./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_b3_o5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_b3_o5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/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 ceb806ae997f94b7f09b4e2dce31a0e63ff1a329 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 22:06:34,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 22:06:34,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 22:06:34,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 22:06:34,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 22:06:34,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 22:06:34,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 22:06:34,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 22:06:34,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 22:06:34,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 22:06:34,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 22:06:34,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 22:06:34,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 22:06:34,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 22:06:34,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 22:06:34,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 22:06:34,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 22:06:34,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 22:06:34,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 22:06:34,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 22:06:34,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 22:06:34,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 22:06:34,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 22:06:34,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 22:06:34,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 22:06:34,116 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 22:06:34,116 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 22:06:34,117 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 22:06:34,119 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 22:06:34,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 22:06:34,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 22:06:34,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 22:06:34,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 22:06:34,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 22:06:34,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 22:06:34,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 22:06:34,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 22:06:34,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 22:06:34,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 22:06:34,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 22:06:34,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 22:06:34,135 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 22:06:34,153 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 22:06:34,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 22:06:34,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 22:06:34,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 22:06:34,155 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 22:06:34,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 22:06:34,156 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 22:06:34,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 22:06:34,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 22:06:34,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 22:06:34,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 22:06:34,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 22:06:34,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 22:06:34,158 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 22:06:34,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 22:06:34,159 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 22:06:34,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 22:06:34,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 22:06:34,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 22:06:34,160 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 22:06:34,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 22:06:34,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:06:34,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 22:06:34,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 22:06:34,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 22:06:34,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 22:06:34,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 22:06:34,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 22:06:34,163 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_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/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 -> ceb806ae997f94b7f09b4e2dce31a0e63ff1a329 [2019-11-15 22:06:34,218 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 22:06:34,237 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 22:06:34,241 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 22:06:34,242 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 22:06:34,243 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 22:06:34,244 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id2_b3_o5.c [2019-11-15 22:06:34,323 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/bin/uautomizer/data/bcdbad594/5c3634fdca574a67babb2309c446092f/FLAG53bae7777 [2019-11-15 22:06:34,705 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 22:06:34,706 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/sv-benchmarks/c/recursive-simple/id2_b3_o5.c [2019-11-15 22:06:34,711 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/bin/uautomizer/data/bcdbad594/5c3634fdca574a67babb2309c446092f/FLAG53bae7777 [2019-11-15 22:06:35,089 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/bin/uautomizer/data/bcdbad594/5c3634fdca574a67babb2309c446092f [2019-11-15 22:06:35,091 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 22:06:35,093 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 22:06:35,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 22:06:35,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 22:06:35,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 22:06:35,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:06:35" (1/1) ... [2019-11-15 22:06:35,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a0c5f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:06:35, skipping insertion in model container [2019-11-15 22:06:35,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:06:35" (1/1) ... [2019-11-15 22:06:35,110 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 22:06:35,125 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 22:06:35,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:06:35,308 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 22:06:35,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:06:35,451 INFO L192 MainTranslator]: Completed translation [2019-11-15 22:06:35,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:06:35 WrapperNode [2019-11-15 22:06:35,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 22:06:35,454 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 22:06:35,454 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 22:06:35,454 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 22:06:35,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:06:35" (1/1) ... [2019-11-15 22:06:35,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:06:35" (1/1) ... [2019-11-15 22:06:35,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 22:06:35,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 22:06:35,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 22:06:35,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 22:06:35,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:06:35" (1/1) ... [2019-11-15 22:06:35,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:06:35" (1/1) ... [2019-11-15 22:06:35,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:06:35" (1/1) ... [2019-11-15 22:06:35,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:06:35" (1/1) ... [2019-11-15 22:06:35,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:06:35" (1/1) ... [2019-11-15 22:06:35,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:06:35" (1/1) ... [2019-11-15 22:06:35,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:06:35" (1/1) ... [2019-11-15 22:06:35,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 22:06:35,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 22:06:35,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 22:06:35,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 22:06:35,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:06:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:06:35,598 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2019-11-15 22:06:35,599 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2019-11-15 22:06:35,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 22:06:35,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 22:06:35,599 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-15 22:06:35,599 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-15 22:06:35,859 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 22:06:35,871 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-15 22:06:35,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:06:35 BoogieIcfgContainer [2019-11-15 22:06:35,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 22:06:35,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 22:06:35,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 22:06:35,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 22:06:35,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 10:06:35" (1/3) ... [2019-11-15 22:06:35,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@454a1f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:06:35, skipping insertion in model container [2019-11-15 22:06:35,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:06:35" (2/3) ... [2019-11-15 22:06:35,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@454a1f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:06:35, skipping insertion in model container [2019-11-15 22:06:35,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:06:35" (3/3) ... [2019-11-15 22:06:35,890 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o5.c [2019-11-15 22:06:35,914 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 22:06:35,922 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 22:06:35,944 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 22:06:35,976 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 22:06:35,976 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 22:06:35,978 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 22:06:35,979 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 22:06:35,979 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 22:06:35,980 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 22:06:35,980 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 22:06:35,980 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 22:06:36,010 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-15 22:06:36,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-15 22:06:36,017 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:06:36,017 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:06:36,021 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:06:36,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:06:36,028 INFO L82 PathProgramCache]: Analyzing trace with hash -394807891, now seen corresponding path program 1 times [2019-11-15 22:06:36,037 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:06:36,037 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565870814] [2019-11-15 22:06:36,038 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:06:36,038 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:06:36,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:06:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:36,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:06:36,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565870814] [2019-11-15 22:06:36,396 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:06:36,396 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 22:06:36,396 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907630741] [2019-11-15 22:06:36,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:06:36,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:06:36,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:06:36,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:06:36,419 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2019-11-15 22:06:36,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:06:36,472 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-11-15 22:06:36,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:06:36,475 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-15 22:06:36,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:06:36,485 INFO L225 Difference]: With dead ends: 35 [2019-11-15 22:06:36,485 INFO L226 Difference]: Without dead ends: 22 [2019-11-15 22:06:36,489 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:06:36,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-15 22:06:36,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-15 22:06:36,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-15 22:06:36,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-15 22:06:36,537 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 9 [2019-11-15 22:06:36,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:06:36,537 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-15 22:06:36,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:06:36,538 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-15 22:06:36,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-15 22:06:36,540 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:06:36,540 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:06:36,540 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:06:36,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:06:36,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1343664860, now seen corresponding path program 1 times [2019-11-15 22:06:36,541 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:06:36,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307921217] [2019-11-15 22:06:36,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:06:36,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:06:36,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:06:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:06:36,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307921217] [2019-11-15 22:06:36,677 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:06:36,677 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 22:06:36,678 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827799130] [2019-11-15 22:06:36,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:06:36,680 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:06:36,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:06:36,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:06:36,681 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2019-11-15 22:06:36,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:06:36,717 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-11-15 22:06:36,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:06:36,718 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-15 22:06:36,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:06:36,719 INFO L225 Difference]: With dead ends: 28 [2019-11-15 22:06:36,719 INFO L226 Difference]: Without dead ends: 24 [2019-11-15 22:06:36,720 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:06:36,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-15 22:06:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-11-15 22:06:36,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-15 22:06:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-15 22:06:36,727 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2019-11-15 22:06:36,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:06:36,727 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-15 22:06:36,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:06:36,727 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-15 22:06:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-15 22:06:36,729 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:06:36,729 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:06:36,729 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:06:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:06:36,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1372294011, now seen corresponding path program 1 times [2019-11-15 22:06:36,730 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:06:36,730 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706129325] [2019-11-15 22:06:36,730 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:06:36,731 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:06:36,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:06:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:06:36,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706129325] [2019-11-15 22:06:36,959 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:06:36,959 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-15 22:06:36,960 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009885884] [2019-11-15 22:06:36,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 22:06:36,960 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:06:36,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 22:06:36,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:06:36,961 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2019-11-15 22:06:37,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:06:37,072 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-11-15 22:06:37,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 22:06:37,076 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2019-11-15 22:06:37,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:06:37,078 INFO L225 Difference]: With dead ends: 44 [2019-11-15 22:06:37,078 INFO L226 Difference]: Without dead ends: 28 [2019-11-15 22:06:37,079 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-15 22:06:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-15 22:06:37,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-15 22:06:37,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 22:06:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-15 22:06:37,092 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-11-15 22:06:37,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:06:37,093 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-15 22:06:37,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 22:06:37,093 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-15 22:06:37,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-15 22:06:37,095 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:06:37,096 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:06:37,096 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:06:37,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:06:37,097 INFO L82 PathProgramCache]: Analyzing trace with hash -971845561, now seen corresponding path program 1 times [2019-11-15 22:06:37,097 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:06:37,097 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297203787] [2019-11-15 22:06:37,097 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:06:37,098 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:06:37,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:06:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 22:06:37,260 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297203787] [2019-11-15 22:06:37,261 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:06:37,261 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 22:06:37,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818710895] [2019-11-15 22:06:37,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:06:37,265 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:06:37,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:06:37,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:06:37,266 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2019-11-15 22:06:37,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:06:37,301 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2019-11-15 22:06:37,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:06:37,304 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-15 22:06:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:06:37,305 INFO L225 Difference]: With dead ends: 46 [2019-11-15 22:06:37,305 INFO L226 Difference]: Without dead ends: 32 [2019-11-15 22:06:37,306 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:06:37,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-15 22:06:37,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-11-15 22:06:37,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-15 22:06:37,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-15 22:06:37,319 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2019-11-15 22:06:37,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:06:37,320 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-15 22:06:37,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:06:37,320 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-15 22:06:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-15 22:06:37,323 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:06:37,324 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:06:37,324 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:06:37,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:06:37,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1168359066, now seen corresponding path program 1 times [2019-11-15 22:06:37,325 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:06:37,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580744459] [2019-11-15 22:06:37,327 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:06:37,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:06:37,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:06:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 22:06:37,643 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580744459] [2019-11-15 22:06:37,643 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023122345] [2019-11-15 22:06:37,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:06:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:37,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-15 22:06:37,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:06:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 22:06:37,821 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:06:37,822 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-15 22:06:37,822 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425645813] [2019-11-15 22:06:37,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 22:06:37,823 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:06:37,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 22:06:37,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-15 22:06:37,824 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 12 states. [2019-11-15 22:06:37,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:06:37,976 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2019-11-15 22:06:37,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-15 22:06:37,977 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-11-15 22:06:37,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:06:37,979 INFO L225 Difference]: With dead ends: 60 [2019-11-15 22:06:37,979 INFO L226 Difference]: Without dead ends: 40 [2019-11-15 22:06:37,980 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-11-15 22:06:37,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-15 22:06:37,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2019-11-15 22:06:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-15 22:06:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-15 22:06:37,991 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2019-11-15 22:06:37,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:06:37,992 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-15 22:06:37,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 22:06:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-15 22:06:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-15 22:06:37,993 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:06:37,993 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:06:38,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:06:38,194 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:06:38,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:06:38,195 INFO L82 PathProgramCache]: Analyzing trace with hash -222974932, now seen corresponding path program 1 times [2019-11-15 22:06:38,195 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:06:38,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272120094] [2019-11-15 22:06:38,196 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:06:38,196 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:06:38,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:06:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-15 22:06:38,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272120094] [2019-11-15 22:06:38,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722656350] [2019-11-15 22:06:38,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:06:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:38,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-15 22:06:38,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:06:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-15 22:06:38,777 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:06:38,777 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-15 22:06:38,777 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866384996] [2019-11-15 22:06:38,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-15 22:06:38,778 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:06:38,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-15 22:06:38,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2019-11-15 22:06:38,779 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 15 states. [2019-11-15 22:06:39,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:06:39,027 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2019-11-15 22:06:39,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-15 22:06:39,027 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2019-11-15 22:06:39,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:06:39,029 INFO L225 Difference]: With dead ends: 70 [2019-11-15 22:06:39,029 INFO L226 Difference]: Without dead ends: 50 [2019-11-15 22:06:39,030 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2019-11-15 22:06:39,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-15 22:06:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2019-11-15 22:06:39,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-15 22:06:39,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-11-15 22:06:39,039 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 30 [2019-11-15 22:06:39,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:06:39,040 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-11-15 22:06:39,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-15 22:06:39,040 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-11-15 22:06:39,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-15 22:06:39,042 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:06:39,042 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:06:39,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:06:39,257 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:06:39,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:06:39,258 INFO L82 PathProgramCache]: Analyzing trace with hash -141607649, now seen corresponding path program 2 times [2019-11-15 22:06:39,258 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:06:39,258 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635716500] [2019-11-15 22:06:39,259 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:06:39,259 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:06:39,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:06:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-15 22:06:39,651 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635716500] [2019-11-15 22:06:39,651 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007752689] [2019-11-15 22:06:39,652 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:06:39,700 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:06:39,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:06:39,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-15 22:06:39,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:06:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-15 22:06:39,810 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:06:39,810 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-15 22:06:39,810 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006332153] [2019-11-15 22:06:39,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-15 22:06:39,813 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:06:39,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-15 22:06:39,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2019-11-15 22:06:39,815 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 15 states. [2019-11-15 22:06:40,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:06:40,061 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2019-11-15 22:06:40,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-15 22:06:40,063 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2019-11-15 22:06:40,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:06:40,065 INFO L225 Difference]: With dead ends: 74 [2019-11-15 22:06:40,065 INFO L226 Difference]: Without dead ends: 56 [2019-11-15 22:06:40,066 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2019-11-15 22:06:40,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-15 22:06:40,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2019-11-15 22:06:40,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-15 22:06:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-15 22:06:40,083 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 37 [2019-11-15 22:06:40,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:06:40,085 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-15 22:06:40,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-15 22:06:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-15 22:06:40,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-15 22:06:40,090 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:06:40,090 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:06:40,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:06:40,300 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 22:06:40,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:06:40,300 INFO L82 PathProgramCache]: Analyzing trace with hash -90623267, now seen corresponding path program 2 times [2019-11-15 22:06:40,300 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:06:40,300 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557658457] [2019-11-15 22:06:40,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:06:40,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:06:40,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:06:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:06:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-15 22:06:40,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557658457] [2019-11-15 22:06:40,779 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091639856] [2019-11-15 22:06:40,779 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:06:40,828 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-15 22:06:40,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:06:40,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 22:06:40,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:06:40,948 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-15 22:06:40,948 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:06:40,948 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2019-11-15 22:06:40,949 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596204873] [2019-11-15 22:06:40,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:06:40,949 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:06:40,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:06:40,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-11-15 22:06:40,950 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 5 states. [2019-11-15 22:06:40,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:06:40,972 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2019-11-15 22:06:40,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:06:40,973 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2019-11-15 22:06:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:06:40,973 INFO L225 Difference]: With dead ends: 50 [2019-11-15 22:06:40,973 INFO L226 Difference]: Without dead ends: 0 [2019-11-15 22:06:40,975 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-11-15 22:06:40,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-15 22:06:40,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-15 22:06:40,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-15 22:06:40,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-15 22:06:40,976 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2019-11-15 22:06:40,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:06:40,976 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-15 22:06:40,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:06:40,976 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-15 22:06:40,976 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-15 22:06:41,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:06:41,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-15 22:06:41,199 INFO L443 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2019-11-15 22:06:41,200 INFO L446 ceAbstractionStarter]: At program point L16(line 16) the Hoare annotation is: true [2019-11-15 22:06:41,200 INFO L443 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2019-11-15 22:06:41,200 INFO L443 ceAbstractionStarter]: For program point L16-1(line 16) no Hoare annotation was computed. [2019-11-15 22:06:41,200 INFO L443 ceAbstractionStarter]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2019-11-15 22:06:41,200 INFO L446 ceAbstractionStarter]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2019-11-15 22:06:41,200 INFO L443 ceAbstractionStarter]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2019-11-15 22:06:41,200 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-15 22:06:41,201 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-15 22:06:41,201 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-15 22:06:41,201 INFO L443 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2019-11-15 22:06:41,201 INFO L443 ceAbstractionStarter]: For program point L24(lines 24 26) no Hoare annotation was computed. [2019-11-15 22:06:41,201 INFO L446 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: true [2019-11-15 22:06:41,201 INFO L443 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-11-15 22:06:41,201 INFO L443 ceAbstractionStarter]: For program point L21(lines 21 27) no Hoare annotation was computed. [2019-11-15 22:06:41,202 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2019-11-15 22:06:41,202 INFO L443 ceAbstractionStarter]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2019-11-15 22:06:41,202 INFO L443 ceAbstractionStarter]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2019-11-15 22:06:41,202 INFO L443 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2019-11-15 22:06:41,202 INFO L446 ceAbstractionStarter]: At program point L9(line 9) the Hoare annotation is: true [2019-11-15 22:06:41,202 INFO L443 ceAbstractionStarter]: For program point L8(line 8) no Hoare annotation was computed. [2019-11-15 22:06:41,203 INFO L443 ceAbstractionStarter]: For program point L9-1(line 9) no Hoare annotation was computed. [2019-11-15 22:06:41,203 INFO L446 ceAbstractionStarter]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2019-11-15 22:06:41,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 10:06:41 BoogieIcfgContainer [2019-11-15 22:06:41,206 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 22:06:41,207 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 22:06:41,207 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 22:06:41,207 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 22:06:41,208 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:06:35" (3/4) ... [2019-11-15 22:06:41,212 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-15 22:06:41,220 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2019-11-15 22:06:41,220 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-11-15 22:06:41,225 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-15 22:06:41,225 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-15 22:06:41,275 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ee0ebaa6-4493-490d-8db5-8db4c5d2cb11/bin/uautomizer/witness.graphml [2019-11-15 22:06:41,276 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 22:06:41,278 INFO L168 Benchmark]: Toolchain (without parser) took 6184.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 212.9 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -186.1 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. [2019-11-15 22:06:41,278 INFO L168 Benchmark]: CDTParser took 0.24 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. [2019-11-15 22:06:41,279 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -198.4 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-15 22:06:41,279 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.06 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. [2019-11-15 22:06:41,280 INFO L168 Benchmark]: Boogie Preprocessor took 25.20 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. [2019-11-15 22:06:41,280 INFO L168 Benchmark]: RCFGBuilder took 355.07 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: 23.2 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-15 22:06:41,281 INFO L168 Benchmark]: TraceAbstraction took 5332.80 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -21.1 MB). Peak memory consumption was 39.7 MB. Max. memory is 11.5 GB. [2019-11-15 22:06:41,281 INFO L168 Benchmark]: Witness Printer took 68.79 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: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 11.5 GB. [2019-11-15 22:06:41,284 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 360.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -198.4 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 38.06 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 25.20 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. * RCFGBuilder took 355.07 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: 23.2 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5332.80 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -21.1 MB). Peak memory consumption was 39.7 MB. Max. memory is 11.5 GB. * Witness Printer took 68.79 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: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: 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, 23 locations, 1 error locations. Result: SAFE, OverallTime: 5.2s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 206 SDtfs, 27 SDslu, 1249 SDs, 0 SdLazy, 350 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 271 GetRequests, 190 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred 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: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 30 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 5 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 332 NumberOfCodeBlocks, 304 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 320 ConstructedInterpolants, 0 QuantifiedInterpolants, 32728 SizeOfPredicates, 13 NumberOfNonLiveVariables, 238 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 110/150 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...