./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label11.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_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label11.c -s /tmp/vcloud-vcloud-master/worker/run_dir_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/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 6691501f936812008ae2aab4b0a1a1ac8b067e57 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 07:41:24,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:41:24,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:41:24,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:41:24,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:41:24,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:41:24,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:41:24,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:41:24,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:41:24,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:41:24,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:41:24,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:41:24,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:41:24,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:41:24,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:41:24,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:41:24,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:41:24,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:41:24,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:41:24,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:41:24,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:41:24,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:41:24,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:41:24,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:41:24,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:41:24,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:41:24,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:41:24,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:41:24,606 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:41:24,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:41:24,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:41:24,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:41:24,609 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:41:24,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:41:24,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:41:24,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:41:24,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:41:24,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:41:24,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:41:24,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:41:24,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:41:24,621 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:41:24,665 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:41:24,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:41:24,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:41:24,667 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:41:24,667 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:41:24,667 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:41:24,668 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:41:24,668 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:41:24,668 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:41:24,669 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:41:24,669 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:41:24,669 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:41:24,669 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:41:24,670 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:41:24,670 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:41:24,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:41:24,671 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:41:24,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:41:24,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:41:24,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:41:24,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:41:24,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:41:24,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:41:24,673 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:41:24,674 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:41:24,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:41:24,674 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:41:24,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:41:24,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:41:24,675 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:41:24,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:41:24,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:41:24,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:41:24,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:41:24,677 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:41:24,677 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:41:24,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:41:24,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:41:24,678 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:41:24,678 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:41:24,678 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_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6691501f936812008ae2aab4b0a1a1ac8b067e57 [2020-11-28 07:41:25,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:41:25,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:41:25,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:41:25,104 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:41:25,106 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:41:25,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label11.c [2020-11-28 07:41:25,201 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/bin/utaipan/data/6e2467194/b86cecc8bce14a8087b7cfc385af5c72/FLAGebdb48708 [2020-11-28 07:41:25,906 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:41:25,906 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/sv-benchmarks/c/eca-rers2012/Problem01_label11.c [2020-11-28 07:41:25,927 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/bin/utaipan/data/6e2467194/b86cecc8bce14a8087b7cfc385af5c72/FLAGebdb48708 [2020-11-28 07:41:26,140 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/bin/utaipan/data/6e2467194/b86cecc8bce14a8087b7cfc385af5c72 [2020-11-28 07:41:26,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:41:26,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:41:26,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:26,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:41:26,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:41:26,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:26" (1/1) ... [2020-11-28 07:41:26,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65b452c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:26, skipping insertion in model container [2020-11-28 07:41:26,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:26" (1/1) ... [2020-11-28 07:41:26,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:41:26,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:41:26,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:26,690 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:41:26,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:26,857 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:41:26,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:26 WrapperNode [2020-11-28 07:41:26,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:26,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:26,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:41:26,860 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:41:26,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:26" (1/1) ... [2020-11-28 07:41:26,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:26" (1/1) ... [2020-11-28 07:41:26,971 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:26,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:41:26,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:41:26,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:41:26,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:26" (1/1) ... [2020-11-28 07:41:26,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:26" (1/1) ... [2020-11-28 07:41:26,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:26" (1/1) ... [2020-11-28 07:41:27,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:26" (1/1) ... [2020-11-28 07:41:27,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:26" (1/1) ... [2020-11-28 07:41:27,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:26" (1/1) ... [2020-11-28 07:41:27,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:26" (1/1) ... [2020-11-28 07:41:27,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:41:27,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:41:27,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:41:27,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:41:27,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/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 07:41:27,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:41:27,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:41:27,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:41:27,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:41:29,737 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:41:29,738 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:41:29,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:29 BoogieIcfgContainer [2020-11-28 07:41:29,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:41:29,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:41:29,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:41:29,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:41:29,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:41:26" (1/3) ... [2020-11-28 07:41:29,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6404b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:29, skipping insertion in model container [2020-11-28 07:41:29,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:26" (2/3) ... [2020-11-28 07:41:29,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6404b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:29, skipping insertion in model container [2020-11-28 07:41:29,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:29" (3/3) ... [2020-11-28 07:41:29,750 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label11.c [2020-11-28 07:41:29,762 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:41:29,766 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:41:29,778 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:41:29,814 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:41:29,814 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:41:29,814 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:41:29,814 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:41:29,814 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:41:29,815 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:41:29,815 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:41:29,815 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:41:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-28 07:41:29,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-28 07:41:29,850 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:29,851 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 07:41:29,853 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:29,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:29,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1520709741, now seen corresponding path program 1 times [2020-11-28 07:41:29,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:29,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769976412] [2020-11-28 07:41:29,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:30,372 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 07:41:30,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769976412] [2020-11-28 07:41:30,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:30,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:41:30,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727950489] [2020-11-28 07:41:30,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:30,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:30,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:30,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:30,399 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-28 07:41:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:31,070 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-28 07:41:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:31,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-28 07:41:31,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:31,104 INFO L225 Difference]: With dead ends: 224 [2020-11-28 07:41:31,104 INFO L226 Difference]: Without dead ends: 145 [2020-11-28 07:41:31,107 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 07:41:31,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-28 07:41:31,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-28 07:41:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-28 07:41:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 265 transitions. [2020-11-28 07:41:31,184 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 265 transitions. Word has length 71 [2020-11-28 07:41:31,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:31,186 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 265 transitions. [2020-11-28 07:41:31,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:31,186 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 265 transitions. [2020-11-28 07:41:31,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-28 07:41:31,192 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:31,193 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:31,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:41:31,193 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:31,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:31,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1975136446, now seen corresponding path program 1 times [2020-11-28 07:41:31,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:31,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799413093] [2020-11-28 07:41:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:31,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799413093] [2020-11-28 07:41:31,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:31,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:41:31,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811956994] [2020-11-28 07:41:31,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:31,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:31,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:31,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:31,259 INFO L87 Difference]: Start difference. First operand 145 states and 265 transitions. Second operand 3 states. [2020-11-28 07:41:31,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:31,860 INFO L93 Difference]: Finished difference Result 431 states and 792 transitions. [2020-11-28 07:41:31,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:31,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-11-28 07:41:31,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:31,864 INFO L225 Difference]: With dead ends: 431 [2020-11-28 07:41:31,864 INFO L226 Difference]: Without dead ends: 287 [2020-11-28 07:41:31,866 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 07:41:31,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-28 07:41:31,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-11-28 07:41:31,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-28 07:41:31,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 486 transitions. [2020-11-28 07:41:31,905 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 486 transitions. Word has length 77 [2020-11-28 07:41:31,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:31,905 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 486 transitions. [2020-11-28 07:41:31,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:31,906 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 486 transitions. [2020-11-28 07:41:31,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-28 07:41:31,909 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:31,909 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:31,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:41:31,909 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:31,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:31,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1832089028, now seen corresponding path program 1 times [2020-11-28 07:41:31,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:31,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467875136] [2020-11-28 07:41:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:32,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467875136] [2020-11-28 07:41:32,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:32,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:32,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60760686] [2020-11-28 07:41:32,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:32,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:32,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:32,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:32,214 INFO L87 Difference]: Start difference. First operand 287 states and 486 transitions. Second operand 4 states. [2020-11-28 07:41:33,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:33,014 INFO L93 Difference]: Finished difference Result 784 states and 1303 transitions. [2020-11-28 07:41:33,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:33,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-11-28 07:41:33,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:33,019 INFO L225 Difference]: With dead ends: 784 [2020-11-28 07:41:33,019 INFO L226 Difference]: Without dead ends: 429 [2020-11-28 07:41:33,025 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 07:41:33,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-11-28 07:41:33,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2020-11-28 07:41:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-11-28 07:41:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 587 transitions. [2020-11-28 07:41:33,051 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 587 transitions. Word has length 78 [2020-11-28 07:41:33,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:33,051 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 587 transitions. [2020-11-28 07:41:33,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:33,052 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 587 transitions. [2020-11-28 07:41:33,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-11-28 07:41:33,055 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:33,055 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:33,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:41:33,056 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:33,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:33,056 INFO L82 PathProgramCache]: Analyzing trace with hash 102969367, now seen corresponding path program 1 times [2020-11-28 07:41:33,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:33,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116930201] [2020-11-28 07:41:33,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:33,123 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 07:41:33,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116930201] [2020-11-28 07:41:33,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:33,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:33,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234671888] [2020-11-28 07:41:33,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:33,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:33,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:33,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:33,125 INFO L87 Difference]: Start difference. First operand 429 states and 587 transitions. Second operand 4 states. [2020-11-28 07:41:33,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:33,811 INFO L93 Difference]: Finished difference Result 1212 states and 1727 transitions. [2020-11-28 07:41:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:33,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-11-28 07:41:33,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:33,816 INFO L225 Difference]: With dead ends: 1212 [2020-11-28 07:41:33,816 INFO L226 Difference]: Without dead ends: 784 [2020-11-28 07:41:33,818 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 07:41:33,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2020-11-28 07:41:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 571. [2020-11-28 07:41:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-28 07:41:33,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 806 transitions. [2020-11-28 07:41:33,877 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 806 transitions. Word has length 83 [2020-11-28 07:41:33,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:33,878 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 806 transitions. [2020-11-28 07:41:33,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:33,878 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 806 transitions. [2020-11-28 07:41:33,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-28 07:41:33,885 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:33,885 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:41:33,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:41:33,886 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:33,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:33,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1996679517, now seen corresponding path program 1 times [2020-11-28 07:41:33,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:33,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939413180] [2020-11-28 07:41:33,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-28 07:41:33,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939413180] [2020-11-28 07:41:33,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:33,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:33,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409318166] [2020-11-28 07:41:33,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:33,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:33,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:33,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:33,959 INFO L87 Difference]: Start difference. First operand 571 states and 806 transitions. Second operand 3 states. [2020-11-28 07:41:34,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:34,380 INFO L93 Difference]: Finished difference Result 1425 states and 1982 transitions. [2020-11-28 07:41:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:34,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-11-28 07:41:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:34,386 INFO L225 Difference]: With dead ends: 1425 [2020-11-28 07:41:34,386 INFO L226 Difference]: Without dead ends: 855 [2020-11-28 07:41:34,387 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 07:41:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2020-11-28 07:41:34,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 713. [2020-11-28 07:41:34,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-11-28 07:41:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 997 transitions. [2020-11-28 07:41:34,412 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 997 transitions. Word has length 97 [2020-11-28 07:41:34,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:34,413 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 997 transitions. [2020-11-28 07:41:34,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:34,413 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 997 transitions. [2020-11-28 07:41:34,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-11-28 07:41:34,415 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:34,416 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-28 07:41:34,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:41:34,416 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:34,417 INFO L82 PathProgramCache]: Analyzing trace with hash -929945588, now seen corresponding path program 1 times [2020-11-28 07:41:34,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:34,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386266444] [2020-11-28 07:41:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-28 07:41:34,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386266444] [2020-11-28 07:41:34,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:34,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:34,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119598670] [2020-11-28 07:41:34,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:34,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:34,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:34,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:34,543 INFO L87 Difference]: Start difference. First operand 713 states and 997 transitions. Second operand 4 states. [2020-11-28 07:41:35,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:35,258 INFO L93 Difference]: Finished difference Result 1638 states and 2251 transitions. [2020-11-28 07:41:35,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:35,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-11-28 07:41:35,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:35,264 INFO L225 Difference]: With dead ends: 1638 [2020-11-28 07:41:35,264 INFO L226 Difference]: Without dead ends: 926 [2020-11-28 07:41:35,265 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 07:41:35,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-28 07:41:35,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 855. [2020-11-28 07:41:35,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855 states. [2020-11-28 07:41:35,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1157 transitions. [2020-11-28 07:41:35,308 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1157 transitions. Word has length 103 [2020-11-28 07:41:35,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:35,310 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 1157 transitions. [2020-11-28 07:41:35,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:35,317 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1157 transitions. [2020-11-28 07:41:35,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-28 07:41:35,320 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:35,320 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:35,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:41:35,321 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:35,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:35,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1439708887, now seen corresponding path program 1 times [2020-11-28 07:41:35,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:35,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420357640] [2020-11-28 07:41:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-28 07:41:35,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420357640] [2020-11-28 07:41:35,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:35,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:41:35,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93086262] [2020-11-28 07:41:35,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:35,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:35,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:35,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:35,455 INFO L87 Difference]: Start difference. First operand 855 states and 1157 transitions. Second operand 3 states. [2020-11-28 07:41:35,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:35,904 INFO L93 Difference]: Finished difference Result 1851 states and 2519 transitions. [2020-11-28 07:41:35,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:35,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-11-28 07:41:35,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:35,911 INFO L225 Difference]: With dead ends: 1851 [2020-11-28 07:41:35,911 INFO L226 Difference]: Without dead ends: 997 [2020-11-28 07:41:35,912 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 07:41:35,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-11-28 07:41:35,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2020-11-28 07:41:35,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-11-28 07:41:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1315 transitions. [2020-11-28 07:41:35,951 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1315 transitions. Word has length 121 [2020-11-28 07:41:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:35,952 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1315 transitions. [2020-11-28 07:41:35,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:35,952 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1315 transitions. [2020-11-28 07:41:35,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-28 07:41:35,957 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:35,957 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-11-28 07:41:35,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:41:35,958 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:35,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:35,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1455234374, now seen corresponding path program 1 times [2020-11-28 07:41:35,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:35,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294669771] [2020-11-28 07:41:35,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:36,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294669771] [2020-11-28 07:41:36,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:36,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:41:36,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546018020] [2020-11-28 07:41:36,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:41:36,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:36,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:41:36,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:41:36,295 INFO L87 Difference]: Start difference. First operand 997 states and 1315 transitions. Second operand 5 states. [2020-11-28 07:41:37,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:37,163 INFO L93 Difference]: Finished difference Result 2490 states and 3243 transitions. [2020-11-28 07:41:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:41:37,164 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2020-11-28 07:41:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:37,172 INFO L225 Difference]: With dead ends: 2490 [2020-11-28 07:41:37,173 INFO L226 Difference]: Without dead ends: 1494 [2020-11-28 07:41:37,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:41:37,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2020-11-28 07:41:37,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1139. [2020-11-28 07:41:37,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:41:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1477 transitions. [2020-11-28 07:41:37,211 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1477 transitions. Word has length 130 [2020-11-28 07:41:37,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:37,213 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1477 transitions. [2020-11-28 07:41:37,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:41:37,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1477 transitions. [2020-11-28 07:41:37,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-11-28 07:41:37,216 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:37,217 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-11-28 07:41:37,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:41:37,217 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:37,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:37,217 INFO L82 PathProgramCache]: Analyzing trace with hash -604144414, now seen corresponding path program 1 times [2020-11-28 07:41:37,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:37,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407294493] [2020-11-28 07:41:37,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:37,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407294493] [2020-11-28 07:41:37,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951981160] [2020-11-28 07:41:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/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 07:41:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:37,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:41:37,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-28 07:41:37,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-28 07:41:37,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:41:37,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-11-28 07:41:37,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906612146] [2020-11-28 07:41:37,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:37,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:37,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:37,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:41:37,849 INFO L87 Difference]: Start difference. First operand 1139 states and 1477 transitions. Second operand 3 states. [2020-11-28 07:41:38,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:38,304 INFO L93 Difference]: Finished difference Result 2916 states and 3798 transitions. [2020-11-28 07:41:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:38,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2020-11-28 07:41:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:38,316 INFO L225 Difference]: With dead ends: 2916 [2020-11-28 07:41:38,316 INFO L226 Difference]: Without dead ends: 1778 [2020-11-28 07:41:38,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:41:38,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2020-11-28 07:41:38,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1636. [2020-11-28 07:41:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2020-11-28 07:41:38,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 2071 transitions. [2020-11-28 07:41:38,383 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 2071 transitions. Word has length 134 [2020-11-28 07:41:38,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:38,384 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 2071 transitions. [2020-11-28 07:41:38,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:38,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 2071 transitions. [2020-11-28 07:41:38,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-11-28 07:41:38,389 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:38,390 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:38,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-28 07:41:38,618 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:38,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:38,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1531684113, now seen corresponding path program 1 times [2020-11-28 07:41:38,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:38,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434455577] [2020-11-28 07:41:38,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-11-28 07:41:38,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434455577] [2020-11-28 07:41:38,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:38,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:38,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654285186] [2020-11-28 07:41:38,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:38,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:38,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:38,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:38,794 INFO L87 Difference]: Start difference. First operand 1636 states and 2071 transitions. Second operand 3 states. [2020-11-28 07:41:39,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:39,243 INFO L93 Difference]: Finished difference Result 3626 states and 4598 transitions. [2020-11-28 07:41:39,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:39,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 189 [2020-11-28 07:41:39,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:39,254 INFO L225 Difference]: With dead ends: 3626 [2020-11-28 07:41:39,254 INFO L226 Difference]: Without dead ends: 1991 [2020-11-28 07:41:39,257 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 07:41:39,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2020-11-28 07:41:39,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1778. [2020-11-28 07:41:39,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1778 states. [2020-11-28 07:41:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2238 transitions. [2020-11-28 07:41:39,309 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2238 transitions. Word has length 189 [2020-11-28 07:41:39,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:39,310 INFO L481 AbstractCegarLoop]: Abstraction has 1778 states and 2238 transitions. [2020-11-28 07:41:39,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:39,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2238 transitions. [2020-11-28 07:41:39,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-11-28 07:41:39,316 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:39,317 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 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, 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 07:41:39,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 07:41:39,317 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:39,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1444201074, now seen corresponding path program 1 times [2020-11-28 07:41:39,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:39,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242648182] [2020-11-28 07:41:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 304 proven. 77 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-11-28 07:41:39,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242648182] [2020-11-28 07:41:39,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865114776] [2020-11-28 07:41:39,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/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 07:41:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:39,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:41:39,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-28 07:41:40,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-28 07:41:40,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:41:40,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-11-28 07:41:40,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958245542] [2020-11-28 07:41:40,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:40,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:40,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:40,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:41:40,120 INFO L87 Difference]: Start difference. First operand 1778 states and 2238 transitions. Second operand 4 states. [2020-11-28 07:41:40,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:40,799 INFO L93 Difference]: Finished difference Result 4194 states and 5254 transitions. [2020-11-28 07:41:40,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:40,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 254 [2020-11-28 07:41:40,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:40,813 INFO L225 Difference]: With dead ends: 4194 [2020-11-28 07:41:40,813 INFO L226 Difference]: Without dead ends: 2417 [2020-11-28 07:41:40,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:41:40,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2020-11-28 07:41:40,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1210. [2020-11-28 07:41:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-11-28 07:41:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1504 transitions. [2020-11-28 07:41:40,859 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1504 transitions. Word has length 254 [2020-11-28 07:41:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:40,860 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1504 transitions. [2020-11-28 07:41:40,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1504 transitions. [2020-11-28 07:41:40,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-11-28 07:41:40,866 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:40,866 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 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, 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 07:41:41,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:41,082 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:41,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:41,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1300902658, now seen corresponding path program 1 times [2020-11-28 07:41:41,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:41,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715664170] [2020-11-28 07:41:41,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 342 proven. 110 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-28 07:41:41,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715664170] [2020-11-28 07:41:41,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722436410] [2020-11-28 07:41:41,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:41,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:41:41,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-11-28 07:41:41,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-11-28 07:41:41,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:41:41,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2020-11-28 07:41:41,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114017992] [2020-11-28 07:41:41,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:41,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:41,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:41,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:41:41,896 INFO L87 Difference]: Start difference. First operand 1210 states and 1504 transitions. Second operand 3 states. [2020-11-28 07:41:42,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:42,313 INFO L93 Difference]: Finished difference Result 2417 states and 3006 transitions. [2020-11-28 07:41:42,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:42,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 263 [2020-11-28 07:41:42,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:42,315 INFO L225 Difference]: With dead ends: 2417 [2020-11-28 07:41:42,315 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:41:42,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 524 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:41:42,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:41:42,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:41:42,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:41:42,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:41:42,319 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 263 [2020-11-28 07:41:42,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:42,319 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:41:42,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:42,319 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:41:42,319 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:41:42,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 07:41:42,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:41:42,644 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 64 [2020-11-28 07:41:42,959 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2020-11-28 07:41:43,186 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2020-11-28 07:41:43,191 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-28 07:41:43,191 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-28 07:41:43,192 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-28 07:41:43,192 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-28 07:41:43,192 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-28 07:41:43,192 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-28 07:41:43,192 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-28 07:41:43,192 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-28 07:41:43,192 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-28 07:41:43,192 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-28 07:41:43,192 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-28 07:41:43,192 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-28 07:41:43,192 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-28 07:41:43,193 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-28 07:41:43,193 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-28 07:41:43,193 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-28 07:41:43,193 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-28 07:41:43,193 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-28 07:41:43,193 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-28 07:41:43,193 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-28 07:41:43,193 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-28 07:41:43,193 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-28 07:41:43,193 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-28 07:41:43,194 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-28 07:41:43,195 INFO L274 CegarLoopResult]: For program point L509-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:41:43,195 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-28 07:41:43,195 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-28 07:41:43,195 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-28 07:41:43,195 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-28 07:41:43,195 INFO L274 CegarLoopResult]: For program point L512-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:41:43,195 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-28 07:41:43,196 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-28 07:41:43,196 INFO L274 CegarLoopResult]: For program point L513(line 513) no Hoare annotation was computed. [2020-11-28 07:41:43,196 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-28 07:41:43,196 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-28 07:41:43,196 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-28 07:41:43,196 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-28 07:41:43,196 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-28 07:41:43,196 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-28 07:41:43,196 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:41:43,196 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-28 07:41:43,196 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-28 07:41:43,197 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-28 07:41:43,197 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse1 (<= ~a16~0 5)) (.cse0 (<= ~a20~0 0)) (.cse2 (= ~a21~0 1)) (.cse3 (= ~a20~0 1))) (or (and (<= 15 ~a8~0) .cse0) (and .cse1 (= ~a17~0 1) .cse0) (and (< 13 ~a8~0) .cse1 .cse0) (and .cse1 (not (= ~a7~0 1)) .cse0) (and .cse2 .cse3 (<= 5 ~a16~0)) (and (not (= 14 ~a8~0)) .cse3) (and .cse2 (<= ~a7~0 0) .cse3))) [2020-11-28 07:41:43,197 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-28 07:41:43,197 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-28 07:41:43,197 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-28 07:41:43,197 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-28 07:41:43,198 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-28 07:41:43,198 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-28 07:41:43,198 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-28 07:41:43,198 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:41:43,198 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-28 07:41:43,198 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-28 07:41:43,198 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-28 07:41:43,198 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-28 07:41:43,198 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-28 07:41:43,198 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-28 07:41:43,199 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-28 07:41:43,199 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-28 07:41:43,199 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-28 07:41:43,199 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-28 07:41:43,199 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-28 07:41:43,199 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-28 07:41:43,199 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-28 07:41:43,199 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-28 07:41:43,199 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-28 07:41:43,201 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse1 (<= ~a16~0 5)) (.cse0 (<= ~a20~0 0)) (.cse2 (= ~a21~0 1)) (.cse3 (= ~a20~0 1))) (or (and (<= 15 ~a8~0) .cse0) (and .cse1 (= ~a17~0 1) .cse0) (and (< 13 ~a8~0) .cse1 .cse0) (and .cse1 (not (= ~a7~0 1)) .cse0) (and .cse2 .cse3 (<= 5 ~a16~0)) (and (not (= 14 ~a8~0)) .cse3) (and .cse2 (<= ~a7~0 0) .cse3))) [2020-11-28 07:41:43,201 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-28 07:41:43,201 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:41:43,201 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-28 07:41:43,201 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-28 07:41:43,201 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-28 07:41:43,202 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-28 07:41:43,202 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-28 07:41:43,202 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-28 07:41:43,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:41:43 BoogieIcfgContainer [2020-11-28 07:41:43,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:41:43,241 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:41:43,241 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:41:43,241 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:41:43,242 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:29" (3/4) ... [2020-11-28 07:41:43,245 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:41:43,274 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2020-11-28 07:41:43,276 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-11-28 07:41:43,278 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-28 07:41:43,280 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-28 07:41:43,445 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_eb24f601-d1c6-4d9c-a421-6e28be4d91a6/bin/utaipan/witness.graphml [2020-11-28 07:41:43,446 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:41:43,447 INFO L168 Benchmark]: Toolchain (without parser) took 17291.60 ms. Allocated memory was 121.6 MB in the beginning and 469.8 MB in the end (delta: 348.1 MB). Free memory was 78.4 MB in the beginning and 274.2 MB in the end (delta: -195.8 MB). Peak memory consumption was 152.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:43,447 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 121.6 MB. Free memory is still 97.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:43,447 INFO L168 Benchmark]: CACSL2BoogieTranslator took 699.28 ms. Allocated memory is still 121.6 MB. Free memory was 78.1 MB in the beginning and 51.4 MB in the end (delta: 26.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:43,448 INFO L168 Benchmark]: Boogie Procedure Inliner took 112.90 ms. Allocated memory is still 121.6 MB. Free memory was 51.4 MB in the beginning and 45.7 MB in the end (delta: 5.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:43,449 INFO L168 Benchmark]: Boogie Preprocessor took 113.06 ms. Allocated memory is still 121.6 MB. Free memory was 45.7 MB in the beginning and 41.3 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:43,449 INFO L168 Benchmark]: RCFGBuilder took 2624.13 ms. Allocated memory was 121.6 MB in the beginning and 176.2 MB in the end (delta: 54.5 MB). Free memory was 96.6 MB in the beginning and 97.5 MB in the end (delta: -908.1 kB). Peak memory consumption was 79.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:43,449 INFO L168 Benchmark]: TraceAbstraction took 13498.98 ms. Allocated memory was 176.2 MB in the beginning and 469.8 MB in the end (delta: 293.6 MB). Free memory was 96.5 MB in the beginning and 290.0 MB in the end (delta: -193.5 MB). Peak memory consumption was 100.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:43,450 INFO L168 Benchmark]: Witness Printer took 204.55 ms. Allocated memory is still 469.8 MB. Free memory was 290.0 MB in the beginning and 274.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:43,452 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 121.6 MB. Free memory is still 97.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 699.28 ms. Allocated memory is still 121.6 MB. Free memory was 78.1 MB in the beginning and 51.4 MB in the end (delta: 26.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 112.90 ms. Allocated memory is still 121.6 MB. Free memory was 51.4 MB in the beginning and 45.7 MB in the end (delta: 5.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 113.06 ms. Allocated memory is still 121.6 MB. Free memory was 45.7 MB in the beginning and 41.3 MB in the end (delta: 4.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2624.13 ms. Allocated memory was 121.6 MB in the beginning and 176.2 MB in the end (delta: 54.5 MB). Free memory was 96.6 MB in the beginning and 97.5 MB in the end (delta: -908.1 kB). Peak memory consumption was 79.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13498.98 ms. Allocated memory was 176.2 MB in the beginning and 469.8 MB in the end (delta: 293.6 MB). Free memory was 96.5 MB in the beginning and 290.0 MB in the end (delta: -193.5 MB). Peak memory consumption was 100.1 MB. Max. memory is 16.1 GB. * Witness Printer took 204.55 ms. Allocated memory is still 469.8 MB. Free memory was 290.0 MB in the beginning and 274.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((15 <= a8 && a20 <= 0) || ((a16 <= 5 && a17 == 1) && a20 <= 0)) || ((13 < a8 && a16 <= 5) && a20 <= 0)) || ((a16 <= 5 && !(a7 == 1)) && a20 <= 0)) || ((a21 == 1 && a20 == 1) && 5 <= a16)) || (!(14 == a8) && a20 == 1)) || ((a21 == 1 && a7 <= 0) && a20 == 1) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((15 <= a8 && a20 <= 0) || ((a16 <= 5 && a17 == 1) && a20 <= 0)) || ((13 < a8 && a16 <= 5) && a20 <= 0)) || ((a16 <= 5 && !(a7 == 1)) && a20 <= 0)) || ((a21 == 1 && a20 == 1) && 5 <= a16)) || (!(14 == a8) && a20 == 1)) || ((a21 == 1 && a7 <= 0) && a20 == 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.7s, OverallIterations: 12, TraceHistogramMax: 7, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 474 SDtfs, 1011 SDslu, 68 SDs, 0 SdLazy, 3076 SolverSat, 689 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1337 GetRequests, 1308 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1778occurred 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, 12 MinimizatonAttempts, 2343 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 41 NumberOfFragments, 135 HoareAnnotationTreeSize, 3 FomulaSimplifications, 9032 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 558 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 2251 NumberOfCodeBlocks, 2251 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 2884 ConstructedInterpolants, 0 QuantifiedInterpolants, 1743574 SizeOfPredicates, 2 NumberOfNonLiveVariables, 1472 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 18 InterpolantComputations, 15 PerfectInterpolantSequences, 3278/3478 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...