./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label52.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1a2c332b-9fad-4030-9faa-ca0508cdd14c/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1a2c332b-9fad-4030-9faa-ca0508cdd14c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1a2c332b-9fad-4030-9faa-ca0508cdd14c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1a2c332b-9fad-4030-9faa-ca0508cdd14c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label52.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1a2c332b-9fad-4030-9faa-ca0508cdd14c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1a2c332b-9fad-4030-9faa-ca0508cdd14c/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 2a6f9dd10b9200c61377ed7a907ef50ee4969a78 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:43:48,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:43:48,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:43:48,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:43:48,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:43:48,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:43:48,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:43:48,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:43:48,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:43:48,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:43:48,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:43:48,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:43:48,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:43:48,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:43:48,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:43:48,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:43:48,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:43:48,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:43:48,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:43:48,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:43:48,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:43:48,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:43:48,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:43:48,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:43:48,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:43:48,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:43:48,613 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:43:48,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:43:48,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:43:48,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:43:48,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:43:48,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:43:48,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:43:48,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:43:48,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:43:48,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:43:48,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:43:48,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:43:48,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:43:48,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:43:48,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:43:48,634 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1a2c332b-9fad-4030-9faa-ca0508cdd14c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:43:48,682 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:43:48,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:43:48,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:43:48,684 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:43:48,685 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:43:48,685 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:43:48,685 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:43:48,685 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:43:48,685 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:43:48,686 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:43:48,687 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:43:48,687 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:43:48,687 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:43:48,688 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:43:48,688 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:43:48,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:43:48,690 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:43:48,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:43:48,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:43:48,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:43:48,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:43:48,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:43:48,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:43:48,691 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:43:48,691 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:43:48,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:43:48,692 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:43:48,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:43:48,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:43:48,694 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:43:48,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:43:48,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:43:48,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:43:48,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:43:48,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:43:48,696 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:43:48,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:43:48,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:43:48,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:43:48,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:43:48,697 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_1a2c332b-9fad-4030-9faa-ca0508cdd14c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1a2c332b-9fad-4030-9faa-ca0508cdd14c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a6f9dd10b9200c61377ed7a907ef50ee4969a78 [2020-11-28 07:43:48,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:43:49,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:43:49,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:43:49,029 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:43:49,030 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:43:49,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1a2c332b-9fad-4030-9faa-ca0508cdd14c/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label52.c [2020-11-28 07:43:49,103 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1a2c332b-9fad-4030-9faa-ca0508cdd14c/bin/utaipan/data/42fb2348c/2807d5c5778f4058bb63784663beceea/FLAG5db2069be [2020-11-28 07:43:49,719 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:43:49,720 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1a2c332b-9fad-4030-9faa-ca0508cdd14c/sv-benchmarks/c/eca-rers2012/Problem01_label52.c [2020-11-28 07:43:49,742 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1a2c332b-9fad-4030-9faa-ca0508cdd14c/bin/utaipan/data/42fb2348c/2807d5c5778f4058bb63784663beceea/FLAG5db2069be [2020-11-28 07:43:49,979 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1a2c332b-9fad-4030-9faa-ca0508cdd14c/bin/utaipan/data/42fb2348c/2807d5c5778f4058bb63784663beceea [2020-11-28 07:43:49,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:43:49,983 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:43:49,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:43:49,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:43:49,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:43:49,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:43:49" (1/1) ... [2020-11-28 07:43:49,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36e513e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:49, skipping insertion in model container [2020-11-28 07:43:49,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:43:49" (1/1) ... [2020-11-28 07:43:50,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:43:50,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:43:50,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:43:50,567 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:43:50,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:43:50,714 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:43:50,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50 WrapperNode [2020-11-28 07:43:50,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:43:50,717 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:43:50,717 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:43:50,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:43:50,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,825 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:43:50,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:43:50,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:43:50,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:43:50,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... [2020-11-28 07:43:50,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:43:50,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:43:50,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:43:50,941 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:43:50,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a2c332b-9fad-4030-9faa-ca0508cdd14c/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 [2020-11-28 07:43:51,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:43:51,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:43:51,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:43:51,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:43:53,597 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:43:53,598 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:43:53,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:43:53 BoogieIcfgContainer [2020-11-28 07:43:53,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:43:53,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:43:53,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:43:53,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:43:53,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:43:49" (1/3) ... [2020-11-28 07:43:53,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e34f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:43:53, skipping insertion in model container [2020-11-28 07:43:53,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:43:50" (2/3) ... [2020-11-28 07:43:53,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e34f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:43:53, skipping insertion in model container [2020-11-28 07:43:53,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:43:53" (3/3) ... [2020-11-28 07:43:53,611 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label52.c [2020-11-28 07:43:53,626 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:43:53,631 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:43:53,643 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:43:53,670 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:43:53,670 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:43:53,670 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:43:53,671 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:43:53,671 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:43:53,671 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:43:53,671 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:43:53,671 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:43:53,686 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-28 07:43:53,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-28 07:43:53,694 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:53,695 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] [2020-11-28 07:43:53,695 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:53,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:53,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1520714093, now seen corresponding path program 1 times [2020-11-28 07:43:53,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:53,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809119490] [2020-11-28 07:43:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:54,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809119490] [2020-11-28 07:43:54,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:54,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:43:54,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003024155] [2020-11-28 07:43:54,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:54,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:54,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:54,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:54,204 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-28 07:43:54,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:54,930 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-28 07:43:54,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:54,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-28 07:43:54,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:54,944 INFO L225 Difference]: With dead ends: 224 [2020-11-28 07:43:54,944 INFO L226 Difference]: Without dead ends: 145 [2020-11-28 07:43:54,947 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 [2020-11-28 07:43:54,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-28 07:43:55,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-28 07:43:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-28 07:43:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2020-11-28 07:43:55,030 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2020-11-28 07:43:55,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:55,032 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2020-11-28 07:43:55,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:55,032 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2020-11-28 07:43:55,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-28 07:43:55,038 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:55,038 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] [2020-11-28 07:43:55,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:43:55,039 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:55,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:55,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1350081855, now seen corresponding path program 1 times [2020-11-28 07:43:55,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:55,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920686612] [2020-11-28 07:43:55,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:55,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920686612] [2020-11-28 07:43:55,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:55,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:43:55,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922011067] [2020-11-28 07:43:55,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:55,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:55,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:55,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:55,127 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2020-11-28 07:43:55,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:55,682 INFO L93 Difference]: Finished difference Result 433 states and 775 transitions. [2020-11-28 07:43:55,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:55,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-11-28 07:43:55,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:55,685 INFO L225 Difference]: With dead ends: 433 [2020-11-28 07:43:55,686 INFO L226 Difference]: Without dead ends: 289 [2020-11-28 07:43:55,687 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 [2020-11-28 07:43:55,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-11-28 07:43:55,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2020-11-28 07:43:55,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-28 07:43:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 480 transitions. [2020-11-28 07:43:55,732 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 480 transitions. Word has length 76 [2020-11-28 07:43:55,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:55,733 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 480 transitions. [2020-11-28 07:43:55,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:55,733 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 480 transitions. [2020-11-28 07:43:55,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-11-28 07:43:55,742 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:55,742 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-11-28 07:43:55,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:43:55,743 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:55,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:55,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1761101897, now seen corresponding path program 1 times [2020-11-28 07:43:55,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:55,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309294323] [2020-11-28 07:43:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:55,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309294323] [2020-11-28 07:43:55,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:55,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:43:55,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814549023] [2020-11-28 07:43:55,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:55,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:55,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:55,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:55,851 INFO L87 Difference]: Start difference. First operand 287 states and 480 transitions. Second operand 3 states. [2020-11-28 07:43:56,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:56,334 INFO L93 Difference]: Finished difference Result 857 states and 1437 transitions. [2020-11-28 07:43:56,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:56,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-11-28 07:43:56,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:56,340 INFO L225 Difference]: With dead ends: 857 [2020-11-28 07:43:56,341 INFO L226 Difference]: Without dead ends: 571 [2020-11-28 07:43:56,343 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 [2020-11-28 07:43:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-11-28 07:43:56,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2020-11-28 07:43:56,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-28 07:43:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 886 transitions. [2020-11-28 07:43:56,387 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 886 transitions. Word has length 80 [2020-11-28 07:43:56,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:56,388 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 886 transitions. [2020-11-28 07:43:56,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:56,391 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 886 transitions. [2020-11-28 07:43:56,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-11-28 07:43:56,393 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:56,393 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] [2020-11-28 07:43:56,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:43:56,393 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:56,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:56,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1863724462, now seen corresponding path program 1 times [2020-11-28 07:43:56,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:56,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352540879] [2020-11-28 07:43:56,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:56,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352540879] [2020-11-28 07:43:56,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:56,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:43:56,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017212961] [2020-11-28 07:43:56,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:43:56,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:56,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:43:56,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:43:56,481 INFO L87 Difference]: Start difference. First operand 571 states and 886 transitions. Second operand 4 states. [2020-11-28 07:43:57,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:57,181 INFO L93 Difference]: Finished difference Result 1425 states and 2187 transitions. [2020-11-28 07:43:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:43:57,181 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-11-28 07:43:57,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:57,204 INFO L225 Difference]: With dead ends: 1425 [2020-11-28 07:43:57,204 INFO L226 Difference]: Without dead ends: 855 [2020-11-28 07:43:57,205 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 [2020-11-28 07:43:57,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2020-11-28 07:43:57,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 713. [2020-11-28 07:43:57,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-11-28 07:43:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1058 transitions. [2020-11-28 07:43:57,237 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1058 transitions. Word has length 83 [2020-11-28 07:43:57,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:57,238 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1058 transitions. [2020-11-28 07:43:57,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:43:57,238 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1058 transitions. [2020-11-28 07:43:57,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-11-28 07:43:57,240 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:57,241 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2020-11-28 07:43:57,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:43:57,241 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:57,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:57,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1450809923, now seen corresponding path program 1 times [2020-11-28 07:43:57,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:57,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011202498] [2020-11-28 07:43:57,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:57,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011202498] [2020-11-28 07:43:57,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:57,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:43:57,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298336155] [2020-11-28 07:43:57,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:57,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:57,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:57,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:57,317 INFO L87 Difference]: Start difference. First operand 713 states and 1058 transitions. Second operand 3 states. [2020-11-28 07:43:57,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:57,840 INFO L93 Difference]: Finished difference Result 1922 states and 2892 transitions. [2020-11-28 07:43:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:57,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-11-28 07:43:57,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:57,848 INFO L225 Difference]: With dead ends: 1922 [2020-11-28 07:43:57,848 INFO L226 Difference]: Without dead ends: 1210 [2020-11-28 07:43:57,850 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 [2020-11-28 07:43:57,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-28 07:43:57,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1139. [2020-11-28 07:43:57,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:43:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1718 transitions. [2020-11-28 07:43:57,884 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1718 transitions. Word has length 84 [2020-11-28 07:43:57,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:57,884 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1718 transitions. [2020-11-28 07:43:57,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1718 transitions. [2020-11-28 07:43:57,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-28 07:43:57,887 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:57,887 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] [2020-11-28 07:43:57,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:43:57,891 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:57,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash 228746536, now seen corresponding path program 1 times [2020-11-28 07:43:57,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:57,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131807611] [2020-11-28 07:43:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:57,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131807611] [2020-11-28 07:43:57,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:57,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:43:57,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194843975] [2020-11-28 07:43:57,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:57,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:57,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:57,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:57,988 INFO L87 Difference]: Start difference. First operand 1139 states and 1718 transitions. Second operand 3 states. [2020-11-28 07:43:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:58,424 INFO L93 Difference]: Finished difference Result 2419 states and 3607 transitions. [2020-11-28 07:43:58,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:58,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-11-28 07:43:58,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:58,439 INFO L225 Difference]: With dead ends: 2419 [2020-11-28 07:43:58,439 INFO L226 Difference]: Without dead ends: 1281 [2020-11-28 07:43:58,441 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 [2020-11-28 07:43:58,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-28 07:43:58,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1210. [2020-11-28 07:43:58,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-11-28 07:43:58,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1777 transitions. [2020-11-28 07:43:58,479 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1777 transitions. Word has length 86 [2020-11-28 07:43:58,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:58,480 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1777 transitions. [2020-11-28 07:43:58,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:58,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1777 transitions. [2020-11-28 07:43:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-28 07:43:58,489 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:58,489 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] [2020-11-28 07:43:58,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:43:58,489 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:58,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:58,490 INFO L82 PathProgramCache]: Analyzing trace with hash -222273764, now seen corresponding path program 1 times [2020-11-28 07:43:58,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:58,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573758336] [2020-11-28 07:43:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 07:43:58,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573758336] [2020-11-28 07:43:58,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:58,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:43:58,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759152303] [2020-11-28 07:43:58,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:43:58,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:58,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:43:58,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:43:58,590 INFO L87 Difference]: Start difference. First operand 1210 states and 1777 transitions. Second operand 3 states. [2020-11-28 07:43:59,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:59,124 INFO L93 Difference]: Finished difference Result 2632 states and 3857 transitions. [2020-11-28 07:43:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:43:59,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-11-28 07:43:59,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:59,133 INFO L225 Difference]: With dead ends: 2632 [2020-11-28 07:43:59,134 INFO L226 Difference]: Without dead ends: 1352 [2020-11-28 07:43:59,136 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 [2020-11-28 07:43:59,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-11-28 07:43:59,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1352. [2020-11-28 07:43:59,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-11-28 07:43:59,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1739 transitions. [2020-11-28 07:43:59,188 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1739 transitions. Word has length 87 [2020-11-28 07:43:59,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:43:59,188 INFO L481 AbstractCegarLoop]: Abstraction has 1352 states and 1739 transitions. [2020-11-28 07:43:59,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:43:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1739 transitions. [2020-11-28 07:43:59,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-11-28 07:43:59,191 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:43:59,192 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] [2020-11-28 07:43:59,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:43:59,192 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:43:59,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:43:59,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2092173650, now seen corresponding path program 1 times [2020-11-28 07:43:59,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:43:59,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108597535] [2020-11-28 07:43:59,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:43:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:43:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:43:59,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108597535] [2020-11-28 07:43:59,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:43:59,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:43:59,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381271742] [2020-11-28 07:43:59,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:43:59,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:43:59,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:43:59,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:43:59,301 INFO L87 Difference]: Start difference. First operand 1352 states and 1739 transitions. Second operand 4 states. [2020-11-28 07:43:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:43:59,962 INFO L93 Difference]: Finished difference Result 2703 states and 3477 transitions. [2020-11-28 07:43:59,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:43:59,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-11-28 07:43:59,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:43:59,969 INFO L225 Difference]: With dead ends: 2703 [2020-11-28 07:43:59,969 INFO L226 Difference]: Without dead ends: 1352 [2020-11-28 07:43:59,971 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 [2020-11-28 07:43:59,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-11-28 07:44:00,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1352. [2020-11-28 07:44:00,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-11-28 07:44:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1686 transitions. [2020-11-28 07:44:00,009 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1686 transitions. Word has length 90 [2020-11-28 07:44:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:00,010 INFO L481 AbstractCegarLoop]: Abstraction has 1352 states and 1686 transitions. [2020-11-28 07:44:00,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:44:00,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1686 transitions. [2020-11-28 07:44:00,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-11-28 07:44:00,013 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:00,013 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] [2020-11-28 07:44:00,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:44:00,015 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:00,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:00,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1737635215, now seen corresponding path program 1 times [2020-11-28 07:44:00,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:00,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57340100] [2020-11-28 07:44:00,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-28 07:44:00,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57340100] [2020-11-28 07:44:00,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:44:00,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:44:00,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876642527] [2020-11-28 07:44:00,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:44:00,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:00,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:44:00,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:44:00,144 INFO L87 Difference]: Start difference. First operand 1352 states and 1686 transitions. Second operand 3 states. [2020-11-28 07:44:00,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:00,597 INFO L93 Difference]: Finished difference Result 3129 states and 3900 transitions. [2020-11-28 07:44:00,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:44:00,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-11-28 07:44:00,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:00,607 INFO L225 Difference]: With dead ends: 3129 [2020-11-28 07:44:00,607 INFO L226 Difference]: Without dead ends: 1778 [2020-11-28 07:44:00,609 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 [2020-11-28 07:44:00,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2020-11-28 07:44:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1352. [2020-11-28 07:44:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-11-28 07:44:00,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1662 transitions. [2020-11-28 07:44:00,646 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1662 transitions. Word has length 108 [2020-11-28 07:44:00,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:00,647 INFO L481 AbstractCegarLoop]: Abstraction has 1352 states and 1662 transitions. [2020-11-28 07:44:00,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:44:00,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1662 transitions. [2020-11-28 07:44:00,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-11-28 07:44:00,651 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:00,651 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-11-28 07:44:00,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:44:00,651 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:00,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:00,652 INFO L82 PathProgramCache]: Analyzing trace with hash 566178550, now seen corresponding path program 1 times [2020-11-28 07:44:00,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:00,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596351492] [2020-11-28 07:44:00,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-11-28 07:44:00,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596351492] [2020-11-28 07:44:00,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:44:00,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:44:00,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512003791] [2020-11-28 07:44:00,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:44:00,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:00,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:44:00,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:44:00,782 INFO L87 Difference]: Start difference. First operand 1352 states and 1662 transitions. Second operand 3 states. [2020-11-28 07:44:01,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:01,202 INFO L93 Difference]: Finished difference Result 3058 states and 3766 transitions. [2020-11-28 07:44:01,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:44:01,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 176 [2020-11-28 07:44:01,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:01,212 INFO L225 Difference]: With dead ends: 3058 [2020-11-28 07:44:01,212 INFO L226 Difference]: Without dead ends: 1707 [2020-11-28 07:44:01,214 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 [2020-11-28 07:44:01,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-11-28 07:44:01,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 997. [2020-11-28 07:44:01,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-11-28 07:44:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1238 transitions. [2020-11-28 07:44:01,248 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1238 transitions. Word has length 176 [2020-11-28 07:44:01,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:01,248 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1238 transitions. [2020-11-28 07:44:01,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:44:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1238 transitions. [2020-11-28 07:44:01,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-11-28 07:44:01,252 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:01,253 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2020-11-28 07:44:01,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 07:44:01,253 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:01,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:01,254 INFO L82 PathProgramCache]: Analyzing trace with hash 573916254, now seen corresponding path program 1 times [2020-11-28 07:44:01,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:01,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725597751] [2020-11-28 07:44:01,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-11-28 07:44:01,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725597751] [2020-11-28 07:44:01,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:44:01,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:44:01,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877273369] [2020-11-28 07:44:01,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:44:01,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:01,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:44:01,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:44:01,480 INFO L87 Difference]: Start difference. First operand 997 states and 1238 transitions. Second operand 4 states. [2020-11-28 07:44:01,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:01,999 INFO L93 Difference]: Finished difference Result 2164 states and 2657 transitions. [2020-11-28 07:44:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:44:02,000 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 219 [2020-11-28 07:44:02,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:02,006 INFO L225 Difference]: With dead ends: 2164 [2020-11-28 07:44:02,006 INFO L226 Difference]: Without dead ends: 1168 [2020-11-28 07:44:02,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:44:02,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2020-11-28 07:44:02,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1068. [2020-11-28 07:44:02,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-28 07:44:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1291 transitions. [2020-11-28 07:44:02,060 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1291 transitions. Word has length 219 [2020-11-28 07:44:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:02,062 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1291 transitions. [2020-11-28 07:44:02,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:44:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1291 transitions. [2020-11-28 07:44:02,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-11-28 07:44:02,067 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:02,068 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2020-11-28 07:44:02,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 07:44:02,068 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:02,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:02,069 INFO L82 PathProgramCache]: Analyzing trace with hash 575701463, now seen corresponding path program 1 times [2020-11-28 07:44:02,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:02,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429055958] [2020-11-28 07:44:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-11-28 07:44:02,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429055958] [2020-11-28 07:44:02,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:44:02,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:44:02,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277371703] [2020-11-28 07:44:02,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:44:02,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:02,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:44:02,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:44:02,233 INFO L87 Difference]: Start difference. First operand 1068 states and 1291 transitions. Second operand 3 states. [2020-11-28 07:44:02,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:02,604 INFO L93 Difference]: Finished difference Result 2135 states and 2581 transitions. [2020-11-28 07:44:02,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:44:02,605 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 232 [2020-11-28 07:44:02,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:02,610 INFO L225 Difference]: With dead ends: 2135 [2020-11-28 07:44:02,611 INFO L226 Difference]: Without dead ends: 1068 [2020-11-28 07:44:02,612 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 [2020-11-28 07:44:02,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2020-11-28 07:44:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1068. [2020-11-28 07:44:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-28 07:44:02,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1259 transitions. [2020-11-28 07:44:02,645 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1259 transitions. Word has length 232 [2020-11-28 07:44:02,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:02,646 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1259 transitions. [2020-11-28 07:44:02,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:44:02,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1259 transitions. [2020-11-28 07:44:02,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-11-28 07:44:02,650 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:02,651 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:44:02,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-28 07:44:02,651 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:02,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:02,652 INFO L82 PathProgramCache]: Analyzing trace with hash -588452875, now seen corresponding path program 1 times [2020-11-28 07:44:02,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:02,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942111456] [2020-11-28 07:44:02,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 256 proven. 142 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-28 07:44:03,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942111456] [2020-11-28 07:44:03,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004561487] [2020-11-28 07:44:03,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a2c332b-9fad-4030-9faa-ca0508cdd14c/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 [2020-11-28 07:44:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:03,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:44:03,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:44:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-11-28 07:44:03,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:44:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-11-28 07:44:03,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:44:03,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2020-11-28 07:44:03,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402579927] [2020-11-28 07:44:03,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:44:03,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:03,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:44:03,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:44:03,590 INFO L87 Difference]: Start difference. First operand 1068 states and 1259 transitions. Second operand 3 states. [2020-11-28 07:44:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:04,002 INFO L93 Difference]: Finished difference Result 2346 states and 2757 transitions. [2020-11-28 07:44:04,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:44:04,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-11-28 07:44:04,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:04,003 INFO L225 Difference]: With dead ends: 2346 [2020-11-28 07:44:04,003 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:44:04,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 481 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:44:04,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:44:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:44:04,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:44:04,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:44:04,007 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 241 [2020-11-28 07:44:04,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:04,007 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:44:04,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:44:04,007 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:44:04,007 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:44:04,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-28 07:44:04,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:44:04,757 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2020-11-28 07:44:05,018 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2020-11-28 07:44:05,021 INFO L274 CegarLoopResult]: For program point L564(line 564) no Hoare annotation was computed. [2020-11-28 07:44:05,022 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-28 07:44:05,022 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-28 07:44:05,022 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-28 07:44:05,022 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-28 07:44:05,022 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-28 07:44:05,022 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-28 07:44:05,022 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-28 07:44:05,022 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-28 07:44:05,022 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-28 07:44:05,022 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-28 07:44:05,023 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-28 07:44:05,023 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-28 07:44:05,023 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-28 07:44:05,023 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-28 07:44:05,023 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-28 07:44:05,023 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-28 07:44:05,023 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-28 07:44:05,023 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-28 07:44:05,023 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-28 07:44:05,023 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-28 07:44:05,023 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-28 07:44:05,024 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-28 07:44:05,024 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-28 07:44:05,024 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-28 07:44:05,024 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-28 07:44:05,024 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-28 07:44:05,024 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-28 07:44:05,024 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-28 07:44:05,024 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-28 07:44:05,024 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-28 07:44:05,024 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-28 07:44:05,025 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-28 07:44:05,025 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-28 07:44:05,025 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-28 07:44:05,025 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-28 07:44:05,025 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-28 07:44:05,025 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:44:05,025 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-28 07:44:05,025 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-28 07:44:05,025 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-28 07:44:05,026 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse4 (= ~a20~0 1))) (let ((.cse0 (<= ~a16~0 5)) (.cse3 (= ~a21~0 1)) (.cse1 (not .cse4)) (.cse5 (<= 15 ~a8~0)) (.cse6 (= ~a16~0 6)) (.cse2 (<= ~a8~0 13))) (or (and .cse0 .cse1) (and .cse0 .cse2) (and .cse3 (<= ~a7~0 0) .cse4 (= ~a17~0 1)) (and .cse3 .cse0) (and .cse3 .cse4 .cse5) (and .cse6 .cse1 .cse5) (and .cse6 .cse4 .cse2)))) [2020-11-28 07:44:05,026 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-28 07:44:05,026 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-28 07:44:05,026 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-28 07:44:05,026 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-28 07:44:05,026 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-28 07:44:05,026 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-28 07:44:05,026 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-28 07:44:05,026 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:44:05,027 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-28 07:44:05,027 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-28 07:44:05,027 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-28 07:44:05,027 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-28 07:44:05,027 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-28 07:44:05,027 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-28 07:44:05,031 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-28 07:44:05,031 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-28 07:44:05,031 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-28 07:44:05,032 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-28 07:44:05,032 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-28 07:44:05,032 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-28 07:44:05,032 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-28 07:44:05,032 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-28 07:44:05,032 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-28 07:44:05,033 INFO L274 CegarLoopResult]: For program point L560-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:44:05,033 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse4 (= ~a20~0 1))) (let ((.cse0 (<= ~a16~0 5)) (.cse3 (= ~a21~0 1)) (.cse1 (not .cse4)) (.cse5 (<= 15 ~a8~0)) (.cse6 (= ~a16~0 6)) (.cse2 (<= ~a8~0 13))) (or (and .cse0 .cse1) (and .cse0 .cse2) (and .cse3 (<= ~a7~0 0) .cse4 (= ~a17~0 1)) (and .cse3 .cse0) (and .cse3 .cse4 .cse5) (and .cse6 .cse1 .cse5) (and .cse6 .cse4 .cse2)))) [2020-11-28 07:44:05,033 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-28 07:44:05,033 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:44:05,033 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-28 07:44:05,034 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-28 07:44:05,034 INFO L274 CegarLoopResult]: For program point L563-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:44:05,034 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-28 07:44:05,034 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-28 07:44:05,034 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-28 07:44:05,034 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-28 07:44:05,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:44:05 BoogieIcfgContainer [2020-11-28 07:44:05,070 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:44:05,070 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:44:05,070 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:44:05,071 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:44:05,071 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:43:53" (3/4) ... [2020-11-28 07:44:05,074 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:44:05,107 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2020-11-28 07:44:05,109 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-11-28 07:44:05,111 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-28 07:44:05,112 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:44:05,304 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1a2c332b-9fad-4030-9faa-ca0508cdd14c/bin/utaipan/witness.graphml [2020-11-28 07:44:05,304 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:44:05,305 INFO L168 Benchmark]: Toolchain (without parser) took 15322.22 ms. Allocated memory was 123.7 MB in the beginning and 348.1 MB in the end (delta: 224.4 MB). Free memory was 91.7 MB in the beginning and 284.5 MB in the end (delta: -192.8 MB). Peak memory consumption was 32.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:05,306 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 79.7 MB. Free memory was 37.3 MB in the beginning and 37.3 MB in the end (delta: 42.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:05,306 INFO L168 Benchmark]: CACSL2BoogieTranslator took 731.66 ms. Allocated memory is still 123.7 MB. Free memory was 91.4 MB in the beginning and 82.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:05,307 INFO L168 Benchmark]: Boogie Procedure Inliner took 108.81 ms. Allocated memory is still 123.7 MB. Free memory was 82.2 MB in the beginning and 76.4 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:05,307 INFO L168 Benchmark]: Boogie Preprocessor took 112.19 ms. Allocated memory is still 123.7 MB. Free memory was 76.4 MB in the beginning and 72.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:05,308 INFO L168 Benchmark]: RCFGBuilder took 2660.67 ms. Allocated memory was 123.7 MB in the beginning and 155.2 MB in the end (delta: 31.5 MB). Free memory was 72.2 MB in the beginning and 115.4 MB in the end (delta: -43.3 MB). Peak memory consumption was 53.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:05,308 INFO L168 Benchmark]: TraceAbstraction took 11467.42 ms. Allocated memory was 155.2 MB in the beginning and 348.1 MB in the end (delta: 192.9 MB). Free memory was 115.4 MB in the beginning and 300.2 MB in the end (delta: -184.8 MB). Peak memory consumption was 161.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:05,309 INFO L168 Benchmark]: Witness Printer took 234.09 ms. Allocated memory is still 348.1 MB. Free memory was 300.2 MB in the beginning and 284.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:05,311 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 79.7 MB. Free memory was 37.3 MB in the beginning and 37.3 MB in the end (delta: 42.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 731.66 ms. Allocated memory is still 123.7 MB. Free memory was 91.4 MB in the beginning and 82.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 108.81 ms. Allocated memory is still 123.7 MB. Free memory was 82.2 MB in the beginning and 76.4 MB in the end (delta: 5.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 112.19 ms. Allocated memory is still 123.7 MB. Free memory was 76.4 MB in the beginning and 72.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2660.67 ms. Allocated memory was 123.7 MB in the beginning and 155.2 MB in the end (delta: 31.5 MB). Free memory was 72.2 MB in the beginning and 115.4 MB in the end (delta: -43.3 MB). Peak memory consumption was 53.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11467.42 ms. Allocated memory was 155.2 MB in the beginning and 348.1 MB in the end (delta: 192.9 MB). Free memory was 115.4 MB in the beginning and 300.2 MB in the end (delta: -184.8 MB). Peak memory consumption was 161.2 MB. Max. memory is 16.1 GB. * Witness Printer took 234.09 ms. Allocated memory is still 348.1 MB. Free memory was 300.2 MB in the beginning and 284.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((a16 <= 5 && !(a20 == 1)) || (a16 <= 5 && a8 <= 13)) || (((a21 == 1 && a7 <= 0) && a20 == 1) && a17 == 1)) || (a21 == 1 && a16 <= 5)) || ((a21 == 1 && a20 == 1) && 15 <= a8)) || ((a16 == 6 && !(a20 == 1)) && 15 <= a8)) || ((a16 == 6 && a20 == 1) && a8 <= 13) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((a16 <= 5 && !(a20 == 1)) || (a16 <= 5 && a8 <= 13)) || (((a21 == 1 && a7 <= 0) && a20 == 1) && a17 == 1)) || (a21 == 1 && a16 <= 5)) || ((a21 == 1 && a20 == 1) && 15 <= a8)) || ((a16 == 6 && !(a20 == 1)) && 15 <= a8)) || ((a16 == 6 && a20 == 1) && a8 <= 13) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.5s, OverallIterations: 13, TraceHistogramMax: 8, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 648 SDtfs, 917 SDslu, 58 SDs, 0 SdLazy, 2946 SolverSat, 760 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 518 GetRequests, 497 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1352occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 13 MinimizatonAttempts, 1522 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 43 NumberOfFragments, 135 HoareAnnotationTreeSize, 3 FomulaSimplifications, 4730 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 390 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 1874 NumberOfCodeBlocks, 1874 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 2100 ConstructedInterpolants, 0 QuantifiedInterpolants, 1061750 SizeOfPredicates, 1 NumberOfNonLiveVariables, 555 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 15 InterpolantComputations, 14 PerfectInterpolantSequences, 2218/2360 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...