./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/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 9448a6696b4991e038dda55623feb6ffc9366da0 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-25 08:46:17,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:46:17,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:46:17,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:46:17,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:46:17,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:46:17,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:46:17,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:46:17,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:46:17,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:46:17,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:46:17,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:46:17,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:46:17,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:46:17,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:46:17,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:46:17,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:46:17,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:46:17,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:46:17,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:46:18,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:46:18,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:46:18,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:46:18,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:46:18,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:46:18,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:46:18,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:46:18,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:46:18,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:46:18,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:46:18,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:46:18,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:46:18,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:46:18,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:46:18,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:46:18,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:46:18,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:46:18,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:46:18,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:46:18,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:46:18,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:46:18,020 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:46:18,045 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:46:18,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:46:18,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:46:18,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:46:18,047 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:46:18,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:46:18,047 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:46:18,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:46:18,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:46:18,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:46:18,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:46:18,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:46:18,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:46:18,048 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:46:18,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:46:18,048 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:46:18,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:46:18,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:46:18,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:46:18,049 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:46:18,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:46:18,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:46:18,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:46:18,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:46:18,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:46:18,050 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:46:18,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:46:18,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:46:18,050 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_e32689ff-41bd-42e6-bec8-ba9c849daf1e/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 -> 9448a6696b4991e038dda55623feb6ffc9366da0 [2019-11-25 08:46:18,202 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:46:18,216 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:46:18,219 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:46:18,227 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:46:18,227 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:46:18,229 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c [2019-11-25 08:46:18,307 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/bin/uautomizer/data/f2efa3280/0da304f40d234258ab83b58af69aba00/FLAG359fb875d [2019-11-25 08:46:18,767 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:46:18,768 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/sv-benchmarks/c/recursive-simple/id2_i5_o5-2.c [2019-11-25 08:46:18,773 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/bin/uautomizer/data/f2efa3280/0da304f40d234258ab83b58af69aba00/FLAG359fb875d [2019-11-25 08:46:19,190 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/bin/uautomizer/data/f2efa3280/0da304f40d234258ab83b58af69aba00 [2019-11-25 08:46:19,193 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:46:19,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:46:19,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:46:19,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:46:19,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:46:19,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43b7358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19, skipping insertion in model container [2019-11-25 08:46:19,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:46:19,221 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:46:19,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:46:19,391 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:46:19,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:46:19,471 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:46:19,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19 WrapperNode [2019-11-25 08:46:19,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:46:19,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:46:19,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:46:19,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:46:19,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,497 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:46:19,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:46:19,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:46:19,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:46:19,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... [2019-11-25 08:46:19,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:46:19,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:46:19,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:46:19,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:46:19,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:46:19,571 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2019-11-25 08:46:19,571 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2019-11-25 08:46:19,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:46:19,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:46:19,571 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-25 08:46:19,572 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-25 08:46:19,734 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:46:19,734 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-25 08:46:19,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:46:19 BoogieIcfgContainer [2019-11-25 08:46:19,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:46:19,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:46:19,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:46:19,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:46:19,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:46:19" (1/3) ... [2019-11-25 08:46:19,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42594254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:46:19, skipping insertion in model container [2019-11-25 08:46:19,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:19" (2/3) ... [2019-11-25 08:46:19,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42594254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:46:19, skipping insertion in model container [2019-11-25 08:46:19,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:46:19" (3/3) ... [2019-11-25 08:46:19,743 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-2.c [2019-11-25 08:46:19,765 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:46:19,786 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:46:19,797 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:46:19,832 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:46:19,832 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:46:19,832 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:46:19,832 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:46:19,832 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:46:19,833 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:46:19,833 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:46:19,833 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:46:19,857 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-25 08:46:19,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-25 08:46:19,862 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:19,863 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:19,863 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:19,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2105267373, now seen corresponding path program 1 times [2019-11-25 08:46:19,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:19,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554965122] [2019-11-25 08:46:19,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:46:20,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554965122] [2019-11-25 08:46:20,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:46:20,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:46:20,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351601034] [2019-11-25 08:46:20,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:46:20,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:20,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:46:20,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:46:20,086 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2019-11-25 08:46:20,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:20,169 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-11-25 08:46:20,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:46:20,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-25 08:46:20,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:20,180 INFO L225 Difference]: With dead ends: 30 [2019-11-25 08:46:20,180 INFO L226 Difference]: Without dead ends: 20 [2019-11-25 08:46:20,183 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 [2019-11-25 08:46:20,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-25 08:46:20,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-25 08:46:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-25 08:46:20,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-25 08:46:20,219 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2019-11-25 08:46:20,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:20,220 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-25 08:46:20,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:46:20,220 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-25 08:46:20,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-25 08:46:20,221 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:20,222 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:20,222 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:20,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:20,222 INFO L82 PathProgramCache]: Analyzing trace with hash -131148366, now seen corresponding path program 1 times [2019-11-25 08:46:20,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:20,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849830890] [2019-11-25 08:46:20,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:46:20,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849830890] [2019-11-25 08:46:20,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:46:20,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-25 08:46:20,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333475621] [2019-11-25 08:46:20,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:46:20,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:20,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:46:20,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:46:20,333 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2019-11-25 08:46:20,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:20,439 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-11-25 08:46:20,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:46:20,440 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-25 08:46:20,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:20,441 INFO L225 Difference]: With dead ends: 29 [2019-11-25 08:46:20,441 INFO L226 Difference]: Without dead ends: 25 [2019-11-25 08:46:20,443 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:46:20,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-25 08:46:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-11-25 08:46:20,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-25 08:46:20,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-25 08:46:20,452 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2019-11-25 08:46:20,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:20,452 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-25 08:46:20,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:46:20,453 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-25 08:46:20,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-25 08:46:20,454 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:20,455 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:20,455 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:20,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:20,456 INFO L82 PathProgramCache]: Analyzing trace with hash -132605643, now seen corresponding path program 1 times [2019-11-25 08:46:20,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:20,458 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105235495] [2019-11-25 08:46:20,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:46:20,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105235495] [2019-11-25 08:46:20,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825769526] [2019-11-25 08:46:20,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:20,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:46:20,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:46:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:46:20,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:46:20,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2019-11-25 08:46:20,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144848980] [2019-11-25 08:46:20,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-25 08:46:20,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:20,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-25 08:46:20,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:46:20,812 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 11 states. [2019-11-25 08:46:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:20,945 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-11-25 08:46:20,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:46:20,946 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-11-25 08:46:20,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:20,948 INFO L225 Difference]: With dead ends: 35 [2019-11-25 08:46:20,948 INFO L226 Difference]: Without dead ends: 31 [2019-11-25 08:46:20,949 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:46:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-25 08:46:20,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-11-25 08:46:20,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:46:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-25 08:46:20,958 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2019-11-25 08:46:20,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:20,958 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-25 08:46:20,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-25 08:46:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-25 08:46:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-25 08:46:20,960 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:20,960 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:21,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:21,167 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:21,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:21,168 INFO L82 PathProgramCache]: Analyzing trace with hash -614490246, now seen corresponding path program 1 times [2019-11-25 08:46:21,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:21,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956296641] [2019-11-25 08:46:21,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-25 08:46:21,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956296641] [2019-11-25 08:46:21,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108070853] [2019-11-25 08:46:21,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:21,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:46:21,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:46:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-25 08:46:21,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:46:21,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2019-11-25 08:46:21,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934387910] [2019-11-25 08:46:21,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:46:21,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:21,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:46:21,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:46:21,486 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 12 states. [2019-11-25 08:46:21,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:21,643 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-11-25 08:46:21,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:46:21,645 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-25 08:46:21,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:21,647 INFO L225 Difference]: With dead ends: 41 [2019-11-25 08:46:21,647 INFO L226 Difference]: Without dead ends: 37 [2019-11-25 08:46:21,648 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:46:21,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-25 08:46:21,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2019-11-25 08:46:21,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-25 08:46:21,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-11-25 08:46:21,664 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2019-11-25 08:46:21,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:21,666 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-11-25 08:46:21,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:46:21,666 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-11-25 08:46:21,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-25 08:46:21,670 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:21,670 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:21,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:21,883 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:21,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:21,883 INFO L82 PathProgramCache]: Analyzing trace with hash -2127867459, now seen corresponding path program 2 times [2019-11-25 08:46:21,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:21,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546448535] [2019-11-25 08:46:21,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-25 08:46:22,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546448535] [2019-11-25 08:46:22,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987298375] [2019-11-25 08:46:22,070 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:22,107 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:46:22,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:46:22,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-25 08:46:22,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:46:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-25 08:46:22,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:46:22,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2019-11-25 08:46:22,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091275737] [2019-11-25 08:46:22,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-25 08:46:22,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:22,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-25 08:46:22,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:46:22,175 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 13 states. [2019-11-25 08:46:22,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:22,298 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-11-25 08:46:22,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:46:22,302 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-11-25 08:46:22,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:22,303 INFO L225 Difference]: With dead ends: 47 [2019-11-25 08:46:22,303 INFO L226 Difference]: Without dead ends: 43 [2019-11-25 08:46:22,304 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:46:22,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-25 08:46:22,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2019-11-25 08:46:22,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-25 08:46:22,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-25 08:46:22,314 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 33 [2019-11-25 08:46:22,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:22,314 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-25 08:46:22,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-25 08:46:22,314 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-25 08:46:22,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-25 08:46:22,315 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:22,315 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:22,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:22,518 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:22,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:22,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1002836670, now seen corresponding path program 2 times [2019-11-25 08:46:22,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:22,518 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344389037] [2019-11-25 08:46:22,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-25 08:46:22,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344389037] [2019-11-25 08:46:22,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761795069] [2019-11-25 08:46:22,900 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:22,942 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:46:22,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:46:22,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-25 08:46:22,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:46:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-25 08:46:22,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:46:22,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2019-11-25 08:46:22,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251322096] [2019-11-25 08:46:22,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-25 08:46:22,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:22,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-25 08:46:22,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-11-25 08:46:22,980 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 15 states. [2019-11-25 08:46:23,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:23,083 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2019-11-25 08:46:23,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-25 08:46:23,084 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2019-11-25 08:46:23,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:23,085 INFO L225 Difference]: With dead ends: 53 [2019-11-25 08:46:23,085 INFO L226 Difference]: Without dead ends: 49 [2019-11-25 08:46:23,086 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-11-25 08:46:23,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-25 08:46:23,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2019-11-25 08:46:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-25 08:46:23,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-11-25 08:46:23,092 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 39 [2019-11-25 08:46:23,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:23,092 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-11-25 08:46:23,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-25 08:46:23,093 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-11-25 08:46:23,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-25 08:46:23,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:23,095 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:23,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:23,302 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:23,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:23,302 INFO L82 PathProgramCache]: Analyzing trace with hash 688258629, now seen corresponding path program 3 times [2019-11-25 08:46:23,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:23,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142104183] [2019-11-25 08:46:23,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-25 08:46:23,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142104183] [2019-11-25 08:46:23,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387886386] [2019-11-25 08:46:23,506 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:23,552 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-25 08:46:23,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:46:23,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:46:23,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:46:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-25 08:46:23,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:46:23,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 15 [2019-11-25 08:46:23,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590475258] [2019-11-25 08:46:23,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:46:23,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:23,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:46:23,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-11-25 08:46:23,620 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2019-11-25 08:46:23,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:23,829 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2019-11-25 08:46:23,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-25 08:46:23,829 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2019-11-25 08:46:23,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:23,830 INFO L225 Difference]: With dead ends: 59 [2019-11-25 08:46:23,831 INFO L226 Difference]: Without dead ends: 35 [2019-11-25 08:46:23,831 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2019-11-25 08:46:23,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-25 08:46:23,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-25 08:46:23,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-25 08:46:23,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-25 08:46:23,837 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2019-11-25 08:46:23,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:23,837 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-25 08:46:23,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:46:23,837 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-25 08:46:23,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-25 08:46:23,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:23,839 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:24,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:24,040 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:24,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:24,040 INFO L82 PathProgramCache]: Analyzing trace with hash -77349110, now seen corresponding path program 3 times [2019-11-25 08:46:24,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:24,040 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339476366] [2019-11-25 08:46:24,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-25 08:46:24,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339476366] [2019-11-25 08:46:24,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184759485] [2019-11-25 08:46:24,235 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:24,274 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-25 08:46:24,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:46:24,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-25 08:46:24,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:46:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-25 08:46:24,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:46:24,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 16 [2019-11-25 08:46:24,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718040090] [2019-11-25 08:46:24,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-25 08:46:24,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:24,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-25 08:46:24,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:46:24,350 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2019-11-25 08:46:24,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:24,533 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2019-11-25 08:46:24,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-25 08:46:24,534 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-11-25 08:46:24,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:24,535 INFO L225 Difference]: With dead ends: 35 [2019-11-25 08:46:24,535 INFO L226 Difference]: Without dead ends: 0 [2019-11-25 08:46:24,536 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2019-11-25 08:46:24,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-25 08:46:24,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-25 08:46:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-25 08:46:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-25 08:46:24,536 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2019-11-25 08:46:24,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:24,537 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:46:24,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-25 08:46:24,537 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-25 08:46:24,537 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-25 08:46:24,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:24,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-25 08:46:24,767 INFO L440 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (= id2_~x |id2_#in~x|) [2019-11-25 08:46:24,767 INFO L444 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2019-11-25 08:46:24,767 INFO L444 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2019-11-25 08:46:24,767 INFO L444 ceAbstractionStarter]: For program point id2EXIT(lines 12 15) no Hoare annotation was computed. [2019-11-25 08:46:24,768 INFO L447 ceAbstractionStarter]: At program point id2ENTRY(lines 12 15) the Hoare annotation is: true [2019-11-25 08:46:24,768 INFO L444 ceAbstractionStarter]: For program point id2FINAL(lines 12 15) no Hoare annotation was computed. [2019-11-25 08:46:24,768 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-25 08:46:24,768 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-25 08:46:24,768 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-25 08:46:24,768 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2019-11-25 08:46:24,768 INFO L444 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2019-11-25 08:46:24,768 INFO L444 ceAbstractionStarter]: For program point L20(lines 20 22) no Hoare annotation was computed. [2019-11-25 08:46:24,769 INFO L440 ceAbstractionStarter]: At program point L19(line 19) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~input~0) (<= ULTIMATE.start_main_~input~0 5)) [2019-11-25 08:46:24,769 INFO L444 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2019-11-25 08:46:24,769 INFO L444 ceAbstractionStarter]: For program point L17(lines 17 23) no Hoare annotation was computed. [2019-11-25 08:46:24,769 INFO L444 ceAbstractionStarter]: For program point idFINAL(lines 7 10) no Hoare annotation was computed. [2019-11-25 08:46:24,769 INFO L444 ceAbstractionStarter]: For program point idEXIT(lines 7 10) no Hoare annotation was computed. [2019-11-25 08:46:24,769 INFO L440 ceAbstractionStarter]: At program point L9(line 9) the Hoare annotation is: (= |id_#in~x| id_~x) [2019-11-25 08:46:24,769 INFO L444 ceAbstractionStarter]: For program point L8(line 8) no Hoare annotation was computed. [2019-11-25 08:46:24,769 INFO L444 ceAbstractionStarter]: For program point L9-1(line 9) no Hoare annotation was computed. [2019-11-25 08:46:24,770 INFO L447 ceAbstractionStarter]: At program point idENTRY(lines 7 10) the Hoare annotation is: true [2019-11-25 08:46:24,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:46:24 BoogieIcfgContainer [2019-11-25 08:46:24,772 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:46:24,772 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:46:24,772 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:46:24,773 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:46:24,773 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:46:19" (3/4) ... [2019-11-25 08:46:24,776 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-25 08:46:24,781 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2019-11-25 08:46:24,782 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-11-25 08:46:24,789 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-25 08:46:24,789 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-25 08:46:24,820 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e32689ff-41bd-42e6-bec8-ba9c849daf1e/bin/uautomizer/witness.graphml [2019-11-25 08:46:24,820 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:46:24,822 INFO L168 Benchmark]: Toolchain (without parser) took 5627.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 177.2 MB). Free memory was 944.8 MB in the beginning and 1.0 GB in the end (delta: -95.4 MB). Peak memory consumption was 81.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:24,822 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 962.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:46:24,822 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.42 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -142.9 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:24,823 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.36 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:46:24,823 INFO L168 Benchmark]: Boogie Preprocessor took 15.31 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:46:24,823 INFO L168 Benchmark]: RCFGBuilder took 222.90 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:24,824 INFO L168 Benchmark]: TraceAbstraction took 5035.66 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 80.2 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 27.9 MB). Peak memory consumption was 108.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:24,824 INFO L168 Benchmark]: Witness Printer took 47.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:24,826 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 962.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 277.42 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -142.9 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.36 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.31 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 222.90 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5035.66 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 80.2 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 27.9 MB). Peak memory consumption was 108.1 MB. Max. memory is 11.5 GB. * Witness Printer took 47.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 1 error locations. Result: SAFE, OverallTime: 4.9s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 146 SDtfs, 104 SDslu, 919 SDs, 0 SdLazy, 546 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 371 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 15 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 456 NumberOfCodeBlocks, 456 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 442 ConstructedInterpolants, 0 QuantifiedInterpolants, 44240 SizeOfPredicates, 33 NumberOfNonLiveVariables, 516 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 282/360 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...