./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label49.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label49.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c7e59aea7a3c4214c2070bc3dc105ace2c6879c8 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 12:14:12,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 12:14:12,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 12:14:12,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 12:14:12,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 12:14:12,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 12:14:12,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 12:14:12,540 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 12:14:12,542 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 12:14:12,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 12:14:12,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 12:14:12,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 12:14:12,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 12:14:12,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 12:14:12,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 12:14:12,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 12:14:12,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 12:14:12,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 12:14:12,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 12:14:12,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 12:14:12,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 12:14:12,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 12:14:12,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 12:14:12,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 12:14:12,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 12:14:12,561 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 12:14:12,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 12:14:12,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 12:14:12,563 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 12:14:12,564 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 12:14:12,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 12:14:12,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 12:14:12,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 12:14:12,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 12:14:12,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 12:14:12,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 12:14:12,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 12:14:12,568 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 12:14:12,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 12:14:12,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 12:14:12,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 12:14:12,570 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 12:14:12,592 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 12:14:12,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 12:14:12,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 12:14:12,593 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 12:14:12,593 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 12:14:12,593 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 12:14:12,593 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 12:14:12,593 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 12:14:12,593 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 12:14:12,593 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 12:14:12,593 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 12:14:12,594 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 12:14:12,594 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 12:14:12,594 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 12:14:12,594 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 12:14:12,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 12:14:12,595 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 12:14:12,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 12:14:12,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 12:14:12,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 12:14:12,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 12:14:12,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 12:14:12,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 12:14:12,596 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 12:14:12,596 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 12:14:12,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 12:14:12,596 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 12:14:12,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 12:14:12,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 12:14:12,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 12:14:12,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:14:12,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 12:14:12,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 12:14:12,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 12:14:12,597 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 12:14:12,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 12:14:12,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 12:14:12,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 12:14:12,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 12:14:12,597 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_f7ffed96-894f-4d72-be64-01ae211884d6/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e59aea7a3c4214c2070bc3dc105ace2c6879c8 [2020-12-09 12:14:12,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 12:14:12,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 12:14:12,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 12:14:12,785 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 12:14:12,785 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 12:14:12,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label49.c [2020-12-09 12:14:12,829 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/bin/utaipan/data/ee03e765c/8f9cfd01d2674ea9b83ce647d04f23b2/FLAG2159ed38a [2020-12-09 12:14:13,235 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 12:14:13,235 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/sv-benchmarks/c/eca-rers2012/Problem01_label49.c [2020-12-09 12:14:13,244 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/bin/utaipan/data/ee03e765c/8f9cfd01d2674ea9b83ce647d04f23b2/FLAG2159ed38a [2020-12-09 12:14:13,629 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/bin/utaipan/data/ee03e765c/8f9cfd01d2674ea9b83ce647d04f23b2 [2020-12-09 12:14:13,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 12:14:13,639 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 12:14:13,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 12:14:13,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 12:14:13,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 12:14:13,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:14:13" (1/1) ... [2020-12-09 12:14:13,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774392ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:14:13, skipping insertion in model container [2020-12-09 12:14:13,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:14:13" (1/1) ... [2020-12-09 12:14:13,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 12:14:13,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 12:14:13,900 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/sv-benchmarks/c/eca-rers2012/Problem01_label49.c[18854,18867] [2020-12-09 12:14:13,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:14:13,927 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 12:14:13,989 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/sv-benchmarks/c/eca-rers2012/Problem01_label49.c[18854,18867] [2020-12-09 12:14:13,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:14:14,008 INFO L208 MainTranslator]: Completed translation [2020-12-09 12:14:14,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:14:14 WrapperNode [2020-12-09 12:14:14,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 12:14:14,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 12:14:14,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 12:14:14,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 12:14:14,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:14:14" (1/1) ... [2020-12-09 12:14:14,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:14:14" (1/1) ... [2020-12-09 12:14:14,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 12:14:14,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 12:14:14,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 12:14:14,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 12:14:14,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:14:14" (1/1) ... [2020-12-09 12:14:14,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:14:14" (1/1) ... [2020-12-09 12:14:14,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:14:14" (1/1) ... [2020-12-09 12:14:14,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:14:14" (1/1) ... [2020-12-09 12:14:14,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:14:14" (1/1) ... [2020-12-09 12:14:14,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:14:14" (1/1) ... [2020-12-09 12:14:14,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:14:14" (1/1) ... [2020-12-09 12:14:14,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 12:14:14,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 12:14:14,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 12:14:14,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 12:14:14,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:14:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/bin/utaipan/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 [2020-12-09 12:14:14,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 12:14:14,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 12:14:14,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 12:14:14,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 12:14:15,414 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 12:14:15,414 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 12:14:15,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:14:15 BoogieIcfgContainer [2020-12-09 12:14:15,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 12:14:15,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 12:14:15,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 12:14:15,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 12:14:15,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:14:13" (1/3) ... [2020-12-09 12:14:15,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5071121d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:14:15, skipping insertion in model container [2020-12-09 12:14:15,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:14:14" (2/3) ... [2020-12-09 12:14:15,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5071121d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:14:15, skipping insertion in model container [2020-12-09 12:14:15,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:14:15" (3/3) ... [2020-12-09 12:14:15,423 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label49.c [2020-12-09 12:14:15,433 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 12:14:15,436 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 12:14:15,443 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 12:14:15,461 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 12:14:15,461 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 12:14:15,461 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 12:14:15,461 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 12:14:15,462 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 12:14:15,462 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 12:14:15,462 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 12:14:15,462 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 12:14:15,478 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-12-09 12:14:15,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-09 12:14:15,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:14:15,485 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:14:15,485 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:14:15,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:14:15,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1806910296, now seen corresponding path program 1 times [2020-12-09 12:14:15,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:14:15,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762601093] [2020-12-09 12:14:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:14:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:14:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:14:15,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762601093] [2020-12-09 12:14:15,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:14:15,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 12:14:15,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94957000] [2020-12-09 12:14:15,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:14:15,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:14:15,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:14:15,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:14:15,747 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-12-09 12:14:16,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:14:16,076 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-12-09 12:14:16,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:14:16,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-09 12:14:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:14:16,086 INFO L225 Difference]: With dead ends: 224 [2020-12-09 12:14:16,086 INFO L226 Difference]: Without dead ends: 145 [2020-12-09 12:14:16,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:14:16,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-09 12:14:16,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-12-09 12:14:16,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-09 12:14:16,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 271 transitions. [2020-12-09 12:14:16,123 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 271 transitions. Word has length 71 [2020-12-09 12:14:16,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:14:16,124 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 271 transitions. [2020-12-09 12:14:16,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:14:16,124 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 271 transitions. [2020-12-09 12:14:16,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-09 12:14:16,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:14:16,126 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:14:16,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 12:14:16,127 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:14:16,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:14:16,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1694597950, now seen corresponding path program 1 times [2020-12-09 12:14:16,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:14:16,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647034572] [2020-12-09 12:14:16,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:14:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:14:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:14:16,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647034572] [2020-12-09 12:14:16,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:14:16,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 12:14:16,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986653099] [2020-12-09 12:14:16,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:14:16,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:14:16,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:14:16,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:14:16,174 INFO L87 Difference]: Start difference. First operand 145 states and 271 transitions. Second operand 3 states. [2020-12-09 12:14:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:14:16,419 INFO L93 Difference]: Finished difference Result 433 states and 811 transitions. [2020-12-09 12:14:16,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:14:16,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-09 12:14:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:14:16,422 INFO L225 Difference]: With dead ends: 433 [2020-12-09 12:14:16,422 INFO L226 Difference]: Without dead ends: 289 [2020-12-09 12:14:16,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:14:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-12-09 12:14:16,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2020-12-09 12:14:16,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-09 12:14:16,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 504 transitions. [2020-12-09 12:14:16,440 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 504 transitions. Word has length 76 [2020-12-09 12:14:16,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:14:16,440 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 504 transitions. [2020-12-09 12:14:16,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:14:16,441 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 504 transitions. [2020-12-09 12:14:16,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-09 12:14:16,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:14:16,443 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:14:16,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 12:14:16,443 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:14:16,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:14:16,444 INFO L82 PathProgramCache]: Analyzing trace with hash -143900851, now seen corresponding path program 1 times [2020-12-09 12:14:16,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:14:16,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488099920] [2020-12-09 12:14:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:14:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:14:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:14:16,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488099920] [2020-12-09 12:14:16,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:14:16,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 12:14:16,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938646090] [2020-12-09 12:14:16,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 12:14:16,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:14:16,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 12:14:16,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 12:14:16,500 INFO L87 Difference]: Start difference. First operand 287 states and 504 transitions. Second operand 4 states. [2020-12-09 12:14:16,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:14:16,908 INFO L93 Difference]: Finished difference Result 999 states and 1753 transitions. [2020-12-09 12:14:16,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 12:14:16,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-09 12:14:16,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:14:16,913 INFO L225 Difference]: With dead ends: 999 [2020-12-09 12:14:16,914 INFO L226 Difference]: Without dead ends: 713 [2020-12-09 12:14:16,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 12:14:16,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-12-09 12:14:16,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2020-12-09 12:14:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-12-09 12:14:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1106 transitions. [2020-12-09 12:14:16,947 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1106 transitions. Word has length 83 [2020-12-09 12:14:16,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:14:16,948 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1106 transitions. [2020-12-09 12:14:16,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 12:14:16,948 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1106 transitions. [2020-12-09 12:14:16,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-09 12:14:16,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:14:16,952 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:14:16,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 12:14:16,952 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:14:16,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:14:16,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1140303067, now seen corresponding path program 1 times [2020-12-09 12:14:16,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:14:16,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604409194] [2020-12-09 12:14:16,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:14:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:14:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:14:17,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604409194] [2020-12-09 12:14:17,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:14:17,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 12:14:17,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83955638] [2020-12-09 12:14:17,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:14:17,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:14:17,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:14:17,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:14:17,020 INFO L87 Difference]: Start difference. First operand 713 states and 1106 transitions. Second operand 3 states. [2020-12-09 12:14:17,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:14:17,236 INFO L93 Difference]: Finished difference Result 1780 states and 2693 transitions. [2020-12-09 12:14:17,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:14:17,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-12-09 12:14:17,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:14:17,243 INFO L225 Difference]: With dead ends: 1780 [2020-12-09 12:14:17,243 INFO L226 Difference]: Without dead ends: 1068 [2020-12-09 12:14:17,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:14:17,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2020-12-09 12:14:17,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 997. [2020-12-09 12:14:17,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-12-09 12:14:17,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1445 transitions. [2020-12-09 12:14:17,272 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1445 transitions. Word has length 86 [2020-12-09 12:14:17,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:14:17,272 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1445 transitions. [2020-12-09 12:14:17,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:14:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1445 transitions. [2020-12-09 12:14:17,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-09 12:14:17,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:14:17,274 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:14:17,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 12:14:17,275 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:14:17,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:14:17,275 INFO L82 PathProgramCache]: Analyzing trace with hash -886285033, now seen corresponding path program 1 times [2020-12-09 12:14:17,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:14:17,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203011470] [2020-12-09 12:14:17,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:14:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:14:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 12:14:17,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203011470] [2020-12-09 12:14:17,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:14:17,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 12:14:17,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594835052] [2020-12-09 12:14:17,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:14:17,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:14:17,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:14:17,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:14:17,318 INFO L87 Difference]: Start difference. First operand 997 states and 1445 transitions. Second operand 3 states. [2020-12-09 12:14:17,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:14:17,582 INFO L93 Difference]: Finished difference Result 2277 states and 3385 transitions. [2020-12-09 12:14:17,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:14:17,583 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-09 12:14:17,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:14:17,588 INFO L225 Difference]: With dead ends: 2277 [2020-12-09 12:14:17,588 INFO L226 Difference]: Without dead ends: 1281 [2020-12-09 12:14:17,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:14:17,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-12-09 12:14:17,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2020-12-09 12:14:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-12-09 12:14:17,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1613 transitions. [2020-12-09 12:14:17,616 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1613 transitions. Word has length 87 [2020-12-09 12:14:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:14:17,616 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1613 transitions. [2020-12-09 12:14:17,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:14:17,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1613 transitions. [2020-12-09 12:14:17,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-09 12:14:17,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:14:17,618 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, 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, 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] [2020-12-09 12:14:17,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 12:14:17,619 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:14:17,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:14:17,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1043319187, now seen corresponding path program 1 times [2020-12-09 12:14:17,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:14:17,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520666612] [2020-12-09 12:14:17,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:14:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:14:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:14:17,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520666612] [2020-12-09 12:14:17,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:14:17,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 12:14:17,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219589221] [2020-12-09 12:14:17,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 12:14:17,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:14:17,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 12:14:17,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 12:14:17,663 INFO L87 Difference]: Start difference. First operand 1281 states and 1613 transitions. Second operand 4 states. [2020-12-09 12:14:17,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:14:17,969 INFO L93 Difference]: Finished difference Result 2490 states and 3151 transitions. [2020-12-09 12:14:17,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 12:14:17,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-12-09 12:14:17,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:14:17,975 INFO L225 Difference]: With dead ends: 2490 [2020-12-09 12:14:17,975 INFO L226 Difference]: Without dead ends: 1281 [2020-12-09 12:14:17,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 12:14:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-12-09 12:14:17,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2020-12-09 12:14:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-12-09 12:14:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1560 transitions. [2020-12-09 12:14:18,000 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1560 transitions. Word has length 90 [2020-12-09 12:14:18,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:14:18,001 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1560 transitions. [2020-12-09 12:14:18,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 12:14:18,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1560 transitions. [2020-12-09 12:14:18,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-09 12:14:18,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:14:18,003 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:14:18,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 12:14:18,003 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:14:18,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:14:18,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1202873070, now seen corresponding path program 1 times [2020-12-09 12:14:18,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:14:18,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350439183] [2020-12-09 12:14:18,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:14:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:14:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:14:18,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350439183] [2020-12-09 12:14:18,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:14:18,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 12:14:18,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379929851] [2020-12-09 12:14:18,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:14:18,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:14:18,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:14:18,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:14:18,072 INFO L87 Difference]: Start difference. First operand 1281 states and 1560 transitions. Second operand 3 states. [2020-12-09 12:14:18,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:14:18,285 INFO L93 Difference]: Finished difference Result 2490 states and 3045 transitions. [2020-12-09 12:14:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:14:18,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-09 12:14:18,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:14:18,290 INFO L225 Difference]: With dead ends: 2490 [2020-12-09 12:14:18,290 INFO L226 Difference]: Without dead ends: 1281 [2020-12-09 12:14:18,292 INFO L677 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 [2020-12-09 12:14:18,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-12-09 12:14:18,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 997. [2020-12-09 12:14:18,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-12-09 12:14:18,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1159 transitions. [2020-12-09 12:14:18,318 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1159 transitions. Word has length 108 [2020-12-09 12:14:18,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:14:18,319 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1159 transitions. [2020-12-09 12:14:18,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:14:18,319 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1159 transitions. [2020-12-09 12:14:18,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-09 12:14:18,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:14:18,321 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2020-12-09 12:14:18,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 12:14:18,321 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:14:18,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:14:18,321 INFO L82 PathProgramCache]: Analyzing trace with hash 729569231, now seen corresponding path program 1 times [2020-12-09 12:14:18,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:14:18,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835567867] [2020-12-09 12:14:18,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:14:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:14:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:14:18,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835567867] [2020-12-09 12:14:18,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:14:18,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 12:14:18,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422489959] [2020-12-09 12:14:18,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:14:18,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:14:18,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:14:18,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:14:18,393 INFO L87 Difference]: Start difference. First operand 997 states and 1159 transitions. Second operand 3 states. [2020-12-09 12:14:18,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:14:18,596 INFO L93 Difference]: Finished difference Result 2206 states and 2586 transitions. [2020-12-09 12:14:18,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:14:18,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 155 [2020-12-09 12:14:18,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:14:18,601 INFO L225 Difference]: With dead ends: 2206 [2020-12-09 12:14:18,602 INFO L226 Difference]: Without dead ends: 1281 [2020-12-09 12:14:18,603 INFO L677 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 [2020-12-09 12:14:18,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-12-09 12:14:18,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1210. [2020-12-09 12:14:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-12-09 12:14:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1386 transitions. [2020-12-09 12:14:18,633 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1386 transitions. Word has length 155 [2020-12-09 12:14:18,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:14:18,634 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1386 transitions. [2020-12-09 12:14:18,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:14:18,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1386 transitions. [2020-12-09 12:14:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-09 12:14:18,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:14:18,636 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:14:18,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 12:14:18,637 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:14:18,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:14:18,637 INFO L82 PathProgramCache]: Analyzing trace with hash 160106505, now seen corresponding path program 1 times [2020-12-09 12:14:18,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:14:18,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930378562] [2020-12-09 12:14:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:14:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:14:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-09 12:14:18,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930378562] [2020-12-09 12:14:18,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:14:18,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 12:14:18,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092400080] [2020-12-09 12:14:18,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:14:18,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:14:18,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:14:18,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:14:18,705 INFO L87 Difference]: Start difference. First operand 1210 states and 1386 transitions. Second operand 3 states. [2020-12-09 12:14:18,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:14:18,893 INFO L93 Difference]: Finished difference Result 2632 states and 3040 transitions. [2020-12-09 12:14:18,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:14:18,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 158 [2020-12-09 12:14:18,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:14:18,899 INFO L225 Difference]: With dead ends: 2632 [2020-12-09 12:14:18,899 INFO L226 Difference]: Without dead ends: 1494 [2020-12-09 12:14:18,900 INFO L677 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 [2020-12-09 12:14:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2020-12-09 12:14:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1281. [2020-12-09 12:14:18,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-12-09 12:14:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1455 transitions. [2020-12-09 12:14:18,919 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1455 transitions. Word has length 158 [2020-12-09 12:14:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:14:18,919 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1455 transitions. [2020-12-09 12:14:18,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:14:18,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1455 transitions. [2020-12-09 12:14:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-09 12:14:18,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:14:18,922 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2020-12-09 12:14:18,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 12:14:18,922 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:14:18,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:14:18,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1322169266, now seen corresponding path program 1 times [2020-12-09 12:14:18,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:14:18,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717003515] [2020-12-09 12:14:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:14:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:14:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 113 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:14:19,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717003515] [2020-12-09 12:14:19,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221633899] [2020-12-09 12:14:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/bin/utaipan/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 [2020-12-09 12:14:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:14:19,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 12:14:19,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:14:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-12-09 12:14:19,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:14:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-12-09 12:14:19,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 12:14:19,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5] total 6 [2020-12-09 12:14:19,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889319422] [2020-12-09 12:14:19,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:14:19,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:14:19,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:14:19,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 12:14:19,416 INFO L87 Difference]: Start difference. First operand 1281 states and 1455 transitions. Second operand 3 states. [2020-12-09 12:14:19,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:14:19,602 INFO L93 Difference]: Finished difference Result 2916 states and 3349 transitions. [2020-12-09 12:14:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:14:19,602 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 168 [2020-12-09 12:14:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:14:19,610 INFO L225 Difference]: With dead ends: 2916 [2020-12-09 12:14:19,611 INFO L226 Difference]: Without dead ends: 1707 [2020-12-09 12:14:19,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 333 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 12:14:19,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-12-09 12:14:19,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 997. [2020-12-09 12:14:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-12-09 12:14:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1149 transitions. [2020-12-09 12:14:19,634 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1149 transitions. Word has length 168 [2020-12-09 12:14:19,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:14:19,634 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1149 transitions. [2020-12-09 12:14:19,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:14:19,634 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1149 transitions. [2020-12-09 12:14:19,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-09 12:14:19,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:14:19,637 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:14:19,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-09 12:14:19,838 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:14:19,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:14:19,838 INFO L82 PathProgramCache]: Analyzing trace with hash -512694687, now seen corresponding path program 1 times [2020-12-09 12:14:19,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:14:19,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088428406] [2020-12-09 12:14:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:14:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:14:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 255 proven. 35 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-09 12:14:20,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088428406] [2020-12-09 12:14:20,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774534748] [2020-12-09 12:14:20,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/bin/utaipan/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 [2020-12-09 12:14:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:14:20,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 12:14:20,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:14:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2020-12-09 12:14:20,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:14:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2020-12-09 12:14:20,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 12:14:20,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-12-09 12:14:20,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670477308] [2020-12-09 12:14:20,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:14:20,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:14:20,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:14:20,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 12:14:20,544 INFO L87 Difference]: Start difference. First operand 997 states and 1149 transitions. Second operand 3 states. [2020-12-09 12:14:20,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:14:20,748 INFO L93 Difference]: Finished difference Result 2277 states and 2650 transitions. [2020-12-09 12:14:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:14:20,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 256 [2020-12-09 12:14:20,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:14:20,755 INFO L225 Difference]: With dead ends: 2277 [2020-12-09 12:14:20,755 INFO L226 Difference]: Without dead ends: 1352 [2020-12-09 12:14:20,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 509 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-09 12:14:20,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-12-09 12:14:20,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1210. [2020-12-09 12:14:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-12-09 12:14:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1410 transitions. [2020-12-09 12:14:20,784 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1410 transitions. Word has length 256 [2020-12-09 12:14:20,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:14:20,785 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1410 transitions. [2020-12-09 12:14:20,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:14:20,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1410 transitions. [2020-12-09 12:14:20,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-12-09 12:14:20,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:14:20,790 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:14:20,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 12:14:20,992 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:14:20,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:14:20,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1878542599, now seen corresponding path program 1 times [2020-12-09 12:14:20,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:14:20,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101076244] [2020-12-09 12:14:20,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:14:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:14:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 270 proven. 114 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-09 12:14:21,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101076244] [2020-12-09 12:14:21,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291639334] [2020-12-09 12:14:21,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/bin/utaipan/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 [2020-12-09 12:14:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:14:21,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 12:14:21,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 12:14:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-12-09 12:14:21,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 12:14:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-12-09 12:14:21,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 12:14:21,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-12-09 12:14:21,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694252929] [2020-12-09 12:14:21,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:14:21,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:14:21,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:14:21,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 12:14:21,737 INFO L87 Difference]: Start difference. First operand 1210 states and 1410 transitions. Second operand 3 states. [2020-12-09 12:14:21,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:14:21,925 INFO L93 Difference]: Finished difference Result 2559 states and 3006 transitions. [2020-12-09 12:14:21,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:14:21,926 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 265 [2020-12-09 12:14:21,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:14:21,926 INFO L225 Difference]: With dead ends: 2559 [2020-12-09 12:14:21,926 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 12:14:21,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 528 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 12:14:21,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 12:14:21,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 12:14:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 12:14:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 12:14:21,928 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 265 [2020-12-09 12:14:21,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:14:21,928 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 12:14:21,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:14:21,929 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 12:14:21,929 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 12:14:22,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-09 12:14:22,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 12:14:22,342 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-12-09 12:14:22,432 INFO L262 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-12-09 12:14:22,432 INFO L262 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-12-09 12:14:22,432 INFO L262 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-12-09 12:14:22,432 INFO L262 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-12-09 12:14:22,432 INFO L262 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-12-09 12:14:22,432 INFO L262 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-12-09 12:14:22,432 INFO L262 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-12-09 12:14:22,432 INFO L262 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-12-09 12:14:22,432 INFO L262 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-12-09 12:14:22,432 INFO L262 CegarLoopResult]: For program point L503-1(lines 40 585) no Hoare annotation was computed. [2020-12-09 12:14:22,433 INFO L262 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-12-09 12:14:22,433 INFO L262 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-12-09 12:14:22,433 INFO L262 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-12-09 12:14:22,433 INFO L262 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-12-09 12:14:22,433 INFO L262 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-12-09 12:14:22,433 INFO L262 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-12-09 12:14:22,433 INFO L262 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-12-09 12:14:22,433 INFO L262 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-12-09 12:14:22,433 INFO L262 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-12-09 12:14:22,433 INFO L262 CegarLoopResult]: For program point L506-1(lines 40 585) no Hoare annotation was computed. [2020-12-09 12:14:22,433 INFO L262 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-12-09 12:14:22,433 INFO L262 CegarLoopResult]: For program point L507(line 507) no Hoare annotation was computed. [2020-12-09 12:14:22,433 INFO L262 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-12-09 12:14:22,433 INFO L262 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-12-09 12:14:22,433 INFO L262 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-12-09 12:14:22,434 INFO L262 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-12-09 12:14:22,434 INFO L262 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-12-09 12:14:22,434 INFO L262 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-12-09 12:14:22,434 INFO L262 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-12-09 12:14:22,434 INFO L262 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-12-09 12:14:22,434 INFO L262 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-12-09 12:14:22,434 INFO L262 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-12-09 12:14:22,434 INFO L262 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-12-09 12:14:22,434 INFO L262 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-12-09 12:14:22,434 INFO L262 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-12-09 12:14:22,434 INFO L262 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-12-09 12:14:22,434 INFO L262 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-12-09 12:14:22,434 INFO L262 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-12-09 12:14:22,434 INFO L262 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-12-09 12:14:22,434 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 12:14:22,434 INFO L262 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-12-09 12:14:22,434 INFO L262 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-12-09 12:14:22,434 INFO L262 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-12-09 12:14:22,435 INFO L258 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse0 (<= ~a16~0 4)) (.cse4 (<= 15 ~a8~0)) (.cse5 (= ~a21~0 1)) (.cse7 (= ~a16~0 6)) (.cse3 (<= ~a16~0 5)) (.cse6 (= ~a20~0 1)) (.cse1 (= ~a17~0 1)) (.cse2 (<= ~a8~0 13))) (or (and .cse0 .cse1 .cse2) (and .cse3 (not (= ~a7~0 1)) .cse4 .cse1) (and .cse5 .cse0 .cse6 .cse1) (and .cse7 .cse4 .cse1) (and .cse5 .cse7 (<= ~a7~0 0) .cse6 .cse1 .cse2) (and .cse3 .cse6 .cse1 .cse2) (= ~a17~0 0))) [2020-12-09 12:14:22,435 INFO L262 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-12-09 12:14:22,435 INFO L262 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-12-09 12:14:22,435 INFO L262 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-12-09 12:14:22,435 INFO L262 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-12-09 12:14:22,435 INFO L262 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-12-09 12:14:22,435 INFO L262 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-12-09 12:14:22,435 INFO L262 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-12-09 12:14:22,435 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 12:14:22,435 INFO L262 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-12-09 12:14:22,435 INFO L265 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-12-09 12:14:22,435 INFO L262 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-12-09 12:14:22,435 INFO L262 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-12-09 12:14:22,436 INFO L262 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-12-09 12:14:22,436 INFO L262 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-12-09 12:14:22,436 INFO L262 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-12-09 12:14:22,436 INFO L262 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-12-09 12:14:22,436 INFO L262 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-12-09 12:14:22,436 INFO L262 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-12-09 12:14:22,436 INFO L262 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-12-09 12:14:22,436 INFO L262 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-12-09 12:14:22,436 INFO L262 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-12-09 12:14:22,436 INFO L262 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-12-09 12:14:22,436 INFO L262 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-12-09 12:14:22,436 INFO L258 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse0 (<= ~a16~0 4)) (.cse4 (<= 15 ~a8~0)) (.cse5 (= ~a21~0 1)) (.cse7 (= ~a16~0 6)) (.cse3 (<= ~a16~0 5)) (.cse6 (= ~a20~0 1)) (.cse1 (= ~a17~0 1)) (.cse2 (<= ~a8~0 13))) (or (and .cse0 .cse1 .cse2) (and .cse3 (not (= ~a7~0 1)) .cse4 .cse1) (and .cse5 .cse0 .cse6 .cse1) (and .cse7 .cse4 .cse1) (and .cse5 .cse7 (<= ~a7~0 0) .cse6 .cse1 .cse2) (and .cse3 .cse6 .cse1 .cse2) (= ~a17~0 0))) [2020-12-09 12:14:22,436 INFO L262 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-12-09 12:14:22,436 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 507) no Hoare annotation was computed. [2020-12-09 12:14:22,436 INFO L262 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-12-09 12:14:22,437 INFO L262 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-12-09 12:14:22,437 INFO L262 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-12-09 12:14:22,437 INFO L262 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-12-09 12:14:22,437 INFO L262 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-12-09 12:14:22,437 INFO L262 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-12-09 12:14:22,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:14:22 BoogieIcfgContainer [2020-12-09 12:14:22,449 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 12:14:22,449 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 12:14:22,449 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 12:14:22,450 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 12:14:22,450 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:14:15" (3/4) ... [2020-12-09 12:14:22,452 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 12:14:22,467 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2020-12-09 12:14:22,468 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-12-09 12:14:22,470 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-12-09 12:14:22,471 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 12:14:22,550 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f7ffed96-894f-4d72-be64-01ae211884d6/bin/utaipan/witness.graphml [2020-12-09 12:14:22,550 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 12:14:22,551 INFO L168 Benchmark]: Toolchain (without parser) took 8912.69 ms. Allocated memory was 111.1 MB in the beginning and 339.7 MB in the end (delta: 228.6 MB). Free memory was 72.2 MB in the beginning and 223.9 MB in the end (delta: -151.8 MB). Peak memory consumption was 77.8 MB. Max. memory is 16.1 GB. [2020-12-09 12:14:22,551 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 111.1 MB. Free memory is still 90.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:14:22,552 INFO L168 Benchmark]: CACSL2BoogieTranslator took 364.90 ms. Allocated memory is still 111.1 MB. Free memory was 71.9 MB in the beginning and 70.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 12:14:22,552 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.21 ms. Allocated memory is still 111.1 MB. Free memory was 70.8 MB in the beginning and 65.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 12:14:22,552 INFO L168 Benchmark]: Boogie Preprocessor took 57.32 ms. Allocated memory is still 111.1 MB. Free memory was 65.0 MB in the beginning and 60.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 12:14:22,552 INFO L168 Benchmark]: RCFGBuilder took 1280.53 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 60.8 MB in the beginning and 52.4 MB in the end (delta: 8.5 MB). Peak memory consumption was 39.3 MB. Max. memory is 16.1 GB. [2020-12-09 12:14:22,553 INFO L168 Benchmark]: TraceAbstraction took 7031.18 ms. Allocated memory was 134.2 MB in the beginning and 339.7 MB in the end (delta: 205.5 MB). Free memory was 51.3 MB in the beginning and 239.7 MB in the end (delta: -188.4 MB). Peak memory consumption was 118.8 MB. Max. memory is 16.1 GB. [2020-12-09 12:14:22,553 INFO L168 Benchmark]: Witness Printer took 101.05 ms. Allocated memory is still 339.7 MB. Free memory was 239.7 MB in the beginning and 223.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-09 12:14:22,554 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 111.1 MB. Free memory is still 90.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 364.90 ms. Allocated memory is still 111.1 MB. Free memory was 71.9 MB in the beginning and 70.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 68.21 ms. Allocated memory is still 111.1 MB. Free memory was 70.8 MB in the beginning and 65.0 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.32 ms. Allocated memory is still 111.1 MB. Free memory was 65.0 MB in the beginning and 60.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1280.53 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 60.8 MB in the beginning and 52.4 MB in the end (delta: 8.5 MB). Peak memory consumption was 39.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7031.18 ms. Allocated memory was 134.2 MB in the beginning and 339.7 MB in the end (delta: 205.5 MB). Free memory was 51.3 MB in the beginning and 239.7 MB in the end (delta: -188.4 MB). Peak memory consumption was 118.8 MB. Max. memory is 16.1 GB. * Witness Printer took 101.05 ms. Allocated memory is still 339.7 MB. Free memory was 239.7 MB in the beginning and 223.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 507]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((((a16 <= 4 && a17 == 1) && a8 <= 13) || (((a16 <= 5 && !(a7 == 1)) && 15 <= a8) && a17 == 1)) || (((a21 == 1 && a16 <= 4) && a20 == 1) && a17 == 1)) || ((a16 == 6 && 15 <= a8) && a17 == 1)) || (((((a21 == 1 && a16 == 6) && a7 <= 0) && a20 == 1) && a17 == 1) && a8 <= 13)) || (((a16 <= 5 && a20 == 1) && a17 == 1) && a8 <= 13)) || a17 == 0 - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: (((((((a16 <= 4 && a17 == 1) && a8 <= 13) || (((a16 <= 5 && !(a7 == 1)) && 15 <= a8) && a17 == 1)) || (((a21 == 1 && a16 <= 4) && a20 == 1) && a17 == 1)) || ((a16 == 6 && 15 <= a8) && a17 == 1)) || (((((a21 == 1 && a16 == 6) && a7 <= 0) && a20 == 1) && a17 == 1) && a8 <= 13)) || (((a16 <= 5 && a20 == 1) && a17 == 1) && a8 <= 13)) || a17 == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.6s, OverallIterations: 12, TraceHistogramMax: 7, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 596 SDtfs, 728 SDslu, 50 SDs, 0 SdLazy, 2659 SolverSat, 662 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1411 GetRequests, 1382 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1281occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 1493 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 47 NumberOfFragments, 167 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2752 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 162 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 2292 NumberOfCodeBlocks, 2292 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 2963 ConstructedInterpolants, 0 QuantifiedInterpolants, 2153112 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1469 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 18 InterpolantComputations, 15 PerfectInterpolantSequences, 3085/3269 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...