=13, n=12] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=11] [L6] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=11, m=14, n=11] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=10] [L6] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=10, m=15, n=10] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=9] [L6] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=9, m=16, n=9] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=8] [L6] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=8, m=17, n=8] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=7] [L6] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=7, m=18, n=7] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=6] [L6] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=6, m=19, n=6] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=5] [L6] COND FALSE !(n <= 0) VAL [\old(m)=20, \old(n)=5, m=20, n=5] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=21, \old(n)=4] [L6] COND FALSE !(n <= 0) VAL [\old(m)=21, \old(n)=4, m=21, n=4] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=22, \old(n)=3] [L6] COND FALSE !(n <= 0) VAL [\old(m)=22, \old(n)=3, m=22, n=3] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=23, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=23, \old(n)=2, m=23, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=24, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=24, \old(n)=1, m=24, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=25, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=25, \old(n)=0, \result=25, m=25, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=24, \old(n)=1, m=24, n=1, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=23, \old(n)=2, m=23, n=2, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=22, \old(n)=3, m=22, n=3, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=21, \old(n)=4, m=21, n=4, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=5, m=20, n=5, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=6, m=19, n=6, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=7, m=18, n=7, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=8, m=17, n=8, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=9, m=16, n=9, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=10, m=15, n=10, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=11, m=14, n=11, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=12, m=13, n=12, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=13, m=12, n=13, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=14, m=11, n=14, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=15, m=10, n=15, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=16, m=9, n=16, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=17, m=8, n=17, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=18, m=7, n=18, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=19, m=6, n=19, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=20, m=5, n=20, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=21, m=4, n=21, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=22, m=3, n=22, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=23, m=2, n=23, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=24, m=1, n=24, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=25, m=0, n=25, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L3] __assert_fail("0", "sum_25x0-2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 42.5s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 10.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 226 SDtfs, 1095 SDslu, 1289 SDs, 0 SdLazy, 1311 SolverSat, 309 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3410 GetRequests, 2628 SyntacticMatches, 0 SemanticMatches, 782 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 17.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 22.9s InterpolantComputationTime, 4250 NumberOfCodeBlocks, 4250 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 4041 ConstructedInterpolants, 0 QuantifiedInterpolants, 1110405 SizeOfPredicates, 351 NumberOfNonLiveVariables, 6792 ConjunctsInSsa, 736 ConjunctsInUnsatCore, 49 InterpolantComputations, 1 PerfectInterpolantSequences, 15000/30000 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...