./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1d930099-38d1-4109-a29a-c24539538032/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_1d930099-38d1-4109-a29a-c24539538032/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1d930099-38d1-4109-a29a-c24539538032/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1d930099-38d1-4109-a29a-c24539538032/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -s /tmp/vcloud-vcloud-master/worker/run_dir_1d930099-38d1-4109-a29a-c24539538032/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1d930099-38d1-4109-a29a-c24539538032/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5f5357e64289d6bac41f74df7b40a85eebbaa806 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 11:05:12,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 11:05:12,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 11:05:12,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 11:05:12,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 11:05:12,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 11:05:12,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 11:05:12,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 11:05:12,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 11:05:12,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 11:05:12,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 11:05:12,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 11:05:12,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 11:05:12,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 11:05:12,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 11:05:12,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 11:05:12,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 11:05:12,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 11:05:12,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 11:05:12,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 11:05:12,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 11:05:12,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 11:05:12,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 11:05:12,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 11:05:12,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 11:05:12,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 11:05:12,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 11:05:12,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 11:05:12,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 11:05:12,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 11:05:12,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 11:05:12,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 11:05:12,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 11:05:12,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 11:05:12,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 11:05:12,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 11:05:12,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 11:05:12,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 11:05:12,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 11:05:12,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 11:05:12,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 11:05:12,572 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1d930099-38d1-4109-a29a-c24539538032/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 11:05:12,584 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 11:05:12,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 11:05:12,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 11:05:12,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 11:05:12,586 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 11:05:12,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 11:05:12,587 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 11:05:12,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 11:05:12,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 11:05:12,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 11:05:12,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 11:05:12,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 11:05:12,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 11:05:12,588 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 11:05:12,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 11:05:12,589 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 11:05:12,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 11:05:12,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 11:05:12,590 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 11:05:12,590 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 11:05:12,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 11:05:12,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 11:05:12,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 11:05:12,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 11:05:12,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 11:05:12,591 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 11:05:12,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 11:05:12,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 11:05:12,592 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1d930099-38d1-4109-a29a-c24539538032/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f5357e64289d6bac41f74df7b40a85eebbaa806 [2019-11-20 11:05:12,738 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 11:05:12,749 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 11:05:12,752 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 11:05:12,754 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 11:05:12,754 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 11:05:12,756 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1d930099-38d1-4109-a29a-c24539538032/bin/uautomizer/../../sv-benchmarks/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2019-11-20 11:05:12,806 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1d930099-38d1-4109-a29a-c24539538032/bin/uautomizer/data/51aa95aaf/bc858145efac476b937d08b825047bb3/FLAG8d34cafba [2019-11-20 11:05:13,204 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 11:05:13,204 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1d930099-38d1-4109-a29a-c24539538032/sv-benchmarks/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2019-11-20 11:05:13,210 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1d930099-38d1-4109-a29a-c24539538032/bin/uautomizer/data/51aa95aaf/bc858145efac476b937d08b825047bb3/FLAG8d34cafba [2019-11-20 11:05:13,222 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1d930099-38d1-4109-a29a-c24539538032/bin/uautomizer/data/51aa95aaf/bc858145efac476b937d08b825047bb3 [2019-11-20 11:05:13,224 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 11:05:13,225 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 11:05:13,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 11:05:13,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 11:05:13,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 11:05:13,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:05:13" (1/1) ... [2019-11-20 11:05:13,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d1d0946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:13, skipping insertion in model container [2019-11-20 11:05:13,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:05:13" (1/1) ... [2019-11-20 11:05:13,240 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 11:05:13,257 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 11:05:13,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:05:13,477 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 11:05:13,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:05:13,523 INFO L192 MainTranslator]: Completed translation [2019-11-20 11:05:13,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:13 WrapperNode [2019-11-20 11:05:13,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 11:05:13,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 11:05:13,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 11:05:13,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 11:05:13,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:13" (1/1) ... [2019-11-20 11:05:13,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:13" (1/1) ... [2019-11-20 11:05:13,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 11:05:13,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 11:05:13,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 11:05:13,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 11:05:13,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:13" (1/1) ... [2019-11-20 11:05:13,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:13" (1/1) ... [2019-11-20 11:05:13,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:13" (1/1) ... [2019-11-20 11:05:13,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:13" (1/1) ... [2019-11-20 11:05:13,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:13" (1/1) ... [2019-11-20 11:05:13,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:13" (1/1) ... [2019-11-20 11:05:13,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:13" (1/1) ... [2019-11-20 11:05:13,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 11:05:13,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 11:05:13,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 11:05:13,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 11:05:13,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d930099-38d1-4109-a29a-c24539538032/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 11:05:13,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 11:05:13,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-20 11:05:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-20 11:05:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2019-11-20 11:05:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 11:05:13,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 11:05:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 11:05:14,062 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 11:05:14,063 INFO L285 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-20 11:05:14,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:05:14 BoogieIcfgContainer [2019-11-20 11:05:14,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 11:05:14,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 11:05:14,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 11:05:14,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 11:05:14,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:05:13" (1/3) ... [2019-11-20 11:05:14,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66fd6e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:05:14, skipping insertion in model container [2019-11-20 11:05:14,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:05:13" (2/3) ... [2019-11-20 11:05:14,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66fd6e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:05:14, skipping insertion in model container [2019-11-20 11:05:14,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:05:14" (3/3) ... [2019-11-20 11:05:14,073 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2019-11-20 11:05:14,082 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 11:05:14,088 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 11:05:14,099 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 11:05:14,120 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 11:05:14,120 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 11:05:14,121 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 11:05:14,121 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 11:05:14,121 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 11:05:14,121 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 11:05:14,122 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 11:05:14,122 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 11:05:14,136 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-11-20 11:05:14,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 11:05:14,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:05:14,142 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:05:14,143 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:05:14,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:05:14,148 INFO L82 PathProgramCache]: Analyzing trace with hash -649032135, now seen corresponding path program 1 times [2019-11-20 11:05:14,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:05:14,157 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956647562] [2019-11-20 11:05:14,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:05:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:05:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:05:14,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956647562] [2019-11-20 11:05:14,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:05:14,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-20 11:05:14,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911628776] [2019-11-20 11:05:14,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 11:05:14,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:05:14,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 11:05:14,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 11:05:14,306 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2019-11-20 11:05:14,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:05:14,324 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2019-11-20 11:05:14,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 11:05:14,325 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-20 11:05:14,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:05:14,333 INFO L225 Difference]: With dead ends: 65 [2019-11-20 11:05:14,334 INFO L226 Difference]: Without dead ends: 29 [2019-11-20 11:05:14,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 11:05:14,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-20 11:05:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-20 11:05:14,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-20 11:05:14,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2019-11-20 11:05:14,368 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 17 [2019-11-20 11:05:14,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:05:14,368 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2019-11-20 11:05:14,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 11:05:14,369 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2019-11-20 11:05:14,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 11:05:14,370 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:05:14,370 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:05:14,370 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:05:14,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:05:14,371 INFO L82 PathProgramCache]: Analyzing trace with hash -829015504, now seen corresponding path program 1 times [2019-11-20 11:05:14,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:05:14,371 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745598325] [2019-11-20 11:05:14,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:05:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:05:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:05:14,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745598325] [2019-11-20 11:05:14,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:05:14,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 11:05:14,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606036281] [2019-11-20 11:05:14,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 11:05:14,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:05:14,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 11:05:14,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 11:05:14,425 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 3 states. [2019-11-20 11:05:14,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:05:14,450 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-11-20 11:05:14,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 11:05:14,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-20 11:05:14,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:05:14,455 INFO L225 Difference]: With dead ends: 56 [2019-11-20 11:05:14,455 INFO L226 Difference]: Without dead ends: 30 [2019-11-20 11:05:14,456 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 11:05:14,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-20 11:05:14,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-20 11:05:14,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-20 11:05:14,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2019-11-20 11:05:14,464 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 21 [2019-11-20 11:05:14,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:05:14,464 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2019-11-20 11:05:14,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 11:05:14,465 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2019-11-20 11:05:14,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 11:05:14,465 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:05:14,466 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:05:14,466 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:05:14,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:05:14,467 INFO L82 PathProgramCache]: Analyzing trace with hash -2108879182, now seen corresponding path program 1 times [2019-11-20 11:05:14,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:05:14,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186586251] [2019-11-20 11:05:14,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:05:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:05:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:05:14,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186586251] [2019-11-20 11:05:14,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:05:14,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 11:05:14,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986469046] [2019-11-20 11:05:14,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 11:05:14,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:05:14,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 11:05:14,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 11:05:14,616 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 5 states. [2019-11-20 11:05:14,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:05:14,706 INFO L93 Difference]: Finished difference Result 85 states and 113 transitions. [2019-11-20 11:05:14,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 11:05:14,708 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-11-20 11:05:14,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:05:14,709 INFO L225 Difference]: With dead ends: 85 [2019-11-20 11:05:14,709 INFO L226 Difference]: Without dead ends: 58 [2019-11-20 11:05:14,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 11:05:14,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-20 11:05:14,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 38. [2019-11-20 11:05:14,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-20 11:05:14,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2019-11-20 11:05:14,715 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 21 [2019-11-20 11:05:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:05:14,715 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2019-11-20 11:05:14,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 11:05:14,715 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2019-11-20 11:05:14,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 11:05:14,716 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:05:14,716 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:05:14,716 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:05:14,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:05:14,716 INFO L82 PathProgramCache]: Analyzing trace with hash -2049773838, now seen corresponding path program 1 times [2019-11-20 11:05:14,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:05:14,717 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300735355] [2019-11-20 11:05:14,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:05:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:05:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:05:14,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300735355] [2019-11-20 11:05:14,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:05:14,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-20 11:05:14,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646097148] [2019-11-20 11:05:14,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 11:05:14,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:05:14,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 11:05:14,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-20 11:05:14,873 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand 7 states. [2019-11-20 11:05:15,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:05:15,205 INFO L93 Difference]: Finished difference Result 167 states and 226 transitions. [2019-11-20 11:05:15,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 11:05:15,205 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-11-20 11:05:15,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:05:15,207 INFO L225 Difference]: With dead ends: 167 [2019-11-20 11:05:15,207 INFO L226 Difference]: Without dead ends: 107 [2019-11-20 11:05:15,208 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-20 11:05:15,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-20 11:05:15,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 45. [2019-11-20 11:05:15,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-20 11:05:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2019-11-20 11:05:15,215 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 21 [2019-11-20 11:05:15,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:05:15,215 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2019-11-20 11:05:15,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 11:05:15,217 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2019-11-20 11:05:15,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 11:05:15,219 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:05:15,219 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:05:15,219 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:05:15,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:05:15,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1791608400, now seen corresponding path program 1 times [2019-11-20 11:05:15,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:05:15,220 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135932964] [2019-11-20 11:05:15,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:05:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:05:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:05:15,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135932964] [2019-11-20 11:05:15,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:05:15,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-20 11:05:15,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096904549] [2019-11-20 11:05:15,340 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 11:05:15,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:05:15,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 11:05:15,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-20 11:05:15,341 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand 6 states. [2019-11-20 11:05:15,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:05:15,537 INFO L93 Difference]: Finished difference Result 139 states and 187 transitions. [2019-11-20 11:05:15,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 11:05:15,539 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-11-20 11:05:15,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:05:15,542 INFO L225 Difference]: With dead ends: 139 [2019-11-20 11:05:15,542 INFO L226 Difference]: Without dead ends: 81 [2019-11-20 11:05:15,543 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-20 11:05:15,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-20 11:05:15,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 40. [2019-11-20 11:05:15,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-20 11:05:15,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2019-11-20 11:05:15,555 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 21 [2019-11-20 11:05:15,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:05:15,556 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2019-11-20 11:05:15,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 11:05:15,556 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2019-11-20 11:05:15,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 11:05:15,557 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:05:15,557 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:05:15,557 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:05:15,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:05:15,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1282522692, now seen corresponding path program 1 times [2019-11-20 11:05:15,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:05:15,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858617840] [2019-11-20 11:05:15,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:05:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:05:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 11:05:15,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858617840] [2019-11-20 11:05:15,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:05:15,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-20 11:05:15,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180080349] [2019-11-20 11:05:15,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 11:05:15,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:05:15,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 11:05:15,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-20 11:05:15,656 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand 8 states. [2019-11-20 11:05:15,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:05:15,924 INFO L93 Difference]: Finished difference Result 142 states and 189 transitions. [2019-11-20 11:05:15,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 11:05:15,925 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-11-20 11:05:15,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:05:15,927 INFO L225 Difference]: With dead ends: 142 [2019-11-20 11:05:15,927 INFO L226 Difference]: Without dead ends: 98 [2019-11-20 11:05:15,928 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-11-20 11:05:15,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-20 11:05:15,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 62. [2019-11-20 11:05:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-20 11:05:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 83 transitions. [2019-11-20 11:05:15,946 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 83 transitions. Word has length 26 [2019-11-20 11:05:15,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:05:15,947 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 83 transitions. [2019-11-20 11:05:15,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 11:05:15,947 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2019-11-20 11:05:15,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 11:05:15,951 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:05:15,951 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:05:15,951 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:05:15,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:05:15,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1024357254, now seen corresponding path program 1 times [2019-11-20 11:05:15,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:05:15,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022879099] [2019-11-20 11:05:15,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:05:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:05:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 11:05:16,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022879099] [2019-11-20 11:05:16,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:05:16,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-20 11:05:16,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146564065] [2019-11-20 11:05:16,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 11:05:16,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:05:16,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 11:05:16,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-20 11:05:16,019 INFO L87 Difference]: Start difference. First operand 62 states and 83 transitions. Second operand 6 states. [2019-11-20 11:05:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:05:16,125 INFO L93 Difference]: Finished difference Result 101 states and 132 transitions. [2019-11-20 11:05:16,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 11:05:16,125 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-11-20 11:05:16,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:05:16,126 INFO L225 Difference]: With dead ends: 101 [2019-11-20 11:05:16,126 INFO L226 Difference]: Without dead ends: 99 [2019-11-20 11:05:16,127 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-20 11:05:16,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-20 11:05:16,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2019-11-20 11:05:16,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-20 11:05:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2019-11-20 11:05:16,136 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 26 [2019-11-20 11:05:16,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:05:16,136 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2019-11-20 11:05:16,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 11:05:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2019-11-20 11:05:16,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 11:05:16,138 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:05:16,138 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:05:16,138 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:05:16,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:05:16,138 INFO L82 PathProgramCache]: Analyzing trace with hash 2103980087, now seen corresponding path program 1 times [2019-11-20 11:05:16,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:05:16,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240384261] [2019-11-20 11:05:16,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:05:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:05:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 11:05:16,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240384261] [2019-11-20 11:05:16,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:05:16,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-20 11:05:16,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140861356] [2019-11-20 11:05:16,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 11:05:16,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:05:16,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 11:05:16,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 11:05:16,198 INFO L87 Difference]: Start difference. First operand 79 states and 106 transitions. Second operand 4 states. [2019-11-20 11:05:16,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:05:16,237 INFO L93 Difference]: Finished difference Result 130 states and 174 transitions. [2019-11-20 11:05:16,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 11:05:16,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-11-20 11:05:16,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:05:16,240 INFO L225 Difference]: With dead ends: 130 [2019-11-20 11:05:16,240 INFO L226 Difference]: Without dead ends: 89 [2019-11-20 11:05:16,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 11:05:16,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-20 11:05:16,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-11-20 11:05:16,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-20 11:05:16,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 116 transitions. [2019-11-20 11:05:16,248 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 116 transitions. Word has length 28 [2019-11-20 11:05:16,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:05:16,249 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 116 transitions. [2019-11-20 11:05:16,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 11:05:16,249 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 116 transitions. [2019-11-20 11:05:16,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 11:05:16,250 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:05:16,251 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:05:16,251 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:05:16,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:05:16,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1710953077, now seen corresponding path program 1 times [2019-11-20 11:05:16,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:05:16,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694008384] [2019-11-20 11:05:16,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:05:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:05:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:05:16,321 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694008384] [2019-11-20 11:05:16,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575914385] [2019-11-20 11:05:16,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d930099-38d1-4109-a29a-c24539538032/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:05:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:05:16,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 11:05:16,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:05:16,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:05:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:05:16,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:05:16,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-20 11:05:16,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913328867] [2019-11-20 11:05:16,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 11:05:16,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:05:16,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 11:05:16,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-20 11:05:16,433 INFO L87 Difference]: Start difference. First operand 89 states and 116 transitions. Second operand 8 states. [2019-11-20 11:05:16,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:05:16,574 INFO L93 Difference]: Finished difference Result 194 states and 250 transitions. [2019-11-20 11:05:16,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 11:05:16,574 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-11-20 11:05:16,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:05:16,575 INFO L225 Difference]: With dead ends: 194 [2019-11-20 11:05:16,575 INFO L226 Difference]: Without dead ends: 119 [2019-11-20 11:05:16,576 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-20 11:05:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-20 11:05:16,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 90. [2019-11-20 11:05:16,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-20 11:05:16,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2019-11-20 11:05:16,582 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 28 [2019-11-20 11:05:16,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:05:16,583 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2019-11-20 11:05:16,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 11:05:16,583 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2019-11-20 11:05:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-20 11:05:16,584 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:05:16,584 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:05:16,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:05:16,795 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:05:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:05:16,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2012014699, now seen corresponding path program 2 times [2019-11-20 11:05:16,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:05:16,796 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351978229] [2019-11-20 11:05:16,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:05:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:05:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:05:16,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351978229] [2019-11-20 11:05:16,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259596849] [2019-11-20 11:05:16,933 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d930099-38d1-4109-a29a-c24539538032/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:05:17,005 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 11:05:17,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:05:17,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 11:05:17,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:05:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:05:17,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:05:17,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2019-11-20 11:05:17,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194665334] [2019-11-20 11:05:17,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 11:05:17,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:05:17,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 11:05:17,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2019-11-20 11:05:17,163 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand 17 states. [2019-11-20 11:05:17,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:05:17,735 INFO L93 Difference]: Finished difference Result 218 states and 272 transitions. [2019-11-20 11:05:17,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 11:05:17,736 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2019-11-20 11:05:17,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:05:17,737 INFO L225 Difference]: With dead ends: 218 [2019-11-20 11:05:17,737 INFO L226 Difference]: Without dead ends: 171 [2019-11-20 11:05:17,738 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2019-11-20 11:05:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-11-20 11:05:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 114. [2019-11-20 11:05:17,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-20 11:05:17,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 144 transitions. [2019-11-20 11:05:17,752 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 144 transitions. Word has length 33 [2019-11-20 11:05:17,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:05:17,752 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 144 transitions. [2019-11-20 11:05:17,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 11:05:17,753 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 144 transitions. [2019-11-20 11:05:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-20 11:05:17,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:05:17,761 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:05:17,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:05:17,968 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:05:17,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:05:17,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1000897449, now seen corresponding path program 1 times [2019-11-20 11:05:17,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:05:17,968 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914945475] [2019-11-20 11:05:17,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:05:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:05:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:05:18,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914945475] [2019-11-20 11:05:18,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943872778] [2019-11-20 11:05:18,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1d930099-38d1-4109-a29a-c24539538032/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:05:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:05:18,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 11:05:18,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:05:18,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:05:18,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:05:18,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:05:18,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-20 11:05:18,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982014253] [2019-11-20 11:05:18,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 11:05:18,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:05:18,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 11:05:18,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-11-20 11:05:18,269 INFO L87 Difference]: Start difference. First operand 114 states and 144 transitions. Second operand 16 states. [2019-11-20 11:05:18,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:05:18,693 INFO L93 Difference]: Finished difference Result 220 states and 271 transitions. [2019-11-20 11:05:18,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 11:05:18,694 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2019-11-20 11:05:18,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:05:18,695 INFO L225 Difference]: With dead ends: 220 [2019-11-20 11:05:18,695 INFO L226 Difference]: Without dead ends: 218 [2019-11-20 11:05:18,696 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2019-11-20 11:05:18,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-11-20 11:05:18,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 133. [2019-11-20 11:05:18,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-11-20 11:05:18,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2019-11-20 11:05:18,705 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 33 [2019-11-20 11:05:18,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:05:18,705 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2019-11-20 11:05:18,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 11:05:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2019-11-20 11:05:18,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-20 11:05:18,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:05:18,706 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:05:18,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:05:18,907 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:05:18,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:05:18,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1002744491, now seen corresponding path program 1 times [2019-11-20 11:05:18,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:05:18,908 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670715296] [2019-11-20 11:05:18,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:05:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:05:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 11:05:18,967 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 11:05:18,967 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 11:05:19,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:05:19 BoogieIcfgContainer [2019-11-20 11:05:19,010 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 11:05:19,010 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 11:05:19,010 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 11:05:19,010 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 11:05:19,011 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:05:14" (3/4) ... [2019-11-20 11:05:19,013 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 11:05:19,069 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1d930099-38d1-4109-a29a-c24539538032/bin/uautomizer/witness.graphml [2019-11-20 11:05:19,069 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 11:05:19,071 INFO L168 Benchmark]: Toolchain (without parser) took 5845.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 184.5 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -228.4 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 11:05:19,072 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 11:05:19,072 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -193.3 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-11-20 11:05:19,073 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 11:05:19,073 INFO L168 Benchmark]: Boogie Preprocessor took 24.60 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 11:05:19,074 INFO L168 Benchmark]: RCFGBuilder took 452.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 11.5 GB. [2019-11-20 11:05:19,074 INFO L168 Benchmark]: TraceAbstraction took 4945.03 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 41.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -77.1 MB). Peak memory consumption was 232.4 MB. Max. memory is 11.5 GB. [2019-11-20 11:05:19,075 INFO L168 Benchmark]: Witness Printer took 59.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. [2019-11-20 11:05:19,077 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 297.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -193.3 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 62.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.60 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 452.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4945.03 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 41.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -77.1 MB). Peak memory consumption was 232.4 MB. Max. memory is 11.5 GB. * Witness Printer took 59.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L74] char A [2 + 2 + 4 +1]; [L75] A[2 + 2 + 4] = 0 [L48] int start=0, i=-1, j=-1; [L49] char str2[2]; [L50] COND FALSE !(!str) [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L56] EXPR str[start] [L56] COND FALSE !(str[start] == '"') [L57] j = i-1 [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L59] (0 < j) && (str[j] == '"') [L59] EXPR str[j] [L59] (0 < j) && (str[j] == '"') [L59] COND FALSE !((0 < j) && (str[j] == '"')) [L60] COND TRUE start<=j [L30] return strncpy(dest,src,n); [L3] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 34 locations, 1 error locations. Result: UNSAFE, OverallTime: 4.8s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 554 SDtfs, 1178 SDslu, 1594 SDs, 0 SdLazy, 1436 SolverSat, 182 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 198 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred 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: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 350 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 402 NumberOfCodeBlocks, 402 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 355 ConstructedInterpolants, 0 QuantifiedInterpolants, 41269 SizeOfPredicates, 10 NumberOfNonLiveVariables, 368 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 14 InterpolantComputations, 8 PerfectInterpolantSequences, 6/46 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...