./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label43.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_5abdb9d4-c779-417b-a90d-1ec1a5c9406d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5abdb9d4-c779-417b-a90d-1ec1a5c9406d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5abdb9d4-c779-417b-a90d-1ec1a5c9406d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5abdb9d4-c779-417b-a90d-1ec1a5c9406d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label43.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5abdb9d4-c779-417b-a90d-1ec1a5c9406d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5abdb9d4-c779-417b-a90d-1ec1a5c9406d/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 454dd493ee9dcdf0cdb95ddac4747f0f0acba84f ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:37:15,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:37:15,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:37:15,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:37:15,732 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:37:15,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:37:15,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:37:15,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:37:15,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:37:15,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:37:15,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:37:15,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:37:15,746 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:37:15,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:37:15,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:37:15,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:37:15,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:37:15,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:37:15,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:37:15,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:37:15,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:37:15,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:37:15,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:37:15,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:37:15,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:37:15,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:37:15,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:37:15,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:37:15,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:37:15,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:37:15,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:37:15,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:37:15,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:37:15,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:37:15,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:37:15,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:37:15,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:37:15,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:37:15,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:37:15,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:37:15,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:37:15,803 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5abdb9d4-c779-417b-a90d-1ec1a5c9406d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:37:15,853 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:37:15,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:37:15,855 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:37:15,855 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:37:15,856 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:37:15,856 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:37:15,856 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:37:15,856 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:37:15,857 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:37:15,857 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:37:15,858 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:37:15,858 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:37:15,859 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:37:15,859 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:37:15,859 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:37:15,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:37:15,860 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:37:15,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:37:15,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:37:15,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:37:15,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:37:15,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:37:15,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:37:15,862 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:37:15,862 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:37:15,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:37:15,863 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:37:15,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:37:15,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:37:15,865 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:37:15,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:37:15,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:37:15,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:37:15,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:37:15,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:37:15,867 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:37:15,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:37:15,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:37:15,868 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:37:15,868 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:37:15,868 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_5abdb9d4-c779-417b-a90d-1ec1a5c9406d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5abdb9d4-c779-417b-a90d-1ec1a5c9406d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 454dd493ee9dcdf0cdb95ddac4747f0f0acba84f [2020-11-28 07:37:16,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:37:16,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:37:16,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:37:16,166 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:37:16,167 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:37:16,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5abdb9d4-c779-417b-a90d-1ec1a5c9406d/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label43.c [2020-11-28 07:37:16,272 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5abdb9d4-c779-417b-a90d-1ec1a5c9406d/bin/utaipan/data/31702696a/eb0d03a09c0e43db8b0580ba38b89eb0/FLAG3a6a09b97 [2020-11-28 07:37:17,002 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:37:17,002 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5abdb9d4-c779-417b-a90d-1ec1a5c9406d/sv-benchmarks/c/eca-rers2012/Problem01_label43.c [2020-11-28 07:37:17,015 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5abdb9d4-c779-417b-a90d-1ec1a5c9406d/bin/utaipan/data/31702696a/eb0d03a09c0e43db8b0580ba38b89eb0/FLAG3a6a09b97 [2020-11-28 07:37:17,225 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5abdb9d4-c779-417b-a90d-1ec1a5c9406d/bin/utaipan/data/31702696a/eb0d03a09c0e43db8b0580ba38b89eb0 [2020-11-28 07:37:17,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:37:17,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:37:17,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:37:17,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:37:17,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:37:17,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:37:17" (1/1) ... [2020-11-28 07:37:17,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1821203b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:17, skipping insertion in model container [2020-11-28 07:37:17,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:37:17" (1/1) ... [2020-11-28 07:37:17,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:37:17,288 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:37:17,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:37:17,724 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:37:17,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:37:17,890 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:37:17,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:17 WrapperNode [2020-11-28 07:37:17,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:37:17,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:37:17,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:37:17,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:37:17,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:17" (1/1) ... [2020-11-28 07:37:17,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:17" (1/1) ... [2020-11-28 07:37:17,966 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:37:17,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:37:17,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:37:17,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:37:17,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:17" (1/1) ... [2020-11-28 07:37:17,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:17" (1/1) ... [2020-11-28 07:37:17,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:17" (1/1) ... [2020-11-28 07:37:17,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:17" (1/1) ... [2020-11-28 07:37:18,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:17" (1/1) ... [2020-11-28 07:37:18,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:17" (1/1) ... [2020-11-28 07:37:18,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:17" (1/1) ... [2020-11-28 07:37:18,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:37:18,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:37:18,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:37:18,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:37:18,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5abdb9d4-c779-417b-a90d-1ec1a5c9406d/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 07:37:18,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:37:18,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:37:18,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:37:18,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:37:20,714 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:37:20,714 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:37:20,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:37:20 BoogieIcfgContainer [2020-11-28 07:37:20,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:37:20,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:37:20,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:37:20,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:37:20,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:37:17" (1/3) ... [2020-11-28 07:37:20,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46df3ad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:37:20, skipping insertion in model container [2020-11-28 07:37:20,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:17" (2/3) ... [2020-11-28 07:37:20,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46df3ad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:37:20, skipping insertion in model container [2020-11-28 07:37:20,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:37:20" (3/3) ... [2020-11-28 07:37:20,726 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label43.c [2020-11-28 07:37:20,737 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:37:20,742 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:37:20,754 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:37:20,778 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:37:20,779 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:37:20,779 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:37:20,779 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:37:20,779 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:37:20,779 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:37:20,779 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:37:20,780 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:37:20,799 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-28 07:37:20,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-28 07:37:20,808 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:20,809 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 07:37:20,810 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:20,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:20,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1520714605, now seen corresponding path program 1 times [2020-11-28 07:37:20,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:20,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582602467] [2020-11-28 07:37:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:21,333 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 07:37:21,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582602467] [2020-11-28 07:37:21,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:21,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:37:21,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398741351] [2020-11-28 07:37:21,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:21,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:21,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:21,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:21,364 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-28 07:37:22,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:22,025 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-28 07:37:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:22,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-28 07:37:22,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:22,038 INFO L225 Difference]: With dead ends: 224 [2020-11-28 07:37:22,039 INFO L226 Difference]: Without dead ends: 145 [2020-11-28 07:37:22,042 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 07:37:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-28 07:37:22,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-28 07:37:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-28 07:37:22,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 271 transitions. [2020-11-28 07:37:22,123 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 271 transitions. Word has length 71 [2020-11-28 07:37:22,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:22,125 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 271 transitions. [2020-11-28 07:37:22,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:22,126 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 271 transitions. [2020-11-28 07:37:22,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-28 07:37:22,132 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:22,132 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 07:37:22,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:37:22,133 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:22,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:22,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1350081343, now seen corresponding path program 1 times [2020-11-28 07:37:22,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:22,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852637143] [2020-11-28 07:37:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:22,234 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 07:37:22,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852637143] [2020-11-28 07:37:22,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:22,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:37:22,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270273519] [2020-11-28 07:37:22,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:22,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:22,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:22,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:22,239 INFO L87 Difference]: Start difference. First operand 145 states and 271 transitions. Second operand 3 states. [2020-11-28 07:37:22,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:22,776 INFO L93 Difference]: Finished difference Result 433 states and 811 transitions. [2020-11-28 07:37:22,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:22,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-11-28 07:37:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:22,780 INFO L225 Difference]: With dead ends: 433 [2020-11-28 07:37:22,780 INFO L226 Difference]: Without dead ends: 289 [2020-11-28 07:37:22,782 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 07:37:22,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-11-28 07:37:22,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2020-11-28 07:37:22,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-28 07:37:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 504 transitions. [2020-11-28 07:37:22,800 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 504 transitions. Word has length 76 [2020-11-28 07:37:22,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:22,800 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 504 transitions. [2020-11-28 07:37:22,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:22,801 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 504 transitions. [2020-11-28 07:37:22,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-11-28 07:37:22,806 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:22,806 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 07:37:22,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:37:22,808 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:22,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:22,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1863723950, now seen corresponding path program 1 times [2020-11-28 07:37:22,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:22,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985929714] [2020-11-28 07:37:22,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:22,923 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 07:37:22,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985929714] [2020-11-28 07:37:22,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:22,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:37:22,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520060537] [2020-11-28 07:37:22,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:37:22,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:22,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:37:22,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:37:22,929 INFO L87 Difference]: Start difference. First operand 287 states and 504 transitions. Second operand 4 states. [2020-11-28 07:37:23,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:23,750 INFO L93 Difference]: Finished difference Result 999 states and 1753 transitions. [2020-11-28 07:37:23,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:37:23,751 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-11-28 07:37:23,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:23,756 INFO L225 Difference]: With dead ends: 999 [2020-11-28 07:37:23,756 INFO L226 Difference]: Without dead ends: 713 [2020-11-28 07:37:23,758 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 07:37:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-11-28 07:37:23,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2020-11-28 07:37:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-11-28 07:37:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1106 transitions. [2020-11-28 07:37:23,805 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1106 transitions. Word has length 83 [2020-11-28 07:37:23,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:23,806 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1106 transitions. [2020-11-28 07:37:23,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:37:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1106 transitions. [2020-11-28 07:37:23,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-28 07:37:23,810 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:23,811 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 07:37:23,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:37:23,811 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:23,812 INFO L82 PathProgramCache]: Analyzing trace with hash 228747048, now seen corresponding path program 1 times [2020-11-28 07:37:23,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:23,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13174569] [2020-11-28 07:37:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:23,925 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 07:37:23,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13174569] [2020-11-28 07:37:23,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:23,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:37:23,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151799886] [2020-11-28 07:37:23,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:23,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:23,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:23,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:23,929 INFO L87 Difference]: Start difference. First operand 713 states and 1106 transitions. Second operand 3 states. [2020-11-28 07:37:24,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:24,420 INFO L93 Difference]: Finished difference Result 1780 states and 2693 transitions. [2020-11-28 07:37:24,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:24,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-11-28 07:37:24,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:24,426 INFO L225 Difference]: With dead ends: 1780 [2020-11-28 07:37:24,427 INFO L226 Difference]: Without dead ends: 1068 [2020-11-28 07:37:24,430 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 07:37:24,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2020-11-28 07:37:24,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 926. [2020-11-28 07:37:24,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-11-28 07:37:24,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1361 transitions. [2020-11-28 07:37:24,472 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1361 transitions. Word has length 86 [2020-11-28 07:37:24,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:24,474 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1361 transitions. [2020-11-28 07:37:24,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:24,474 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1361 transitions. [2020-11-28 07:37:24,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-28 07:37:24,479 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:24,479 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 07:37:24,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:37:24,479 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:24,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:24,480 INFO L82 PathProgramCache]: Analyzing trace with hash -222273252, now seen corresponding path program 1 times [2020-11-28 07:37:24,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:24,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842868305] [2020-11-28 07:37:24,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:24,583 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 07:37:24,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842868305] [2020-11-28 07:37:24,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:24,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:37:24,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990338828] [2020-11-28 07:37:24,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:24,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:24,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:24,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:24,588 INFO L87 Difference]: Start difference. First operand 926 states and 1361 transitions. Second operand 3 states. [2020-11-28 07:37:25,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:25,072 INFO L93 Difference]: Finished difference Result 2206 states and 3300 transitions. [2020-11-28 07:37:25,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:25,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-11-28 07:37:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:25,080 INFO L225 Difference]: With dead ends: 2206 [2020-11-28 07:37:25,080 INFO L226 Difference]: Without dead ends: 1210 [2020-11-28 07:37:25,082 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 07:37:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-28 07:37:25,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1068. [2020-11-28 07:37:25,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-28 07:37:25,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1378 transitions. [2020-11-28 07:37:25,111 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1378 transitions. Word has length 87 [2020-11-28 07:37:25,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:25,112 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1378 transitions. [2020-11-28 07:37:25,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:25,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1378 transitions. [2020-11-28 07:37:25,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-28 07:37:25,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:25,115 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-11-28 07:37:25,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:37:25,116 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:25,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:25,116 INFO L82 PathProgramCache]: Analyzing trace with hash 843645014, now seen corresponding path program 1 times [2020-11-28 07:37:25,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:25,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831207783] [2020-11-28 07:37:25,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 07:37:25,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831207783] [2020-11-28 07:37:25,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:25,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:37:25,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487440791] [2020-11-28 07:37:25,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:37:25,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:25,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:37:25,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:37:25,228 INFO L87 Difference]: Start difference. First operand 1068 states and 1378 transitions. Second operand 4 states. [2020-11-28 07:37:25,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:25,835 INFO L93 Difference]: Finished difference Result 2206 states and 2841 transitions. [2020-11-28 07:37:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:37:25,835 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-11-28 07:37:25,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:25,843 INFO L225 Difference]: With dead ends: 2206 [2020-11-28 07:37:25,843 INFO L226 Difference]: Without dead ends: 1139 [2020-11-28 07:37:25,845 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 07:37:25,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-28 07:37:25,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2020-11-28 07:37:25,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:37:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1394 transitions. [2020-11-28 07:37:25,885 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1394 transitions. Word has length 91 [2020-11-28 07:37:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:25,885 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1394 transitions. [2020-11-28 07:37:25,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:37:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1394 transitions. [2020-11-28 07:37:25,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-11-28 07:37:25,888 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:25,889 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:25,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:37:25,889 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:25,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1911055162, now seen corresponding path program 1 times [2020-11-28 07:37:25,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:25,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693895767] [2020-11-28 07:37:25,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-28 07:37:26,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693895767] [2020-11-28 07:37:26,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:26,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:37:26,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387227380] [2020-11-28 07:37:26,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:37:26,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:26,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:37:26,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:37:26,097 INFO L87 Difference]: Start difference. First operand 1139 states and 1394 transitions. Second operand 4 states. [2020-11-28 07:37:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:26,731 INFO L93 Difference]: Finished difference Result 2277 states and 2787 transitions. [2020-11-28 07:37:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:37:26,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2020-11-28 07:37:26,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:26,738 INFO L225 Difference]: With dead ends: 2277 [2020-11-28 07:37:26,739 INFO L226 Difference]: Without dead ends: 1139 [2020-11-28 07:37:26,742 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 07:37:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-28 07:37:26,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2020-11-28 07:37:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:37:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1373 transitions. [2020-11-28 07:37:26,774 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1373 transitions. Word has length 120 [2020-11-28 07:37:26,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:26,775 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1373 transitions. [2020-11-28 07:37:26,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:37:26,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1373 transitions. [2020-11-28 07:37:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-11-28 07:37:26,781 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:26,782 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:26,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:37:26,783 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:26,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1506076615, now seen corresponding path program 1 times [2020-11-28 07:37:26,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:26,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990536827] [2020-11-28 07:37:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-28 07:37:26,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990536827] [2020-11-28 07:37:26,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:26,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:37:26,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969377704] [2020-11-28 07:37:26,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:26,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:26,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:26,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:26,955 INFO L87 Difference]: Start difference. First operand 1139 states and 1373 transitions. Second operand 3 states. [2020-11-28 07:37:27,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:27,371 INFO L93 Difference]: Finished difference Result 2561 states and 3091 transitions. [2020-11-28 07:37:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:27,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2020-11-28 07:37:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:27,381 INFO L225 Difference]: With dead ends: 2561 [2020-11-28 07:37:27,382 INFO L226 Difference]: Without dead ends: 1423 [2020-11-28 07:37:27,386 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 07:37:27,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2020-11-28 07:37:27,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1210. [2020-11-28 07:37:27,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-11-28 07:37:27,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1460 transitions. [2020-11-28 07:37:27,424 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1460 transitions. Word has length 137 [2020-11-28 07:37:27,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:27,424 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1460 transitions. [2020-11-28 07:37:27,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:27,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1460 transitions. [2020-11-28 07:37:27,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-28 07:37:27,427 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:27,428 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:27,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:37:27,428 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:27,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:27,429 INFO L82 PathProgramCache]: Analyzing trace with hash 445246804, now seen corresponding path program 1 times [2020-11-28 07:37:27,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:27,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147472869] [2020-11-28 07:37:27,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:27,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147472869] [2020-11-28 07:37:27,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:27,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:37:27,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878299260] [2020-11-28 07:37:27,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:37:27,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:27,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:37:27,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:37:27,683 INFO L87 Difference]: Start difference. First operand 1210 states and 1460 transitions. Second operand 4 states. [2020-11-28 07:37:28,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:28,269 INFO L93 Difference]: Finished difference Result 2670 states and 3189 transitions. [2020-11-28 07:37:28,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:37:28,270 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2020-11-28 07:37:28,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:28,279 INFO L225 Difference]: With dead ends: 2670 [2020-11-28 07:37:28,279 INFO L226 Difference]: Without dead ends: 1461 [2020-11-28 07:37:28,282 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 07:37:28,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2020-11-28 07:37:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1352. [2020-11-28 07:37:28,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-11-28 07:37:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1574 transitions. [2020-11-28 07:37:28,326 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1574 transitions. Word has length 155 [2020-11-28 07:37:28,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:28,328 INFO L481 AbstractCegarLoop]: Abstraction has 1352 states and 1574 transitions. [2020-11-28 07:37:28,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:37:28,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1574 transitions. [2020-11-28 07:37:28,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-11-28 07:37:28,333 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:28,336 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:28,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:37:28,337 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:28,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:28,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2043507405, now seen corresponding path program 1 times [2020-11-28 07:37:28,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:28,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406757740] [2020-11-28 07:37:28,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 07:37:28,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406757740] [2020-11-28 07:37:28,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:28,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:37:28,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387252743] [2020-11-28 07:37:28,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:28,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:28,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:28,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:28,504 INFO L87 Difference]: Start difference. First operand 1352 states and 1574 transitions. Second operand 3 states. [2020-11-28 07:37:28,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:28,961 INFO L93 Difference]: Finished difference Result 2845 states and 3357 transitions. [2020-11-28 07:37:28,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:28,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 168 [2020-11-28 07:37:28,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:28,973 INFO L225 Difference]: With dead ends: 2845 [2020-11-28 07:37:28,973 INFO L226 Difference]: Without dead ends: 1494 [2020-11-28 07:37:28,975 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 07:37:28,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2020-11-28 07:37:29,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1494. [2020-11-28 07:37:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1494 states. [2020-11-28 07:37:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1738 transitions. [2020-11-28 07:37:29,025 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1738 transitions. Word has length 168 [2020-11-28 07:37:29,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:29,026 INFO L481 AbstractCegarLoop]: Abstraction has 1494 states and 1738 transitions. [2020-11-28 07:37:29,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:29,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1738 transitions. [2020-11-28 07:37:29,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-11-28 07:37:29,030 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:29,030 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-28 07:37:29,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 07:37:29,031 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:29,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:29,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1479947029, now seen corresponding path program 1 times [2020-11-28 07:37:29,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:29,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021973795] [2020-11-28 07:37:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-11-28 07:37:29,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021973795] [2020-11-28 07:37:29,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:29,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:37:29,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819927318] [2020-11-28 07:37:29,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:29,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:29,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:29,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:29,272 INFO L87 Difference]: Start difference. First operand 1494 states and 1738 transitions. Second operand 3 states. [2020-11-28 07:37:29,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:29,679 INFO L93 Difference]: Finished difference Result 3413 states and 3982 transitions. [2020-11-28 07:37:29,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:29,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 177 [2020-11-28 07:37:29,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:29,692 INFO L225 Difference]: With dead ends: 3413 [2020-11-28 07:37:29,692 INFO L226 Difference]: Without dead ends: 1920 [2020-11-28 07:37:29,694 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 07:37:29,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2020-11-28 07:37:29,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1068. [2020-11-28 07:37:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-28 07:37:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1273 transitions. [2020-11-28 07:37:29,737 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1273 transitions. Word has length 177 [2020-11-28 07:37:29,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:29,738 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1273 transitions. [2020-11-28 07:37:29,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:29,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1273 transitions. [2020-11-28 07:37:29,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-11-28 07:37:29,743 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:29,744 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 07:37:29,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 07:37:29,744 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:29,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:29,745 INFO L82 PathProgramCache]: Analyzing trace with hash -588452363, now seen corresponding path program 1 times [2020-11-28 07:37:29,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:29,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754158444] [2020-11-28 07:37:29,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:30,176 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 07:37:30,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754158444] [2020-11-28 07:37:30,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160933653] [2020-11-28 07:37:30,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5abdb9d4-c779-417b-a90d-1ec1a5c9406d/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 07:37:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:30,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:37:30,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:30,582 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 07:37:30,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:30,729 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 07:37:30,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:37:30,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2020-11-28 07:37:30,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825458147] [2020-11-28 07:37:30,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:30,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:30,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:30,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:37:30,732 INFO L87 Difference]: Start difference. First operand 1068 states and 1273 transitions. Second operand 3 states. [2020-11-28 07:37:31,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:31,195 INFO L93 Difference]: Finished difference Result 2348 states and 2803 transitions. [2020-11-28 07:37:31,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:31,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-11-28 07:37:31,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:31,206 INFO L225 Difference]: With dead ends: 2348 [2020-11-28 07:37:31,206 INFO L226 Difference]: Without dead ends: 1281 [2020-11-28 07:37:31,209 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 07:37:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-28 07:37:31,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1210. [2020-11-28 07:37:31,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-11-28 07:37:31,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1418 transitions. [2020-11-28 07:37:31,254 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1418 transitions. Word has length 241 [2020-11-28 07:37:31,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:31,255 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1418 transitions. [2020-11-28 07:37:31,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:31,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1418 transitions. [2020-11-28 07:37:31,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-11-28 07:37:31,262 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:31,262 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-11-28 07:37:31,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 07:37:31,476 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:31,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:31,476 INFO L82 PathProgramCache]: Analyzing trace with hash 968680822, now seen corresponding path program 1 times [2020-11-28 07:37:31,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:31,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405180693] [2020-11-28 07:37:31,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 313 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:32,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405180693] [2020-11-28 07:37:32,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128723773] [2020-11-28 07:37:32,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5abdb9d4-c779-417b-a90d-1ec1a5c9406d/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:37:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:32,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:37:32,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-11-28 07:37:32,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-11-28 07:37:32,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:37:32,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2020-11-28 07:37:32,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409027567] [2020-11-28 07:37:32,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:32,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:32,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:32,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:37:32,620 INFO L87 Difference]: Start difference. First operand 1210 states and 1418 transitions. Second operand 3 states. [2020-11-28 07:37:33,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:33,053 INFO L93 Difference]: Finished difference Result 2488 states and 2893 transitions. [2020-11-28 07:37:33,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:33,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 274 [2020-11-28 07:37:33,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:33,055 INFO L225 Difference]: With dead ends: 2488 [2020-11-28 07:37:33,055 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:37:33,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 545 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:37:33,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:37:33,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:37:33,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:37:33,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:37:33,059 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 274 [2020-11-28 07:37:33,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:33,060 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:37:33,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:33,060 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:37:33,060 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:37:33,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-28 07:37:33,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:37:33,628 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2020-11-28 07:37:33,821 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2020-11-28 07:37:33,826 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-28 07:37:33,826 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-28 07:37:33,826 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-28 07:37:33,826 INFO L274 CegarLoopResult]: For program point L566-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:37:33,826 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-28 07:37:33,826 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-28 07:37:33,826 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-28 07:37:33,826 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-28 07:37:33,827 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-28 07:37:33,827 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-28 07:37:33,827 INFO L274 CegarLoopResult]: For program point L569-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:37:33,827 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-28 07:37:33,827 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-28 07:37:33,827 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-28 07:37:33,827 INFO L274 CegarLoopResult]: For program point L570(line 570) no Hoare annotation was computed. [2020-11-28 07:37:33,827 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-28 07:37:33,827 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-28 07:37:33,827 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-28 07:37:33,827 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-28 07:37:33,828 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-28 07:37:33,828 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-28 07:37:33,828 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-28 07:37:33,828 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-28 07:37:33,828 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-28 07:37:33,828 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-28 07:37:33,828 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-28 07:37:33,828 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-28 07:37:33,828 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-28 07:37:33,828 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-28 07:37:33,828 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-28 07:37:33,829 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-28 07:37:33,829 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-28 07:37:33,829 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-28 07:37:33,829 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-28 07:37:33,829 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-28 07:37:33,829 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-28 07:37:33,829 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-28 07:37:33,829 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-28 07:37:33,829 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-28 07:37:33,829 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:37:33,829 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-28 07:37:33,829 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-28 07:37:33,830 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-28 07:37:33,830 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse4 (= ~a20~0 1))) (let ((.cse2 (= ~a16~0 6)) (.cse1 (not .cse4)) (.cse0 (<= ~a16~0 5)) (.cse3 (<= ~a21~0 0))) (or (and .cse0 (not (= ~a7~0 1)) .cse1) (and .cse2 .cse3) (and (<= ~a16~0 4) .cse4 (= ~a17~0 1)) (and .cse2 .cse1 (<= 15 ~a8~0)) (and (= ~a21~0 1) .cse4) (and (<= 14 ~a8~0) .cse0 .cse1) (and .cse0 .cse3)))) [2020-11-28 07:37:33,830 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-28 07:37:33,830 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-28 07:37:33,830 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-28 07:37:33,830 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-28 07:37:33,831 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-28 07:37:33,831 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-28 07:37:33,831 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-28 07:37:33,831 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:37:33,831 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-28 07:37:33,831 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-28 07:37:33,831 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-28 07:37:33,835 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-28 07:37:33,835 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-28 07:37:33,836 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-28 07:37:33,836 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-28 07:37:33,836 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-28 07:37:33,836 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-28 07:37:33,836 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-28 07:37:33,836 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-28 07:37:33,837 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-28 07:37:33,837 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-28 07:37:33,837 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-28 07:37:33,837 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-28 07:37:33,837 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse4 (= ~a20~0 1))) (let ((.cse2 (= ~a16~0 6)) (.cse1 (not .cse4)) (.cse0 (<= ~a16~0 5)) (.cse3 (<= ~a21~0 0))) (or (and .cse0 (not (= ~a7~0 1)) .cse1) (and .cse2 .cse3) (and (<= ~a16~0 4) .cse4 (= ~a17~0 1)) (and .cse2 .cse1 (<= 15 ~a8~0)) (and (= ~a21~0 1) .cse4) (and (<= 14 ~a8~0) .cse0 .cse1) (and .cse0 .cse3)))) [2020-11-28 07:37:33,837 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-28 07:37:33,838 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:37:33,838 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-28 07:37:33,838 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-28 07:37:33,838 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-28 07:37:33,838 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-28 07:37:33,839 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-28 07:37:33,839 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-28 07:37:33,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:37:33 BoogieIcfgContainer [2020-11-28 07:37:33,882 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:37:33,883 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:37:33,883 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:37:33,884 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:37:33,884 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:37:20" (3/4) ... [2020-11-28 07:37:33,888 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:37:33,931 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2020-11-28 07:37:33,936 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-11-28 07:37:33,938 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-28 07:37:33,940 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-28 07:37:34,137 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5abdb9d4-c779-417b-a90d-1ec1a5c9406d/bin/utaipan/witness.graphml [2020-11-28 07:37:34,137 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:37:34,138 INFO L168 Benchmark]: Toolchain (without parser) took 16908.03 ms. Allocated memory was 96.5 MB in the beginning and 406.8 MB in the end (delta: 310.4 MB). Free memory was 65.0 MB in the beginning and 363.3 MB in the end (delta: -298.2 MB). Peak memory consumption was 223.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:34,138 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 77.6 MB. Free memory was 34.5 MB in the beginning and 34.4 MB in the end (delta: 40.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:37:34,139 INFO L168 Benchmark]: CACSL2BoogieTranslator took 659.56 ms. Allocated memory is still 96.5 MB. Free memory was 65.0 MB in the beginning and 56.8 MB in the end (delta: 8.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:34,139 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.48 ms. Allocated memory is still 96.5 MB. Free memory was 56.8 MB in the beginning and 51.5 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:34,139 INFO L168 Benchmark]: Boogie Preprocessor took 124.73 ms. Allocated memory is still 96.5 MB. Free memory was 51.5 MB in the beginning and 46.8 MB in the end (delta: 4.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:34,140 INFO L168 Benchmark]: RCFGBuilder took 2624.83 ms. Allocated memory was 96.5 MB in the beginning and 119.5 MB in the end (delta: 23.1 MB). Free memory was 46.8 MB in the beginning and 59.1 MB in the end (delta: -12.3 MB). Peak memory consumption was 34.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:34,140 INFO L168 Benchmark]: TraceAbstraction took 13163.83 ms. Allocated memory was 119.5 MB in the beginning and 406.8 MB in the end (delta: 287.3 MB). Free memory was 59.1 MB in the beginning and 161.1 MB in the end (delta: -102.0 MB). Peak memory consumption was 186.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:34,141 INFO L168 Benchmark]: Witness Printer took 254.03 ms. Allocated memory is still 406.8 MB. Free memory was 161.1 MB in the beginning and 363.3 MB in the end (delta: -202.2 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:34,143 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 77.6 MB. Free memory was 34.5 MB in the beginning and 34.4 MB in the end (delta: 40.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 659.56 ms. Allocated memory is still 96.5 MB. Free memory was 65.0 MB in the beginning and 56.8 MB in the end (delta: 8.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.48 ms. Allocated memory is still 96.5 MB. Free memory was 56.8 MB in the beginning and 51.5 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 124.73 ms. Allocated memory is still 96.5 MB. Free memory was 51.5 MB in the beginning and 46.8 MB in the end (delta: 4.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2624.83 ms. Allocated memory was 96.5 MB in the beginning and 119.5 MB in the end (delta: 23.1 MB). Free memory was 46.8 MB in the beginning and 59.1 MB in the end (delta: -12.3 MB). Peak memory consumption was 34.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13163.83 ms. Allocated memory was 119.5 MB in the beginning and 406.8 MB in the end (delta: 287.3 MB). Free memory was 59.1 MB in the beginning and 161.1 MB in the end (delta: -102.0 MB). Peak memory consumption was 186.3 MB. Max. memory is 16.1 GB. * Witness Printer took 254.03 ms. Allocated memory is still 406.8 MB. Free memory was 161.1 MB in the beginning and 363.3 MB in the end (delta: -202.2 MB). Peak memory consumption was 8.5 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 && !(a7 == 1)) && !(a20 == 1)) || (a16 == 6 && a21 <= 0)) || ((a16 <= 4 && a20 == 1) && a17 == 1)) || ((a16 == 6 && !(a20 == 1)) && 15 <= a8)) || (a21 == 1 && a20 == 1)) || ((14 <= a8 && a16 <= 5) && !(a20 == 1))) || (a16 <= 5 && a21 <= 0) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: (((((((a16 <= 5 && !(a7 == 1)) && !(a20 == 1)) || (a16 == 6 && a21 <= 0)) || ((a16 <= 4 && a20 == 1) && a17 == 1)) || ((a16 == 6 && !(a20 == 1)) && 15 <= a8)) || (a21 == 1 && a20 == 1)) || ((14 <= a8 && a16 <= 5) && !(a20 == 1))) || (a16 <= 5 && a21 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.4s, OverallIterations: 13, TraceHistogramMax: 7, AutomataDifference: 7.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 626 SDtfs, 1036 SDslu, 60 SDs, 0 SdLazy, 2988 SolverSat, 771 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1069 GetRequests, 1040 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1494occurred in iteration=10, 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, 1531 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 43 NumberOfFragments, 133 HoareAnnotationTreeSize, 3 FomulaSimplifications, 4792 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 784 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 2281 NumberOfCodeBlocks, 2281 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 2779 ConstructedInterpolants, 0 QuantifiedInterpolants, 2050286 SizeOfPredicates, 2 NumberOfNonLiveVariables, 1117 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 17 InterpolantComputations, 15 PerfectInterpolantSequences, 2953/3226 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...