./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_b3_o5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e8383605609727536c7199df6048e5c9703aa6e6 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:14:28,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:14:28,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:14:28,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:14:28,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:14:28,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:14:28,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:14:28,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:14:28,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:14:28,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:14:28,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:14:28,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:14:28,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:14:28,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:14:28,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:14:28,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:14:28,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:14:28,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:14:28,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:14:28,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:14:28,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:14:28,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:14:28,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:14:28,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:14:28,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:14:28,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:14:28,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:14:28,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:14:28,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:14:28,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:14:28,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:14:28,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:14:28,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:14:28,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:14:28,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:14:28,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:14:28,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:14:28,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:14:28,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:14:28,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:14:28,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:14:28,204 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:14:28,255 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:14:28,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:14:28,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:14:28,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:14:28,259 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:14:28,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:14:28,260 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:14:28,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:14:28,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:14:28,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:14:28,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:14:28,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:14:28,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:14:28,263 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:14:28,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:14:28,264 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:14:28,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:14:28,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:14:28,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:14:28,265 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:14:28,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:14:28,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:14:28,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:14:28,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:14:28,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:14:28,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:14:28,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:14:28,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:14:28,268 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:14:28,268 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8383605609727536c7199df6048e5c9703aa6e6 [2020-11-28 03:14:28,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:14:28,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:14:28,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:14:28,609 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:14:28,610 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:14:28,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id2_b3_o5.c [2020-11-28 03:14:28,694 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/data/3e20cc3bc/ce003235f07246f094775e01984405c3/FLAG20fe49254 [2020-11-28 03:14:29,336 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:14:29,336 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/sv-benchmarks/c/recursive-simple/id2_b3_o5.c [2020-11-28 03:14:29,349 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/data/3e20cc3bc/ce003235f07246f094775e01984405c3/FLAG20fe49254 [2020-11-28 03:14:29,709 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/data/3e20cc3bc/ce003235f07246f094775e01984405c3 [2020-11-28 03:14:29,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:14:29,714 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:14:29,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:14:29,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:14:29,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:14:29,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:14:29" (1/1) ... [2020-11-28 03:14:29,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@737ccde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:29, skipping insertion in model container [2020-11-28 03:14:29,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:14:29" (1/1) ... [2020-11-28 03:14:29,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:14:29,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:14:30,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:14:30,023 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:14:30,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:14:30,059 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:14:30,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:30 WrapperNode [2020-11-28 03:14:30,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:14:30,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:14:30,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:14:30,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:14:30,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:30" (1/1) ... [2020-11-28 03:14:30,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:30" (1/1) ... [2020-11-28 03:14:30,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:14:30,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:14:30,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:14:30,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:14:30,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:30" (1/1) ... [2020-11-28 03:14:30,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:30" (1/1) ... [2020-11-28 03:14:30,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:30" (1/1) ... [2020-11-28 03:14:30,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:30" (1/1) ... [2020-11-28 03:14:30,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:30" (1/1) ... [2020-11-28 03:14:30,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:30" (1/1) ... [2020-11-28 03:14:30,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:30" (1/1) ... [2020-11-28 03:14:30,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:14:30,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:14:30,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:14:30,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:14:30,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:14:30,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:14:30,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:14:30,209 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-11-28 03:14:30,210 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-11-28 03:14:30,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:14:30,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:14:30,210 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-28 03:14:30,211 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-28 03:14:30,591 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:14:30,592 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 03:14:30,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:14:30 BoogieIcfgContainer [2020-11-28 03:14:30,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:14:30,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:14:30,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:14:30,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:14:30,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:14:29" (1/3) ... [2020-11-28 03:14:30,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a2e06d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:14:30, skipping insertion in model container [2020-11-28 03:14:30,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:14:30" (2/3) ... [2020-11-28 03:14:30,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a2e06d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:14:30, skipping insertion in model container [2020-11-28 03:14:30,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:14:30" (3/3) ... [2020-11-28 03:14:30,604 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b3_o5.c [2020-11-28 03:14:30,616 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:14:30,620 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:14:30,633 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:14:30,674 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:14:30,675 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:14:30,675 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:14:30,675 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:14:30,675 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:14:30,675 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:14:30,676 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:14:30,676 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:14:30,693 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-28 03:14:30,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:14:30,699 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:30,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:30,700 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:30,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:30,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1818828162, now seen corresponding path program 1 times [2020-11-28 03:14:30,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:30,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603303146] [2020-11-28 03:14:30,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:31,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:14:31,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603303146] [2020-11-28 03:14:31,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:14:31,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:14:31,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526933971] [2020-11-28 03:14:31,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:14:31,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:31,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:14:31,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:14:31,136 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-11-28 03:14:31,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:31,214 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-11-28 03:14:31,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:14:31,219 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-28 03:14:31,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:31,229 INFO L225 Difference]: With dead ends: 37 [2020-11-28 03:14:31,229 INFO L226 Difference]: Without dead ends: 23 [2020-11-28 03:14:31,232 INFO L677 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 [2020-11-28 03:14:31,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-28 03:14:31,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-28 03:14:31,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 03:14:31,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-28 03:14:31,273 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2020-11-28 03:14:31,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:31,274 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-28 03:14:31,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:14:31,274 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-28 03:14:31,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 03:14:31,276 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:31,276 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:31,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:14:31,277 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:31,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:31,278 INFO L82 PathProgramCache]: Analyzing trace with hash -554629661, now seen corresponding path program 1 times [2020-11-28 03:14:31,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:31,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831144912] [2020-11-28 03:14:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:31,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:31,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:14:31,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831144912] [2020-11-28 03:14:31,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:14:31,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:14:31,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905131056] [2020-11-28 03:14:31,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:14:31,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:31,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:14:31,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:14:31,521 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-11-28 03:14:31,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:31,565 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-11-28 03:14:31,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:14:31,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-28 03:14:31,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:31,569 INFO L225 Difference]: With dead ends: 41 [2020-11-28 03:14:31,570 INFO L226 Difference]: Without dead ends: 29 [2020-11-28 03:14:31,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:14:31,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-28 03:14:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-11-28 03:14:31,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 03:14:31,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-11-28 03:14:31,580 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2020-11-28 03:14:31,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:31,581 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-11-28 03:14:31,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:14:31,581 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-11-28 03:14:31,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 03:14:31,586 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:31,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:31,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:14:31,588 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:31,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:31,589 INFO L82 PathProgramCache]: Analyzing trace with hash -526000510, now seen corresponding path program 1 times [2020-11-28 03:14:31,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:31,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613710850] [2020-11-28 03:14:31,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:31,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:31,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:14:31,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613710850] [2020-11-28 03:14:31,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:14:31,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-28 03:14:31,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586580108] [2020-11-28 03:14:31,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:14:31,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:31,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:14:31,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:14:31,889 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 8 states. [2020-11-28 03:14:31,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:31,966 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-11-28 03:14:31,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:14:31,968 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-11-28 03:14:31,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:31,969 INFO L225 Difference]: With dead ends: 33 [2020-11-28 03:14:31,970 INFO L226 Difference]: Without dead ends: 29 [2020-11-28 03:14:31,971 INFO L677 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 [2020-11-28 03:14:31,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-28 03:14:31,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-11-28 03:14:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 03:14:31,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-11-28 03:14:31,979 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2020-11-28 03:14:31,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:31,979 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-11-28 03:14:31,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:14:31,979 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-11-28 03:14:31,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 03:14:31,985 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:31,986 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:31,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:14:31,986 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:31,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:31,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1446075610, now seen corresponding path program 1 times [2020-11-28 03:14:31,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:31,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138139826] [2020-11-28 03:14:31,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:32,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:32,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:32,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:14:32,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138139826] [2020-11-28 03:14:32,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:14:32,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:14:32,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220808551] [2020-11-28 03:14:32,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:14:32,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:32,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:14:32,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:14:32,185 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-11-28 03:14:32,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:32,230 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-11-28 03:14:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:14:32,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-11-28 03:14:32,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:32,232 INFO L225 Difference]: With dead ends: 45 [2020-11-28 03:14:32,232 INFO L226 Difference]: Without dead ends: 33 [2020-11-28 03:14:32,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:14:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-28 03:14:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-11-28 03:14:32,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-28 03:14:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-11-28 03:14:32,240 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2020-11-28 03:14:32,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:32,241 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-11-28 03:14:32,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:14:32,241 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-11-28 03:14:32,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 03:14:32,242 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:32,245 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:32,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:14:32,245 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:32,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:32,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1249562105, now seen corresponding path program 1 times [2020-11-28 03:14:32,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:32,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455552266] [2020-11-28 03:14:32,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:32,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:32,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:32,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:14:32,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455552266] [2020-11-28 03:14:32,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:14:32,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-28 03:14:32,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835055779] [2020-11-28 03:14:32,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:14:32,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:32,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:14:32,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:14:32,549 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-11-28 03:14:32,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:32,613 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-11-28 03:14:32,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:14:32,614 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-11-28 03:14:32,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:32,616 INFO L225 Difference]: With dead ends: 49 [2020-11-28 03:14:32,616 INFO L226 Difference]: Without dead ends: 37 [2020-11-28 03:14:32,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:14:32,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-28 03:14:32,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-11-28 03:14:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-28 03:14:32,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-11-28 03:14:32,626 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 24 [2020-11-28 03:14:32,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:32,626 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-11-28 03:14:32,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:14:32,627 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-11-28 03:14:32,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 03:14:32,628 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:32,628 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:32,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 03:14:32,629 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:32,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:32,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1278191256, now seen corresponding path program 1 times [2020-11-28 03:14:32,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:32,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57001910] [2020-11-28 03:14:32,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:32,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:32,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:32,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:14:32,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57001910] [2020-11-28 03:14:32,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566803441] [2020-11-28 03:14:32,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:14:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:32,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-28 03:14:32,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:14:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:14:33,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:14:33,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-28 03:14:33,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876349350] [2020-11-28 03:14:33,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:14:33,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:33,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:14:33,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:14:33,108 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 12 states. [2020-11-28 03:14:33,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:33,234 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-11-28 03:14:33,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:14:33,235 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-11-28 03:14:33,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:33,236 INFO L225 Difference]: With dead ends: 41 [2020-11-28 03:14:33,236 INFO L226 Difference]: Without dead ends: 37 [2020-11-28 03:14:33,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:14:33,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-28 03:14:33,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-11-28 03:14:33,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-28 03:14:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-11-28 03:14:33,244 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2020-11-28 03:14:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:33,244 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-11-28 03:14:33,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:14:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-11-28 03:14:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 03:14:33,246 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:33,246 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:33,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-28 03:14:33,479 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:33,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:33,480 INFO L82 PathProgramCache]: Analyzing trace with hash -798172718, now seen corresponding path program 1 times [2020-11-28 03:14:33,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:33,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613092391] [2020-11-28 03:14:33,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:33,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:33,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:33,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:33,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 03:14:33,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613092391] [2020-11-28 03:14:33,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:14:33,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-28 03:14:33,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020440506] [2020-11-28 03:14:33,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:14:33,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:33,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:14:33,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:14:33,669 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-11-28 03:14:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:33,744 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-11-28 03:14:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:14:33,747 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-11-28 03:14:33,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:33,748 INFO L225 Difference]: With dead ends: 53 [2020-11-28 03:14:33,748 INFO L226 Difference]: Without dead ends: 41 [2020-11-28 03:14:33,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:14:33,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-28 03:14:33,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-11-28 03:14:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-28 03:14:33,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-11-28 03:14:33,756 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 31 [2020-11-28 03:14:33,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:33,757 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-11-28 03:14:33,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:14:33,757 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-11-28 03:14:33,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 03:14:33,758 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:33,759 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:33,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 03:14:33,759 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:33,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:33,760 INFO L82 PathProgramCache]: Analyzing trace with hash -994686223, now seen corresponding path program 1 times [2020-11-28 03:14:33,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:33,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271522169] [2020-11-28 03:14:33,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:33,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:33,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:33,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:34,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 03:14:34,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271522169] [2020-11-28 03:14:34,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196853857] [2020-11-28 03:14:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:14:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:34,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:14:34,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:14:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-28 03:14:34,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:14:34,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2020-11-28 03:14:34,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408702524] [2020-11-28 03:14:34,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:14:34,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:34,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:14:34,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:14:34,218 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 5 states. [2020-11-28 03:14:34,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:34,240 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-11-28 03:14:34,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:14:34,243 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-11-28 03:14:34,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:34,244 INFO L225 Difference]: With dead ends: 45 [2020-11-28 03:14:34,244 INFO L226 Difference]: Without dead ends: 41 [2020-11-28 03:14:34,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:14:34,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-28 03:14:34,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-11-28 03:14:34,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-28 03:14:34,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-11-28 03:14:34,254 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 31 [2020-11-28 03:14:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:34,256 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-11-28 03:14:34,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:14:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-11-28 03:14:34,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 03:14:34,267 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:34,268 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:34,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:14:34,483 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:34,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:34,483 INFO L82 PathProgramCache]: Analyzing trace with hash -966057072, now seen corresponding path program 1 times [2020-11-28 03:14:34,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:34,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102767462] [2020-11-28 03:14:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:34,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:34,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:34,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:34,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 03:14:34,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102767462] [2020-11-28 03:14:34,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247114482] [2020-11-28 03:14:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:14:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:34,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-28 03:14:34,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:14:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 03:14:35,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:14:35,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-28 03:14:35,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253752300] [2020-11-28 03:14:35,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-28 03:14:35,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:35,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-28 03:14:35,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:14:35,057 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 15 states. [2020-11-28 03:14:35,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:35,301 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-11-28 03:14:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-28 03:14:35,302 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-11-28 03:14:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:35,303 INFO L225 Difference]: With dead ends: 63 [2020-11-28 03:14:35,303 INFO L226 Difference]: Without dead ends: 47 [2020-11-28 03:14:35,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:14:35,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-28 03:14:35,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2020-11-28 03:14:35,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-28 03:14:35,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-11-28 03:14:35,311 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2020-11-28 03:14:35,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:35,311 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-11-28 03:14:35,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-28 03:14:35,312 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-11-28 03:14:35,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-28 03:14:35,313 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:35,313 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:35,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:14:35,535 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:35,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:35,535 INFO L82 PathProgramCache]: Analyzing trace with hash 637559183, now seen corresponding path program 1 times [2020-11-28 03:14:35,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:35,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831145138] [2020-11-28 03:14:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:35,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:35,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:35,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:35,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:35,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:35,880 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-28 03:14:35,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831145138] [2020-11-28 03:14:35,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474235570] [2020-11-28 03:14:35,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:14:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:35,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-28 03:14:35,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:14:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-28 03:14:36,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:14:36,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2020-11-28 03:14:36,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523660993] [2020-11-28 03:14:36,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:14:36,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:36,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:14:36,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:14:36,104 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 8 states. [2020-11-28 03:14:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:36,141 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-11-28 03:14:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:14:36,143 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-11-28 03:14:36,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:36,144 INFO L225 Difference]: With dead ends: 55 [2020-11-28 03:14:36,145 INFO L226 Difference]: Without dead ends: 41 [2020-11-28 03:14:36,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:14:36,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-28 03:14:36,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-11-28 03:14:36,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-28 03:14:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-11-28 03:14:36,151 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 38 [2020-11-28 03:14:36,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:36,151 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-11-28 03:14:36,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:14:36,151 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-11-28 03:14:36,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-28 03:14:36,152 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:36,153 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:36,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:14:36,353 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:36,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:36,354 INFO L82 PathProgramCache]: Analyzing trace with hash 441045678, now seen corresponding path program 2 times [2020-11-28 03:14:36,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:36,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497220944] [2020-11-28 03:14:36,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:36,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:36,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:36,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:36,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:36,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:36,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:36,760 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-28 03:14:36,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497220944] [2020-11-28 03:14:36,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140049416] [2020-11-28 03:14:36,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:14:36,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:14:36,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:14:36,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-28 03:14:36,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:14:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-28 03:14:37,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:14:37,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 18 [2020-11-28 03:14:37,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598282589] [2020-11-28 03:14:37,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-28 03:14:37,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:37,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-28 03:14:37,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:14:37,025 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 18 states. [2020-11-28 03:14:37,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:37,298 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2020-11-28 03:14:37,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-28 03:14:37,299 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-11-28 03:14:37,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:37,300 INFO L225 Difference]: With dead ends: 75 [2020-11-28 03:14:37,300 INFO L226 Difference]: Without dead ends: 57 [2020-11-28 03:14:37,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-11-28 03:14:37,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-28 03:14:37,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-11-28 03:14:37,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-28 03:14:37,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-11-28 03:14:37,306 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 38 [2020-11-28 03:14:37,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:37,306 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-11-28 03:14:37,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-28 03:14:37,306 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-11-28 03:14:37,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-28 03:14:37,307 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:14:37,308 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:14:37,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-28 03:14:37,528 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:14:37,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:14:37,528 INFO L82 PathProgramCache]: Analyzing trace with hash -120569442, now seen corresponding path program 2 times [2020-11-28 03:14:37,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:14:37,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244184561] [2020-11-28 03:14:37,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:14:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:37,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:37,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:37,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:37,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:37,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:37,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:37,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:14:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:14:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-28 03:14:37,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244184561] [2020-11-28 03:14:37,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746815371] [2020-11-28 03:14:37,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:14:38,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-28 03:14:38,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:14:38,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 03:14:38,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:14:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-11-28 03:14:38,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:14:38,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2020-11-28 03:14:38,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40605660] [2020-11-28 03:14:38,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:14:38,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:14:38,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:14:38,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:14:38,130 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 5 states. [2020-11-28 03:14:38,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:14:38,164 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-11-28 03:14:38,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:14:38,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-11-28 03:14:38,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:14:38,165 INFO L225 Difference]: With dead ends: 51 [2020-11-28 03:14:38,165 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:14:38,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:14:38,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:14:38,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:14:38,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:14:38,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:14:38,167 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2020-11-28 03:14:38,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:14:38,168 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:14:38,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:14:38,168 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:14:38,168 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:14:38,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:14:38,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 03:14:38,387 INFO L274 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-11-28 03:14:38,387 INFO L274 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-11-28 03:14:38,387 INFO L274 CegarLoopResult]: For program point id2EXIT(lines 16 21) no Hoare annotation was computed. [2020-11-28 03:14:38,387 INFO L277 CegarLoopResult]: At program point id2ENTRY(lines 16 21) the Hoare annotation is: true [2020-11-28 03:14:38,387 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-11-28 03:14:38,387 INFO L274 CegarLoopResult]: For program point id2FINAL(lines 16 21) no Hoare annotation was computed. [2020-11-28 03:14:38,388 INFO L277 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: true [2020-11-28 03:14:38,388 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 03:14:38,388 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-28 03:14:38,388 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 03:14:38,388 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-28 03:14:38,388 INFO L274 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-11-28 03:14:38,388 INFO L274 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-11-28 03:14:38,388 INFO L277 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: true [2020-11-28 03:14:38,388 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-11-28 03:14:38,389 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-28 03:14:38,389 INFO L274 CegarLoopResult]: For program point L23(lines 23 29) no Hoare annotation was computed. [2020-11-28 03:14:38,389 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-11-28 03:14:38,389 INFO L274 CegarLoopResult]: For program point idFINAL(lines 9 14) no Hoare annotation was computed. [2020-11-28 03:14:38,389 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-28 03:14:38,390 INFO L277 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: true [2020-11-28 03:14:38,390 INFO L274 CegarLoopResult]: For program point idEXIT(lines 9 14) no Hoare annotation was computed. [2020-11-28 03:14:38,390 INFO L274 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-11-28 03:14:38,390 INFO L274 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-11-28 03:14:38,390 INFO L277 CegarLoopResult]: At program point idENTRY(lines 9 14) the Hoare annotation is: true [2020-11-28 03:14:38,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:14:38 BoogieIcfgContainer [2020-11-28 03:14:38,396 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:14:38,397 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:14:38,397 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:14:38,398 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:14:38,398 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:14:30" (3/4) ... [2020-11-28 03:14:38,402 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:14:38,409 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2020-11-28 03:14:38,410 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2020-11-28 03:14:38,415 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-28 03:14:38,416 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-28 03:14:38,416 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:14:38,416 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:14:38,459 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a0c598d8-28e3-4fd1-8455-63580ea6edd5/bin/uautomizer/witness.graphml [2020-11-28 03:14:38,459 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:14:38,461 INFO L168 Benchmark]: Toolchain (without parser) took 8746.29 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 59.8 MB in the beginning and 43.8 MB in the end (delta: 15.9 MB). Peak memory consumption was 56.9 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:38,462 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 90.2 MB. Free memory was 50.1 MB in the beginning and 50.0 MB in the end (delta: 39.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:14:38,462 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.41 ms. Allocated memory is still 90.2 MB. Free memory was 59.6 MB in the beginning and 67.7 MB in the end (delta: -8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:38,463 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.78 ms. Allocated memory is still 90.2 MB. Free memory was 67.7 MB in the beginning and 66.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:14:38,463 INFO L168 Benchmark]: Boogie Preprocessor took 22.01 ms. Allocated memory is still 90.2 MB. Free memory was 66.4 MB in the beginning and 65.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:38,464 INFO L168 Benchmark]: RCFGBuilder took 474.11 ms. Allocated memory is still 90.2 MB. Free memory was 65.3 MB in the beginning and 53.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:38,465 INFO L168 Benchmark]: TraceAbstraction took 7800.84 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 52.8 MB in the beginning and 47.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 49.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:38,465 INFO L168 Benchmark]: Witness Printer took 62.07 ms. Allocated memory is still 132.1 MB. Free memory was 47.0 MB in the beginning and 43.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:14:38,468 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 90.2 MB. Free memory was 50.1 MB in the beginning and 50.0 MB in the end (delta: 39.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 333.41 ms. Allocated memory is still 90.2 MB. Free memory was 59.6 MB in the beginning and 67.7 MB in the end (delta: -8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.78 ms. Allocated memory is still 90.2 MB. Free memory was 67.7 MB in the beginning and 66.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.01 ms. Allocated memory is still 90.2 MB. Free memory was 66.4 MB in the beginning and 65.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 474.11 ms. Allocated memory is still 90.2 MB. Free memory was 65.3 MB in the beginning and 53.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7800.84 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 52.8 MB in the beginning and 47.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 49.5 MB. Max. memory is 16.1 GB. * Witness Printer took 62.07 ms. Allocated memory is still 132.1 MB. Free memory was 47.0 MB in the beginning and 43.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.6s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 318 SDtfs, 37 SDslu, 1951 SDs, 0 SdLazy, 504 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 422 GetRequests, 300 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=11, 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, 12 MinimizatonAttempts, 38 StatesRemovedByMinimization, 10 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: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 537 NumberOfCodeBlocks, 509 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 519 ConstructedInterpolants, 0 QuantifiedInterpolants, 49671 SizeOfPredicates, 17 NumberOfNonLiveVariables, 561 ConjunctsInSsa, 104 ConjunctsInUnsatCore, 18 InterpolantComputations, 9 PerfectInterpolantSequences, 179/231 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...