./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ffdaeeffc8c5fdb555812137dbba1199bd1a626d ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 08:37:49,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 08:37:49,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 08:37:49,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 08:37:49,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 08:37:49,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 08:37:49,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 08:37:49,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 08:37:49,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 08:37:49,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 08:37:49,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 08:37:49,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 08:37:49,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 08:37:49,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 08:37:49,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 08:37:49,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 08:37:49,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 08:37:49,253 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 08:37:49,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 08:37:49,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 08:37:49,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 08:37:49,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 08:37:49,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 08:37:49,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 08:37:49,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 08:37:49,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 08:37:49,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 08:37:49,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 08:37:49,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 08:37:49,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 08:37:49,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 08:37:49,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 08:37:49,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 08:37:49,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 08:37:49,283 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 08:37:49,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 08:37:49,284 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 08:37:49,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 08:37:49,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 08:37:49,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 08:37:49,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 08:37:49,288 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 08:37:49,313 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 08:37:49,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 08:37:49,315 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 08:37:49,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 08:37:49,315 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 08:37:49,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 08:37:49,315 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 08:37:49,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 08:37:49,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 08:37:49,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 08:37:49,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 08:37:49,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 08:37:49,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 08:37:49,317 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 08:37:49,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 08:37:49,317 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 08:37:49,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 08:37:49,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 08:37:49,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 08:37:49,318 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 08:37:49,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 08:37:49,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 08:37:49,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 08:37:49,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 08:37:49,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 08:37:49,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 08:37:49,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 08:37:49,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 08:37:49,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ffdaeeffc8c5fdb555812137dbba1199bd1a626d [2019-11-20 08:37:49,470 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 08:37:49,487 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 08:37:49,490 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 08:37:49,497 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 08:37:49,497 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 08:37:49,499 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2019-11-20 08:37:49,550 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/data/3afcc43a7/2e65681e797042eb8d2eeca0b5e75257/FLAG1a84f8001 [2019-11-20 08:37:49,929 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 08:37:49,929 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2019-11-20 08:37:49,938 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/data/3afcc43a7/2e65681e797042eb8d2eeca0b5e75257/FLAG1a84f8001 [2019-11-20 08:37:50,370 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/data/3afcc43a7/2e65681e797042eb8d2eeca0b5e75257 [2019-11-20 08:37:50,373 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 08:37:50,375 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 08:37:50,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 08:37:50,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 08:37:50,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 08:37:50,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:37:50" (1/1) ... [2019-11-20 08:37:50,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3279221c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:37:50, skipping insertion in model container [2019-11-20 08:37:50,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:37:50" (1/1) ... [2019-11-20 08:37:50,399 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 08:37:50,419 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 08:37:50,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 08:37:50,561 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 08:37:50,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 08:37:50,645 INFO L192 MainTranslator]: Completed translation [2019-11-20 08:37:50,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:37:50 WrapperNode [2019-11-20 08:37:50,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 08:37:50,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 08:37:50,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 08:37:50,646 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 08:37:50,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:37:50" (1/1) ... [2019-11-20 08:37:50,666 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:37:50" (1/1) ... [2019-11-20 08:37:50,679 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 08:37:50,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 08:37:50,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 08:37:50,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 08:37:50,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:37:50" (1/1) ... [2019-11-20 08:37:50,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:37:50" (1/1) ... [2019-11-20 08:37:50,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:37:50" (1/1) ... [2019-11-20 08:37:50,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:37:50" (1/1) ... [2019-11-20 08:37:50,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:37:50" (1/1) ... [2019-11-20 08:37:50,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:37:50" (1/1) ... [2019-11-20 08:37:50,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:37:50" (1/1) ... [2019-11-20 08:37:50,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 08:37:50,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 08:37:50,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 08:37:50,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 08:37:50,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:37:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 08:37:50,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 08:37:50,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 08:37:50,744 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-11-20 08:37:50,744 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-11-20 08:37:50,744 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-11-20 08:37:50,744 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-11-20 08:37:50,947 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 08:37:50,947 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 08:37:50,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:37:50 BoogieIcfgContainer [2019-11-20 08:37:50,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 08:37:50,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 08:37:50,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 08:37:50,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 08:37:50,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:37:50" (1/3) ... [2019-11-20 08:37:50,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c4c744b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:37:50, skipping insertion in model container [2019-11-20 08:37:50,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:37:50" (2/3) ... [2019-11-20 08:37:50,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c4c744b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:37:50, skipping insertion in model container [2019-11-20 08:37:50,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:37:50" (3/3) ... [2019-11-20 08:37:50,962 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2019-11-20 08:37:50,970 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 08:37:50,976 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 08:37:50,985 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 08:37:51,011 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 08:37:51,011 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 08:37:51,011 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 08:37:51,012 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 08:37:51,012 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 08:37:51,012 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 08:37:51,012 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 08:37:51,012 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 08:37:51,027 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-20 08:37:51,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 08:37:51,032 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:37:51,033 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:37:51,033 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 08:37:51,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:37:51,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-11-20 08:37:51,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 08:37:51,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118468987] [2019-11-20 08:37:51,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 08:37:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:37:51,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118468987] [2019-11-20 08:37:51,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:37:51,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 08:37:51,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170605277] [2019-11-20 08:37:51,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 08:37:51,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 08:37:51,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 08:37:51,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 08:37:51,224 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-11-20 08:37:51,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:37:51,322 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-20 08:37:51,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 08:37:51,324 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-20 08:37:51,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:37:51,333 INFO L225 Difference]: With dead ends: 38 [2019-11-20 08:37:51,333 INFO L226 Difference]: Without dead ends: 26 [2019-11-20 08:37:51,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 08:37:51,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-20 08:37:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-20 08:37:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 08:37:51,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-20 08:37:51,373 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-11-20 08:37:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:37:51,373 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-20 08:37:51,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 08:37:51,374 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-20 08:37:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 08:37:51,375 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:37:51,375 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:37:51,375 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 08:37:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:37:51,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-11-20 08:37:51,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 08:37:51,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444940000] [2019-11-20 08:37:51,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 08:37:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:37:51,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444940000] [2019-11-20 08:37:51,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:37:51,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 08:37:51,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492715345] [2019-11-20 08:37:51,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 08:37:51,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 08:37:51,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 08:37:51,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 08:37:51,420 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2019-11-20 08:37:51,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:37:51,502 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-20 08:37:51,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 08:37:51,503 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-20 08:37:51,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:37:51,504 INFO L225 Difference]: With dead ends: 32 [2019-11-20 08:37:51,504 INFO L226 Difference]: Without dead ends: 28 [2019-11-20 08:37:51,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 08:37:51,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-20 08:37:51,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-20 08:37:51,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 08:37:51,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-20 08:37:51,512 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-11-20 08:37:51,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:37:51,512 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-20 08:37:51,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 08:37:51,514 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-20 08:37:51,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 08:37:51,515 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:37:51,516 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:37:51,516 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 08:37:51,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:37:51,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-11-20 08:37:51,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 08:37:51,518 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220122720] [2019-11-20 08:37:51,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 08:37:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 08:37:51,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220122720] [2019-11-20 08:37:51,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78192014] [2019-11-20 08:37:51,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:37:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:51,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 08:37:51,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:37:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 08:37:51,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:37:51,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-20 08:37:51,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923272245] [2019-11-20 08:37:51,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 08:37:51,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 08:37:51,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 08:37:51,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-20 08:37:51,802 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 10 states. [2019-11-20 08:37:51,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:37:51,976 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-11-20 08:37:51,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 08:37:51,978 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-11-20 08:37:51,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:37:51,979 INFO L225 Difference]: With dead ends: 59 [2019-11-20 08:37:51,979 INFO L226 Difference]: Without dead ends: 35 [2019-11-20 08:37:51,980 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 08:37:51,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-20 08:37:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-20 08:37:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-20 08:37:51,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-11-20 08:37:51,991 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-11-20 08:37:51,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:37:51,993 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-11-20 08:37:51,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 08:37:51,993 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-11-20 08:37:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 08:37:51,995 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:37:51,995 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:37:52,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:37:52,200 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 08:37:52,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:37:52,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-11-20 08:37:52,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 08:37:52,201 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2721471] [2019-11-20 08:37:52,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 08:37:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 08:37:52,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2721471] [2019-11-20 08:37:52,314 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221845240] [2019-11-20 08:37:52,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:37:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:52,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 08:37:52,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:37:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 08:37:52,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:37:52,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-20 08:37:52,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728065562] [2019-11-20 08:37:52,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 08:37:52,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 08:37:52,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 08:37:52,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-20 08:37:52,443 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 10 states. [2019-11-20 08:37:52,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:37:52,696 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-11-20 08:37:52,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 08:37:52,697 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-20 08:37:52,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:37:52,700 INFO L225 Difference]: With dead ends: 55 [2019-11-20 08:37:52,700 INFO L226 Difference]: Without dead ends: 51 [2019-11-20 08:37:52,701 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 08:37:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-20 08:37:52,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-20 08:37:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-20 08:37:52,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-11-20 08:37:52,727 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-11-20 08:37:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:37:52,728 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-11-20 08:37:52,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 08:37:52,729 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-11-20 08:37:52,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 08:37:52,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:37:52,733 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:37:52,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:37:52,946 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 08:37:52,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:37:52,946 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-11-20 08:37:52,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 08:37:52,946 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217480931] [2019-11-20 08:37:52,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 08:37:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 08:37:53,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217480931] [2019-11-20 08:37:53,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229540026] [2019-11-20 08:37:53,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:37:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:53,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 08:37:53,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:37:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 08:37:53,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:37:53,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-11-20 08:37:53,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775230821] [2019-11-20 08:37:53,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 08:37:53,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 08:37:53,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 08:37:53,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 08:37:53,215 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 12 states. [2019-11-20 08:37:53,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:37:53,571 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-11-20 08:37:53,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 08:37:53,572 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-20 08:37:53,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:37:53,574 INFO L225 Difference]: With dead ends: 114 [2019-11-20 08:37:53,574 INFO L226 Difference]: Without dead ends: 68 [2019-11-20 08:37:53,576 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-11-20 08:37:53,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-20 08:37:53,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-11-20 08:37:53,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-20 08:37:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-11-20 08:37:53,594 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-11-20 08:37:53,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:37:53,594 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-11-20 08:37:53,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 08:37:53,594 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-11-20 08:37:53,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 08:37:53,596 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:37:53,596 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:37:53,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:37:53,804 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 08:37:53,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:37:53,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-11-20 08:37:53,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 08:37:53,804 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108709539] [2019-11-20 08:37:53,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 08:37:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 08:37:53,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108709539] [2019-11-20 08:37:53,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478246490] [2019-11-20 08:37:53,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:37:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:53,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 08:37:53,954 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:37:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 08:37:54,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:37:54,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2019-11-20 08:37:54,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232858157] [2019-11-20 08:37:54,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 08:37:54,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 08:37:54,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 08:37:54,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-11-20 08:37:54,045 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 12 states. [2019-11-20 08:37:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:37:54,362 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-11-20 08:37:54,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 08:37:54,363 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-11-20 08:37:54,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:37:54,365 INFO L225 Difference]: With dead ends: 147 [2019-11-20 08:37:54,365 INFO L226 Difference]: Without dead ends: 83 [2019-11-20 08:37:54,368 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-11-20 08:37:54,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-20 08:37:54,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-11-20 08:37:54,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-20 08:37:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-11-20 08:37:54,381 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-11-20 08:37:54,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:37:54,382 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-11-20 08:37:54,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 08:37:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-11-20 08:37:54,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-20 08:37:54,384 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:37:54,385 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:37:54,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:37:54,591 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 08:37:54,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:37:54,592 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-11-20 08:37:54,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 08:37:54,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792520633] [2019-11-20 08:37:54,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 08:37:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-20 08:37:54,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792520633] [2019-11-20 08:37:54,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798627536] [2019-11-20 08:37:54,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:37:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:54,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 08:37:54,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:37:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-20 08:37:54,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:37:54,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2019-11-20 08:37:54,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284533083] [2019-11-20 08:37:54,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 08:37:54,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 08:37:54,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 08:37:54,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-11-20 08:37:54,941 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 15 states. [2019-11-20 08:37:55,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:37:55,284 INFO L93 Difference]: Finished difference Result 163 states and 263 transitions. [2019-11-20 08:37:55,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 08:37:55,287 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2019-11-20 08:37:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:37:55,289 INFO L225 Difference]: With dead ends: 163 [2019-11-20 08:37:55,289 INFO L226 Difference]: Without dead ends: 99 [2019-11-20 08:37:55,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2019-11-20 08:37:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-20 08:37:55,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2019-11-20 08:37:55,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-20 08:37:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 143 transitions. [2019-11-20 08:37:55,306 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 143 transitions. Word has length 50 [2019-11-20 08:37:55,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:37:55,307 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 143 transitions. [2019-11-20 08:37:55,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 08:37:55,307 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 143 transitions. [2019-11-20 08:37:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-20 08:37:55,310 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:37:55,311 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:37:55,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:37:55,514 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 08:37:55,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:37:55,514 INFO L82 PathProgramCache]: Analyzing trace with hash -751947822, now seen corresponding path program 1 times [2019-11-20 08:37:55,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 08:37:55,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392102773] [2019-11-20 08:37:55,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 08:37:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-20 08:37:55,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392102773] [2019-11-20 08:37:55,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816291118] [2019-11-20 08:37:55,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:37:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:55,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 08:37:55,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:37:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-20 08:37:55,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:37:55,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2019-11-20 08:37:55,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51185916] [2019-11-20 08:37:55,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 08:37:55,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 08:37:55,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 08:37:55,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-11-20 08:37:55,806 INFO L87 Difference]: Start difference. First operand 91 states and 143 transitions. Second operand 15 states. [2019-11-20 08:37:56,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:37:56,140 INFO L93 Difference]: Finished difference Result 182 states and 293 transitions. [2019-11-20 08:37:56,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 08:37:56,141 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2019-11-20 08:37:56,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:37:56,142 INFO L225 Difference]: With dead ends: 182 [2019-11-20 08:37:56,142 INFO L226 Difference]: Without dead ends: 91 [2019-11-20 08:37:56,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2019-11-20 08:37:56,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-20 08:37:56,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2019-11-20 08:37:56,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-20 08:37:56,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 123 transitions. [2019-11-20 08:37:56,169 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 123 transitions. Word has length 51 [2019-11-20 08:37:56,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:37:56,170 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 123 transitions. [2019-11-20 08:37:56,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 08:37:56,171 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 123 transitions. [2019-11-20 08:37:56,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-20 08:37:56,177 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:37:56,177 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:37:56,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:37:56,389 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 08:37:56,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:37:56,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1674024370, now seen corresponding path program 2 times [2019-11-20 08:37:56,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 08:37:56,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696129206] [2019-11-20 08:37:56,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 08:37:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 36 proven. 41 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-20 08:37:56,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696129206] [2019-11-20 08:37:56,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270304605] [2019-11-20 08:37:56,699 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:37:56,751 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 08:37:56,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 08:37:56,752 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 08:37:56,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:37:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 44 proven. 16 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-20 08:37:56,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:37:56,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 22 [2019-11-20 08:37:56,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849667391] [2019-11-20 08:37:56,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-20 08:37:56,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 08:37:56,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 08:37:56,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2019-11-20 08:37:56,885 INFO L87 Difference]: Start difference. First operand 83 states and 123 transitions. Second operand 22 states. [2019-11-20 08:37:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:37:57,516 INFO L93 Difference]: Finished difference Result 193 states and 345 transitions. [2019-11-20 08:37:57,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-20 08:37:57,517 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 77 [2019-11-20 08:37:57,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:37:57,518 INFO L225 Difference]: With dead ends: 193 [2019-11-20 08:37:57,518 INFO L226 Difference]: Without dead ends: 87 [2019-11-20 08:37:57,520 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2019-11-20 08:37:57,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-20 08:37:57,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2019-11-20 08:37:57,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-20 08:37:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2019-11-20 08:37:57,529 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 77 [2019-11-20 08:37:57,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:37:57,530 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2019-11-20 08:37:57,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-20 08:37:57,530 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2019-11-20 08:37:57,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-20 08:37:57,531 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:37:57,532 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:37:57,735 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:37:57,735 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 08:37:57,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:37:57,736 INFO L82 PathProgramCache]: Analyzing trace with hash -26046796, now seen corresponding path program 1 times [2019-11-20 08:37:57,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 08:37:57,736 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744361522] [2019-11-20 08:37:57,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 08:37:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-20 08:37:58,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744361522] [2019-11-20 08:37:58,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234032819] [2019-11-20 08:37:58,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:37:58,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:58,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-20 08:37:58,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:37:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-20 08:37:58,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:37:58,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2019-11-20 08:37:58,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200006874] [2019-11-20 08:37:58,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 08:37:58,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 08:37:58,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 08:37:58,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2019-11-20 08:37:58,425 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand 21 states. [2019-11-20 08:37:58,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:37:58,578 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2019-11-20 08:37:58,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 08:37:58,579 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2019-11-20 08:37:58,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:37:58,580 INFO L225 Difference]: With dead ends: 87 [2019-11-20 08:37:58,580 INFO L226 Difference]: Without dead ends: 83 [2019-11-20 08:37:58,581 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2019-11-20 08:37:58,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-20 08:37:58,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2019-11-20 08:37:58,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-20 08:37:58,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2019-11-20 08:37:58,591 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 64 [2019-11-20 08:37:58,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:37:58,592 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2019-11-20 08:37:58,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 08:37:58,592 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2019-11-20 08:37:58,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-20 08:37:58,594 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:37:58,595 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:37:58,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:37:58,799 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 08:37:58,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:37:58,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1985146669, now seen corresponding path program 1 times [2019-11-20 08:37:58,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 08:37:58,808 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550981772] [2019-11-20 08:37:58,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 08:37:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-20 08:37:59,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550981772] [2019-11-20 08:37:59,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935690046] [2019-11-20 08:37:59,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:37:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:37:59,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 08:37:59,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:37:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-11-20 08:37:59,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:37:59,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2019-11-20 08:37:59,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456700061] [2019-11-20 08:37:59,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 08:37:59,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 08:37:59,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 08:37:59,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2019-11-20 08:37:59,177 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 17 states. [2019-11-20 08:37:59,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:37:59,372 INFO L93 Difference]: Finished difference Result 132 states and 176 transitions. [2019-11-20 08:37:59,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 08:37:59,372 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2019-11-20 08:37:59,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:37:59,373 INFO L225 Difference]: With dead ends: 132 [2019-11-20 08:37:59,373 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 08:37:59,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2019-11-20 08:37:59,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 08:37:59,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 08:37:59,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 08:37:59,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 08:37:59,375 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 78 [2019-11-20 08:37:59,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:37:59,375 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 08:37:59,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 08:37:59,375 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 08:37:59,375 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 08:37:59,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:37:59,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 08:38:00,001 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 13 [2019-11-20 08:38:00,201 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2019-11-20 08:38:00,204 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 08:38:00,204 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 08:38:00,204 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 08:38:00,204 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-11-20 08:38:00,204 INFO L440 ceAbstractionStarter]: At program point L41(lines 35 42) the Hoare annotation is: (<= 4 ULTIMATE.start_main_~x~0) [2019-11-20 08:38:00,204 INFO L444 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2019-11-20 08:38:00,204 INFO L444 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-11-20 08:38:00,205 INFO L440 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 4) (<= 4 ULTIMATE.start_main_~x~0)) [2019-11-20 08:38:00,205 INFO L444 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-11-20 08:38:00,205 INFO L444 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-11-20 08:38:00,205 INFO L447 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2019-11-20 08:38:00,205 INFO L440 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 1)) (= fibo2_~n |fibo2_#in~n|)) [2019-11-20 08:38:00,205 INFO L444 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-11-20 08:38:00,205 INFO L440 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (< 1 fibo2_~n) (or (<= 4 fibo2_~n) (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1))) (= fibo2_~n |fibo2_#in~n|)) [2019-11-20 08:38:00,205 INFO L444 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2019-11-20 08:38:00,205 INFO L444 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2019-11-20 08:38:00,205 INFO L444 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2019-11-20 08:38:00,206 INFO L444 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2019-11-20 08:38:00,206 INFO L444 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2019-11-20 08:38:00,206 INFO L447 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2019-11-20 08:38:00,206 INFO L440 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|)) [2019-11-20 08:38:00,206 INFO L444 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-11-20 08:38:00,206 INFO L440 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 2)) (or (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) (<= 4 fibo1_~n)) (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#in~n| 3) (<= |fibo1_#t~ret0| 1)) (<= 5 |fibo1_#in~n|)) (= fibo1_~n |fibo1_#in~n|)) [2019-11-20 08:38:00,206 INFO L444 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2019-11-20 08:38:00,206 INFO L444 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2019-11-20 08:38:00,206 INFO L444 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-11-20 08:38:00,206 INFO L444 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2019-11-20 08:38:00,206 INFO L444 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2019-11-20 08:38:00,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 08:38:00 BoogieIcfgContainer [2019-11-20 08:38:00,221 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 08:38:00,221 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 08:38:00,222 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 08:38:00,222 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 08:38:00,223 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:37:50" (3/4) ... [2019-11-20 08:38:00,227 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 08:38:00,234 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2019-11-20 08:38:00,235 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2019-11-20 08:38:00,246 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-20 08:38:00,246 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 08:38:00,306 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3f1a6672-2496-47d9-b947-9e97da873691/bin/uautomizer/witness.graphml [2019-11-20 08:38:00,306 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 08:38:00,308 INFO L168 Benchmark]: Toolchain (without parser) took 9933.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 184.0 MB). Free memory was 943.4 MB in the beginning and 977.8 MB in the end (delta: -34.4 MB). Peak memory consumption was 149.6 MB. Max. memory is 11.5 GB. [2019-11-20 08:38:00,308 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 08:38:00,308 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -189.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-20 08:38:00,309 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.02 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 08:38:00,309 INFO L168 Benchmark]: Boogie Preprocessor took 13.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-20 08:38:00,309 INFO L168 Benchmark]: RCFGBuilder took 255.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-11-20 08:38:00,310 INFO L168 Benchmark]: TraceAbstraction took 9272.11 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 48.2 MB). Free memory was 1.1 GB in the beginning and 979.8 MB in the end (delta: 133.8 MB). Peak memory consumption was 182.0 MB. Max. memory is 11.5 GB. [2019-11-20 08:38:00,310 INFO L168 Benchmark]: Witness Printer took 84.99 ms. Allocated memory is still 1.2 GB. Free memory was 979.8 MB in the beginning and 977.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. [2019-11-20 08:38:00,312 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 270.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -189.9 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 33.02 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 255.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9272.11 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 48.2 MB). Free memory was 1.1 GB in the beginning and 979.8 MB in the end (delta: 133.8 MB). Peak memory consumption was 182.0 MB. Max. memory is 11.5 GB. * Witness Printer took 84.99 ms. Allocated memory is still 1.2 GB. Free memory was 979.8 MB in the beginning and 977.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 4 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: SAFE, OverallTime: 9.1s, OverallIterations: 11, TraceHistogramMax: 7, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, HoareTripleCheckerStatistics: 275 SDtfs, 393 SDslu, 1861 SDs, 0 SdLazy, 2360 SolverSat, 326 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 706 GetRequests, 537 SyntacticMatches, 7 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 63 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 311 PreInvPairs, 397 NumberOfFragments, 78 HoareAnnotationTreeSize, 311 FomulaSimplifications, 1134 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1164 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 891 NumberOfCodeBlocks, 891 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 871 ConstructedInterpolants, 0 QuantifiedInterpolants, 114027 SizeOfPredicates, 31 NumberOfNonLiveVariables, 986 ConjunctsInSsa, 101 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 686/962 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...