./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_4.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_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1f0612232c1c27f632e5ebc1ac9944571433fe3b .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 23:59:14,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:59:14,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:59:14,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:59:14,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:59:14,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:59:14,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:59:14,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:59:14,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:59:14,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:59:14,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:59:14,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:59:14,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:59:14,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:59:14,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:59:14,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:59:14,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:59:14,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:59:14,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:59:14,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:59:14,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:59:14,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:59:14,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:59:14,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:59:14,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:59:14,957 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:59:14,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:59:14,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:59:14,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:59:14,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:59:14,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:59:14,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:59:14,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:59:14,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:59:14,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:59:14,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:59:14,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:59:14,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:59:14,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:59:14,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:59:14,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:59:14,981 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 23:59:15,009 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:59:15,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:59:15,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:59:15,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:59:15,015 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:59:15,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:59:15,016 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:59:15,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:59:15,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:59:15,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:59:15,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 23:59:15,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:59:15,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 23:59:15,020 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:59:15,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:59:15,020 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:59:15,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 23:59:15,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:59:15,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:59:15,021 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:59:15,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:59:15,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:59:15,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:59:15,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:59:15,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 23:59:15,023 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:59:15,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:59:15,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 23:59:15,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:59:15,024 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f0612232c1c27f632e5ebc1ac9944571433fe3b [2020-11-29 23:59:15,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:59:15,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:59:15,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:59:15,452 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:59:15,453 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:59:15,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/../../sv-benchmarks/c/loop-simple/nested_4.c [2020-11-29 23:59:15,556 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/data/f59ae434c/47d2742143a442368d9fbd5072a04904/FLAGb1564602a [2020-11-29 23:59:16,183 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:59:16,184 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/sv-benchmarks/c/loop-simple/nested_4.c [2020-11-29 23:59:16,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/data/f59ae434c/47d2742143a442368d9fbd5072a04904/FLAGb1564602a [2020-11-29 23:59:16,555 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/data/f59ae434c/47d2742143a442368d9fbd5072a04904 [2020-11-29 23:59:16,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:59:16,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:59:16,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:59:16,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:59:16,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:59:16,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:59:16" (1/1) ... [2020-11-29 23:59:16,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71fd9d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:16, skipping insertion in model container [2020-11-29 23:59:16,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:59:16" (1/1) ... [2020-11-29 23:59:16,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:59:16,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:59:16,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:59:16,852 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:59:16,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:59:16,907 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:59:16,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:16 WrapperNode [2020-11-29 23:59:16,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:59:16,913 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:59:16,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:59:16,915 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:59:16,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:16" (1/1) ... [2020-11-29 23:59:16,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:16" (1/1) ... [2020-11-29 23:59:16,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:59:16,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:59:16,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:59:16,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:59:16,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:16" (1/1) ... [2020-11-29 23:59:16,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:16" (1/1) ... [2020-11-29 23:59:16,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:16" (1/1) ... [2020-11-29 23:59:16,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:16" (1/1) ... [2020-11-29 23:59:16,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:16" (1/1) ... [2020-11-29 23:59:17,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:16" (1/1) ... [2020-11-29 23:59:17,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:16" (1/1) ... [2020-11-29 23:59:17,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:59:17,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:59:17,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:59:17,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:59:17,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:59:17,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:59:17,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:59:17,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:59:17,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:59:17,571 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:59:17,571 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-29 23:59:17,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:59:17 BoogieIcfgContainer [2020-11-29 23:59:17,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:59:17,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:59:17,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:59:17,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:59:17,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:59:16" (1/3) ... [2020-11-29 23:59:17,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42282139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:59:17, skipping insertion in model container [2020-11-29 23:59:17,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:59:16" (2/3) ... [2020-11-29 23:59:17,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42282139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:59:17, skipping insertion in model container [2020-11-29 23:59:17,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:59:17" (3/3) ... [2020-11-29 23:59:17,586 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_4.c [2020-11-29 23:59:17,598 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:59:17,602 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 23:59:17,614 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 23:59:17,638 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:59:17,639 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 23:59:17,639 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:59:17,639 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:59:17,639 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:59:17,639 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:59:17,639 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:59:17,640 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:59:17,658 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-29 23:59:17,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-29 23:59:17,663 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:17,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-29 23:59:17,665 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:17,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:17,674 INFO L82 PathProgramCache]: Analyzing trace with hash 28738512, now seen corresponding path program 1 times [2020-11-29 23:59:17,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:17,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739366549] [2020-11-29 23:59:17,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:59:17,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739366549] [2020-11-29 23:59:17,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:59:17,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 23:59:17,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996861672] [2020-11-29 23:59:17,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 23:59:17,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:17,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 23:59:17,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:59:17,892 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-11-29 23:59:17,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:17,911 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2020-11-29 23:59:17,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 23:59:17,914 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-29 23:59:17,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:17,923 INFO L225 Difference]: With dead ends: 32 [2020-11-29 23:59:17,924 INFO L226 Difference]: Without dead ends: 13 [2020-11-29 23:59:17,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:59:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-29 23:59:17,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-29 23:59:17,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-29 23:59:17,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-11-29 23:59:17,976 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 5 [2020-11-29 23:59:17,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:17,976 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-11-29 23:59:17,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 23:59:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-11-29 23:59:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-29 23:59:17,978 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:17,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-29 23:59:17,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 23:59:17,979 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:17,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:17,982 INFO L82 PathProgramCache]: Analyzing trace with hash 28698150, now seen corresponding path program 1 times [2020-11-29 23:59:17,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:17,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102773106] [2020-11-29 23:59:17,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:59:18,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102773106] [2020-11-29 23:59:18,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:59:18,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:59:18,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004436059] [2020-11-29 23:59:18,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:59:18,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:18,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:59:18,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:59:18,092 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 3 states. [2020-11-29 23:59:18,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:18,128 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2020-11-29 23:59:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:59:18,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-29 23:59:18,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:18,131 INFO L225 Difference]: With dead ends: 24 [2020-11-29 23:59:18,131 INFO L226 Difference]: Without dead ends: 21 [2020-11-29 23:59:18,132 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 [2020-11-29 23:59:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-29 23:59:18,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2020-11-29 23:59:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-29 23:59:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-11-29 23:59:18,140 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 5 [2020-11-29 23:59:18,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:18,140 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-11-29 23:59:18,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:59:18,141 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2020-11-29 23:59:18,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 23:59:18,143 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:18,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:59:18,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 23:59:18,144 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:18,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:18,157 INFO L82 PathProgramCache]: Analyzing trace with hash 270060130, now seen corresponding path program 1 times [2020-11-29 23:59:18,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:18,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628303707] [2020-11-29 23:59:18,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:59:18,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628303707] [2020-11-29 23:59:18,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:59:18,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:59:18,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723892165] [2020-11-29 23:59:18,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:59:18,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:18,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:59:18,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:59:18,205 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2020-11-29 23:59:18,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:18,248 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2020-11-29 23:59:18,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:59:18,251 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-29 23:59:18,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:18,252 INFO L225 Difference]: With dead ends: 31 [2020-11-29 23:59:18,252 INFO L226 Difference]: Without dead ends: 20 [2020-11-29 23:59:18,252 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 [2020-11-29 23:59:18,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-29 23:59:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2020-11-29 23:59:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-29 23:59:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-11-29 23:59:18,260 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2020-11-29 23:59:18,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:18,261 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-11-29 23:59:18,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:59:18,262 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-11-29 23:59:18,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 23:59:18,263 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:18,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:59:18,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 23:59:18,265 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:18,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:18,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1248345450, now seen corresponding path program 1 times [2020-11-29 23:59:18,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:18,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54455774] [2020-11-29 23:59:18,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:59:18,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54455774] [2020-11-29 23:59:18,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:59:18,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:59:18,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144872048] [2020-11-29 23:59:18,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:59:18,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:18,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:59:18,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:59:18,335 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2020-11-29 23:59:18,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:18,370 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2020-11-29 23:59:18,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:59:18,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-11-29 23:59:18,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:18,372 INFO L225 Difference]: With dead ends: 31 [2020-11-29 23:59:18,372 INFO L226 Difference]: Without dead ends: 19 [2020-11-29 23:59:18,373 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 [2020-11-29 23:59:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-29 23:59:18,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-11-29 23:59:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-29 23:59:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-11-29 23:59:18,377 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2020-11-29 23:59:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:18,377 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-11-29 23:59:18,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:59:18,377 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-11-29 23:59:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 23:59:18,381 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:18,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:59:18,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 23:59:18,381 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:18,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:18,382 INFO L82 PathProgramCache]: Analyzing trace with hash -793045314, now seen corresponding path program 1 times [2020-11-29 23:59:18,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:18,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560774596] [2020-11-29 23:59:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:59:18,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560774596] [2020-11-29 23:59:18,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:59:18,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:59:18,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919385455] [2020-11-29 23:59:18,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:59:18,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:18,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:59:18,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:59:18,429 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2020-11-29 23:59:18,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:18,464 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-11-29 23:59:18,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:59:18,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-11-29 23:59:18,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:18,465 INFO L225 Difference]: With dead ends: 31 [2020-11-29 23:59:18,466 INFO L226 Difference]: Without dead ends: 18 [2020-11-29 23:59:18,466 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 [2020-11-29 23:59:18,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-29 23:59:18,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-11-29 23:59:18,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-29 23:59:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-11-29 23:59:18,470 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2020-11-29 23:59:18,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:18,470 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-11-29 23:59:18,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:59:18,471 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-11-29 23:59:18,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 23:59:18,472 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:18,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:59:18,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 23:59:18,473 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:18,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:18,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1973513092, now seen corresponding path program 1 times [2020-11-29 23:59:18,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:18,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217796835] [2020-11-29 23:59:18,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:59:18,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217796835] [2020-11-29 23:59:18,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928398854] [2020-11-29 23:59:18,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:18,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 23:59:18,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:59:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:59:18,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:59:18,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-29 23:59:18,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867752489] [2020-11-29 23:59:18,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:59:18,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:18,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:59:18,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:59:18,702 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-11-29 23:59:18,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:18,753 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-11-29 23:59:18,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:59:18,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-29 23:59:18,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:18,754 INFO L225 Difference]: With dead ends: 34 [2020-11-29 23:59:18,754 INFO L226 Difference]: Without dead ends: 20 [2020-11-29 23:59:18,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:59:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-29 23:59:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-11-29 23:59:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-29 23:59:18,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-11-29 23:59:18,767 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2020-11-29 23:59:18,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:18,767 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-11-29 23:59:18,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:59:18,767 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-11-29 23:59:18,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 23:59:18,768 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:18,782 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:59:19,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 23:59:19,002 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:19,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:19,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1763285690, now seen corresponding path program 2 times [2020-11-29 23:59:19,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:19,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349133803] [2020-11-29 23:59:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 23:59:19,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349133803] [2020-11-29 23:59:19,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808460231] [2020-11-29 23:59:19,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:19,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:59:19,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:59:19,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:59:19,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:59:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:59:19,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:59:19,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-11-29 23:59:19,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937470568] [2020-11-29 23:59:19,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 23:59:19,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:19,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 23:59:19,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:59:19,188 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 7 states. [2020-11-29 23:59:19,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:19,446 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-11-29 23:59:19,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 23:59:19,447 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-11-29 23:59:19,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:19,448 INFO L225 Difference]: With dead ends: 57 [2020-11-29 23:59:19,448 INFO L226 Difference]: Without dead ends: 41 [2020-11-29 23:59:19,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-11-29 23:59:19,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-29 23:59:19,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2020-11-29 23:59:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 23:59:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-11-29 23:59:19,457 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2020-11-29 23:59:19,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:19,457 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-11-29 23:59:19,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 23:59:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-11-29 23:59:19,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 23:59:19,459 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:19,459 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:59:19,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:19,666 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:19,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:19,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1745752790, now seen corresponding path program 3 times [2020-11-29 23:59:19,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:19,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431494265] [2020-11-29 23:59:19,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-11-29 23:59:19,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431494265] [2020-11-29 23:59:19,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782530041] [2020-11-29 23:59:19,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:19,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 23:59:19,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:59:19,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 23:59:19,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:59:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-11-29 23:59:19,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:59:19,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-11-29 23:59:19,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626986231] [2020-11-29 23:59:19,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:59:19,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:19,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:59:19,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:59:19,859 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-11-29 23:59:20,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:20,036 INFO L93 Difference]: Finished difference Result 227 states and 265 transitions. [2020-11-29 23:59:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 23:59:20,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-11-29 23:59:20,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:20,045 INFO L225 Difference]: With dead ends: 227 [2020-11-29 23:59:20,046 INFO L226 Difference]: Without dead ends: 200 [2020-11-29 23:59:20,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-11-29 23:59:20,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-11-29 23:59:20,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 96. [2020-11-29 23:59:20,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-29 23:59:20,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-11-29 23:59:20,075 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 29 [2020-11-29 23:59:20,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:20,090 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-11-29 23:59:20,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:59:20,090 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-11-29 23:59:20,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-29 23:59:20,095 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:20,095 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 23:59:20,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:20,298 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:20,299 INFO L82 PathProgramCache]: Analyzing trace with hash 305051558, now seen corresponding path program 4 times [2020-11-29 23:59:20,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:20,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322893772] [2020-11-29 23:59:20,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 193 proven. 9 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2020-11-29 23:59:20,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322893772] [2020-11-29 23:59:20,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750509312] [2020-11-29 23:59:20,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:20,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 23:59:20,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:59:20,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 23:59:20,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:59:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 193 proven. 9 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2020-11-29 23:59:20,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:59:20,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 23:59:20,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077373283] [2020-11-29 23:59:20,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 23:59:20,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:20,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 23:59:20,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:59:20,656 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 7 states. [2020-11-29 23:59:20,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:20,718 INFO L93 Difference]: Finished difference Result 204 states and 239 transitions. [2020-11-29 23:59:20,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:59:20,719 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-11-29 23:59:20,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:20,721 INFO L225 Difference]: With dead ends: 204 [2020-11-29 23:59:20,721 INFO L226 Difference]: Without dead ends: 120 [2020-11-29 23:59:20,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:59:20,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-29 23:59:20,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2020-11-29 23:59:20,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-29 23:59:20,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2020-11-29 23:59:20,760 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 95 [2020-11-29 23:59:20,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:20,770 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2020-11-29 23:59:20,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 23:59:20,771 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2020-11-29 23:59:20,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-29 23:59:20,775 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:20,775 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 23:59:20,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:20,998 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:20,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:20,999 INFO L82 PathProgramCache]: Analyzing trace with hash -986598490, now seen corresponding path program 5 times [2020-11-29 23:59:20,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:20,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102852038] [2020-11-29 23:59:20,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 16 refuted. 0 times theorem prover too weak. 1074 trivial. 0 not checked. [2020-11-29 23:59:21,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102852038] [2020-11-29 23:59:21,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970732373] [2020-11-29 23:59:21,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:21,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-29 23:59:21,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:59:21,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 23:59:21,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:59:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 754 proven. 16 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-11-29 23:59:21,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:59:21,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 23:59:21,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516594856] [2020-11-29 23:59:21,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 23:59:21,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:21,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 23:59:21,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:59:21,373 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand 8 states. [2020-11-29 23:59:21,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:21,432 INFO L93 Difference]: Finished difference Result 234 states and 269 transitions. [2020-11-29 23:59:21,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:59:21,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-11-29 23:59:21,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:21,435 INFO L225 Difference]: With dead ends: 234 [2020-11-29 23:59:21,435 INFO L226 Difference]: Without dead ends: 136 [2020-11-29 23:59:21,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:59:21,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-11-29 23:59:21,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2020-11-29 23:59:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-11-29 23:59:21,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 142 transitions. [2020-11-29 23:59:21,469 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 142 transitions. Word has length 111 [2020-11-29 23:59:21,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:21,470 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 142 transitions. [2020-11-29 23:59:21,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 23:59:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 142 transitions. [2020-11-29 23:59:21,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-11-29 23:59:21,475 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:21,476 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 23:59:21,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-29 23:59:21,702 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:21,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:21,703 INFO L82 PathProgramCache]: Analyzing trace with hash -859525210, now seen corresponding path program 6 times [2020-11-29 23:59:21,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:21,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169891009] [2020-11-29 23:59:21,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 445 proven. 25 refuted. 0 times theorem prover too weak. 1557 trivial. 0 not checked. [2020-11-29 23:59:21,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169891009] [2020-11-29 23:59:21,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97497333] [2020-11-29 23:59:21,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:21,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-11-29 23:59:21,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:59:21,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:59:21,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:59:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 1094 proven. 25 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2020-11-29 23:59:22,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:59:22,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 23:59:22,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034318518] [2020-11-29 23:59:22,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 23:59:22,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:22,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 23:59:22,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:59:22,039 INFO L87 Difference]: Start difference. First operand 128 states and 142 transitions. Second operand 9 states. [2020-11-29 23:59:22,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:22,092 INFO L93 Difference]: Finished difference Result 256 states and 291 transitions. [2020-11-29 23:59:22,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 23:59:22,093 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 127 [2020-11-29 23:59:22,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:22,094 INFO L225 Difference]: With dead ends: 256 [2020-11-29 23:59:22,094 INFO L226 Difference]: Without dead ends: 144 [2020-11-29 23:59:22,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:59:22,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-11-29 23:59:22,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-11-29 23:59:22,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-29 23:59:22,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2020-11-29 23:59:22,123 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 127 [2020-11-29 23:59:22,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:22,123 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2020-11-29 23:59:22,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 23:59:22,124 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2020-11-29 23:59:22,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-11-29 23:59:22,129 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:22,130 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 23:59:22,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:22,351 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:22,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1331145638, now seen corresponding path program 7 times [2020-11-29 23:59:22,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:22,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739230433] [2020-11-29 23:59:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1066 proven. 89 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2020-11-29 23:59:22,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739230433] [2020-11-29 23:59:22,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74097546] [2020-11-29 23:59:22,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:22,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:59:22,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:59:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1066 proven. 89 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2020-11-29 23:59:22,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:59:22,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-29 23:59:22,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034482086] [2020-11-29 23:59:22,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:59:22,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:22,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:59:22,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:59:22,664 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand 6 states. [2020-11-29 23:59:22,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:22,711 INFO L93 Difference]: Finished difference Result 369 states and 406 transitions. [2020-11-29 23:59:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 23:59:22,712 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2020-11-29 23:59:22,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:22,714 INFO L225 Difference]: With dead ends: 369 [2020-11-29 23:59:22,714 INFO L226 Difference]: Without dead ends: 260 [2020-11-29 23:59:22,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:59:22,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-11-29 23:59:22,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 204. [2020-11-29 23:59:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-11-29 23:59:22,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 222 transitions. [2020-11-29 23:59:22,747 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 222 transitions. Word has length 143 [2020-11-29 23:59:22,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:22,751 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 222 transitions. [2020-11-29 23:59:22,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:59:22,751 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 222 transitions. [2020-11-29 23:59:22,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-11-29 23:59:22,756 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:22,756 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 12, 12, 12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 23:59:22,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:22,974 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:22,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1485965146, now seen corresponding path program 8 times [2020-11-29 23:59:22,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:22,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807506975] [2020-11-29 23:59:22,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2020-11-29 23:59:23,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807506975] [2020-11-29 23:59:23,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087245861] [2020-11-29 23:59:23,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:23,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:59:23,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:59:23,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 23:59:23,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:59:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2020-11-29 23:59:23,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:59:23,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 23:59:23,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320248723] [2020-11-29 23:59:23,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 23:59:23,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:23,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 23:59:23,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:59:23,339 INFO L87 Difference]: Start difference. First operand 204 states and 222 transitions. Second operand 7 states. [2020-11-29 23:59:23,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:23,403 INFO L93 Difference]: Finished difference Result 474 states and 518 transitions. [2020-11-29 23:59:23,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:59:23,403 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 203 [2020-11-29 23:59:23,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:23,406 INFO L225 Difference]: With dead ends: 474 [2020-11-29 23:59:23,406 INFO L226 Difference]: Without dead ends: 320 [2020-11-29 23:59:23,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:59:23,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-11-29 23:59:23,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 264. [2020-11-29 23:59:23,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-11-29 23:59:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 286 transitions. [2020-11-29 23:59:23,431 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 286 transitions. Word has length 203 [2020-11-29 23:59:23,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:23,432 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 286 transitions. [2020-11-29 23:59:23,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 23:59:23,432 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 286 transitions. [2020-11-29 23:59:23,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-11-29 23:59:23,436 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:23,436 INFO L422 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 23:59:23,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 23:59:23,650 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:23,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:23,651 INFO L82 PathProgramCache]: Analyzing trace with hash 889851302, now seen corresponding path program 9 times [2020-11-29 23:59:23,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:23,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199616363] [2020-11-29 23:59:23,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4210 proven. 526 refuted. 0 times theorem prover too weak. 6375 trivial. 0 not checked. [2020-11-29 23:59:23,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199616363] [2020-11-29 23:59:23,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545359622] [2020-11-29 23:59:23,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:24,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-11-29 23:59:24,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:59:24,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 23:59:24,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:59:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4214 proven. 526 refuted. 0 times theorem prover too weak. 6371 trivial. 0 not checked. [2020-11-29 23:59:24,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:59:24,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 23:59:24,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135953118] [2020-11-29 23:59:24,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 23:59:24,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:24,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 23:59:24,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:59:24,127 INFO L87 Difference]: Start difference. First operand 264 states and 286 transitions. Second operand 8 states. [2020-11-29 23:59:24,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:24,206 INFO L93 Difference]: Finished difference Result 579 states and 630 transitions. [2020-11-29 23:59:24,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:59:24,207 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 263 [2020-11-29 23:59:24,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:24,210 INFO L225 Difference]: With dead ends: 579 [2020-11-29 23:59:24,210 INFO L226 Difference]: Without dead ends: 380 [2020-11-29 23:59:24,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:59:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-11-29 23:59:24,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 324. [2020-11-29 23:59:24,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-11-29 23:59:24,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 350 transitions. [2020-11-29 23:59:24,243 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 350 transitions. Word has length 263 [2020-11-29 23:59:24,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:24,245 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 350 transitions. [2020-11-29 23:59:24,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 23:59:24,245 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 350 transitions. [2020-11-29 23:59:24,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-11-29 23:59:24,251 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:24,251 INFO L422 BasicCegarLoop]: trace histogram [120, 120, 20, 20, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 23:59:24,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:24,478 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:24,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:24,479 INFO L82 PathProgramCache]: Analyzing trace with hash -955282778, now seen corresponding path program 10 times [2020-11-29 23:59:24,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:24,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097574098] [2020-11-29 23:59:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 6565 proven. 875 refuted. 0 times theorem prover too weak. 9921 trivial. 0 not checked. [2020-11-29 23:59:24,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097574098] [2020-11-29 23:59:24,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39749174] [2020-11-29 23:59:24,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:25,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 23:59:25,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:59:25,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:59:25,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:59:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 6565 proven. 875 refuted. 0 times theorem prover too weak. 9921 trivial. 0 not checked. [2020-11-29 23:59:25,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:59:25,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 23:59:25,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741475445] [2020-11-29 23:59:25,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 23:59:25,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:25,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 23:59:25,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:59:25,158 INFO L87 Difference]: Start difference. First operand 324 states and 350 transitions. Second operand 9 states. [2020-11-29 23:59:25,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:25,269 INFO L93 Difference]: Finished difference Result 628 states and 682 transitions. [2020-11-29 23:59:25,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 23:59:25,269 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 323 [2020-11-29 23:59:25,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:25,272 INFO L225 Difference]: With dead ends: 628 [2020-11-29 23:59:25,273 INFO L226 Difference]: Without dead ends: 384 [2020-11-29 23:59:25,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:59:25,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-11-29 23:59:25,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2020-11-29 23:59:25,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-11-29 23:59:25,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 414 transitions. [2020-11-29 23:59:25,309 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 414 transitions. Word has length 323 [2020-11-29 23:59:25,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:25,309 INFO L481 AbstractCegarLoop]: Abstraction has 384 states and 414 transitions. [2020-11-29 23:59:25,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 23:59:25,310 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 414 transitions. [2020-11-29 23:59:25,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2020-11-29 23:59:25,318 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:25,318 INFO L422 BasicCegarLoop]: trace histogram [144, 144, 24, 24, 24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 23:59:25,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 23:59:25,534 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:25,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:25,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1217433690, now seen corresponding path program 11 times [2020-11-29 23:59:25,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:25,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899406394] [2020-11-29 23:59:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2020-11-29 23:59:25,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899406394] [2020-11-29 23:59:25,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410338431] [2020-11-29 23:59:25,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:26,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 130 check-sat command(s) [2020-11-29 23:59:26,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:59:26,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:59:26,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:59:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2020-11-29 23:59:26,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:59:26,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-29 23:59:26,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484082381] [2020-11-29 23:59:26,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:59:26,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:26,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:59:26,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:59:26,514 INFO L87 Difference]: Start difference. First operand 384 states and 414 transitions. Second operand 6 states. [2020-11-29 23:59:26,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:26,604 INFO L93 Difference]: Finished difference Result 948 states and 1023 transitions. [2020-11-29 23:59:26,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 23:59:26,605 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 383 [2020-11-29 23:59:26,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:26,611 INFO L225 Difference]: With dead ends: 948 [2020-11-29 23:59:26,612 INFO L226 Difference]: Without dead ends: 754 [2020-11-29 23:59:26,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:59:26,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2020-11-29 23:59:26,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 570. [2020-11-29 23:59:26,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 570 states. [2020-11-29 23:59:26,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 614 transitions. [2020-11-29 23:59:26,679 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 614 transitions. Word has length 383 [2020-11-29 23:59:26,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:26,680 INFO L481 AbstractCegarLoop]: Abstraction has 570 states and 614 transitions. [2020-11-29 23:59:26,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:59:26,680 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 614 transitions. [2020-11-29 23:59:26,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2020-11-29 23:59:26,698 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:26,699 INFO L422 BasicCegarLoop]: trace histogram [216, 216, 36, 36, 36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 23:59:26,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 23:59:26,914 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:26,915 INFO L82 PathProgramCache]: Analyzing trace with hash 267351982, now seen corresponding path program 12 times [2020-11-29 23:59:26,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:26,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405085246] [2020-11-29 23:59:26,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 28332 proven. 9444 refuted. 0 times theorem prover too weak. 18608 trivial. 0 not checked. [2020-11-29 23:59:27,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405085246] [2020-11-29 23:59:27,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432623633] [2020-11-29 23:59:27,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:27,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 134 check-sat command(s) [2020-11-29 23:59:27,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:59:27,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:59:28,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:59:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 0 proven. 28334 refuted. 0 times theorem prover too weak. 28050 trivial. 0 not checked. [2020-11-29 23:59:28,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:59:28,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-11-29 23:59:28,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095871496] [2020-11-29 23:59:28,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 23:59:28,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:28,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 23:59:28,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:59:28,470 INFO L87 Difference]: Start difference. First operand 570 states and 614 transitions. Second operand 9 states. [2020-11-29 23:59:28,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:28,933 INFO L93 Difference]: Finished difference Result 2160 states and 2331 transitions. [2020-11-29 23:59:28,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-29 23:59:28,933 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 569 [2020-11-29 23:59:28,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:28,946 INFO L225 Difference]: With dead ends: 2160 [2020-11-29 23:59:28,946 INFO L226 Difference]: Without dead ends: 1873 [2020-11-29 23:59:28,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-11-29 23:59:28,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2020-11-29 23:59:29,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1131. [2020-11-29 23:59:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1131 states. [2020-11-29 23:59:29,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1218 transitions. [2020-11-29 23:59:29,081 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1218 transitions. Word has length 569 [2020-11-29 23:59:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:29,082 INFO L481 AbstractCegarLoop]: Abstraction has 1131 states and 1218 transitions. [2020-11-29 23:59:29,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 23:59:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1218 transitions. [2020-11-29 23:59:29,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1131 [2020-11-29 23:59:29,102 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:29,103 INFO L422 BasicCegarLoop]: trace histogram [432, 432, 72, 72, 72, 12, 12, 12, 3, 3, 3, 1, 1, 1, 1, 1] [2020-11-29 23:59:29,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 23:59:29,318 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:29,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:29,319 INFO L82 PathProgramCache]: Analyzing trace with hash 550676450, now seen corresponding path program 13 times [2020-11-29 23:59:29,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:29,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519877400] [2020-11-29 23:59:29,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 226074 backedges. 100725 proven. 18886 refuted. 0 times theorem prover too weak. 106463 trivial. 0 not checked. [2020-11-29 23:59:30,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519877400] [2020-11-29 23:59:30,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53192834] [2020-11-29 23:59:30,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:31,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 1860 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 23:59:31,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:59:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 226074 backedges. 100725 proven. 18886 refuted. 0 times theorem prover too weak. 106463 trivial. 0 not checked. [2020-11-29 23:59:32,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:59:32,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 23:59:32,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997885097] [2020-11-29 23:59:32,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 23:59:32,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:32,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 23:59:32,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:59:32,550 INFO L87 Difference]: Start difference. First operand 1131 states and 1218 transitions. Second operand 8 states. [2020-11-29 23:59:32,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:32,775 INFO L93 Difference]: Finished difference Result 2441 states and 2631 transitions. [2020-11-29 23:59:32,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:59:32,776 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1130 [2020-11-29 23:59:32,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:32,788 INFO L225 Difference]: With dead ends: 2441 [2020-11-29 23:59:32,788 INFO L226 Difference]: Without dead ends: 1686 [2020-11-29 23:59:32,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:59:32,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2020-11-29 23:59:32,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1410. [2020-11-29 23:59:32,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1410 states. [2020-11-29 23:59:32,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 1518 transitions. [2020-11-29 23:59:32,914 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 1518 transitions. Word has length 1130 [2020-11-29 23:59:32,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:32,916 INFO L481 AbstractCegarLoop]: Abstraction has 1410 states and 1518 transitions. [2020-11-29 23:59:32,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 23:59:32,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 1518 transitions. [2020-11-29 23:59:32,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1410 [2020-11-29 23:59:32,935 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:32,936 INFO L422 BasicCegarLoop]: trace histogram [540, 540, 90, 90, 90, 15, 15, 15, 3, 3, 3, 1, 1, 1, 1, 1] [2020-11-29 23:59:33,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 23:59:33,150 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:33,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:33,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1545912050, now seen corresponding path program 14 times [2020-11-29 23:59:33,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:33,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825402416] [2020-11-29 23:59:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 353397 backedges. 157375 proven. 31475 refuted. 0 times theorem prover too weak. 164547 trivial. 0 not checked. [2020-11-29 23:59:35,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825402416] [2020-11-29 23:59:35,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710428228] [2020-11-29 23:59:35,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:36,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:59:36,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:59:36,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 2310 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:59:36,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:59:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 353397 backedges. 157375 proven. 31475 refuted. 0 times theorem prover too weak. 164547 trivial. 0 not checked. [2020-11-29 23:59:38,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 23:59:38,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 23:59:38,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665063079] [2020-11-29 23:59:38,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 23:59:38,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:38,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 23:59:38,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:59:38,034 INFO L87 Difference]: Start difference. First operand 1410 states and 1518 transitions. Second operand 9 states. [2020-11-29 23:59:38,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:38,243 INFO L93 Difference]: Finished difference Result 2630 states and 2834 transitions. [2020-11-29 23:59:38,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 23:59:38,244 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1409 [2020-11-29 23:59:38,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:38,255 INFO L225 Difference]: With dead ends: 2630 [2020-11-29 23:59:38,256 INFO L226 Difference]: Without dead ends: 1689 [2020-11-29 23:59:38,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1416 GetRequests, 1409 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:59:38,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2020-11-29 23:59:38,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1689. [2020-11-29 23:59:38,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1689 states. [2020-11-29 23:59:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 1818 transitions. [2020-11-29 23:59:38,402 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 1818 transitions. Word has length 1409 [2020-11-29 23:59:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:38,403 INFO L481 AbstractCegarLoop]: Abstraction has 1689 states and 1818 transitions. [2020-11-29 23:59:38,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 23:59:38,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 1818 transitions. [2020-11-29 23:59:38,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1689 [2020-11-29 23:59:38,446 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:59:38,447 INFO L422 BasicCegarLoop]: trace histogram [648, 648, 108, 108, 108, 18, 18, 18, 3, 3, 3, 1, 1, 1, 1, 1] [2020-11-29 23:59:38,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:38,674 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:59:38,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:59:38,675 INFO L82 PathProgramCache]: Analyzing trace with hash -477789726, now seen corresponding path program 15 times [2020-11-29 23:59:38,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:59:38,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408477777] [2020-11-29 23:59:38,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:59:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:59:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 509043 backedges. 0 proven. 339924 refuted. 0 times theorem prover too weak. 169119 trivial. 0 not checked. [2020-11-29 23:59:43,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408477777] [2020-11-29 23:59:43,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062001043] [2020-11-29 23:59:43,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:43,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 189 check-sat command(s) [2020-11-29 23:59:43,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:59:44,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 23:59:44,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:59:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 509043 backedges. 242798 proven. 0 refuted. 0 times theorem prover too weak. 266245 trivial. 0 not checked. [2020-11-29 23:59:46,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:59:46,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [6] total 18 [2020-11-29 23:59:46,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761660300] [2020-11-29 23:59:46,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 23:59:46,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:59:46,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 23:59:46,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-11-29 23:59:46,877 INFO L87 Difference]: Start difference. First operand 1689 states and 1818 transitions. Second operand 14 states. [2020-11-29 23:59:47,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:59:47,120 INFO L93 Difference]: Finished difference Result 1689 states and 1818 transitions. [2020-11-29 23:59:47,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 23:59:47,120 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1688 [2020-11-29 23:59:47,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:59:47,124 INFO L225 Difference]: With dead ends: 1689 [2020-11-29 23:59:47,125 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 23:59:47,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1693 GetRequests, 1677 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-11-29 23:59:47,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 23:59:47,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 23:59:47,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 23:59:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 23:59:47,132 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1688 [2020-11-29 23:59:47,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:59:47,132 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:59:47,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 23:59:47,133 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 23:59:47,133 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 23:59:47,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:59:47,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 23:59:47,831 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 43 [2020-11-30 00:00:01,329 WARN L193 SmtUtils]: Spent 13.49 s on a formula simplification. DAG size of input: 2361 DAG size of output: 436 [2020-11-30 00:00:01,479 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 12 [2020-11-30 00:00:04,948 WARN L193 SmtUtils]: Spent 3.46 s on a formula simplification. DAG size of input: 416 DAG size of output: 11 [2020-11-30 00:00:05,046 INFO L274 CegarLoopResult]: For program point L31(lines 31 33) no Hoare annotation was computed. [2020-11-30 00:00:05,046 INFO L274 CegarLoopResult]: For program point L23-2(lines 23 29) no Hoare annotation was computed. [2020-11-30 00:00:05,046 INFO L270 CegarLoopResult]: At program point L23-3(lines 23 29) the Hoare annotation is: (and (< ULTIMATE.start_main_~c~0 7) (< ULTIMATE.start_main_~d~0 7) (< ULTIMATE.start_main_~a~0 6) (<= 6 ULTIMATE.start_main_~d~0) (< ULTIMATE.start_main_~b~0 7) (<= 6 ULTIMATE.start_main_~c~0)) [2020-11-30 00:00:05,046 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-30 00:00:05,047 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 00:00:05,047 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-30 00:00:05,047 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-11-30 00:00:05,047 INFO L274 CegarLoopResult]: For program point L24-2(lines 24 28) no Hoare annotation was computed. [2020-11-30 00:00:05,047 INFO L270 CegarLoopResult]: At program point L24-3(lines 24 28) the Hoare annotation is: (and (< ULTIMATE.start_main_~c~0 7) (< ULTIMATE.start_main_~d~0 7) (< ULTIMATE.start_main_~a~0 6) (< ULTIMATE.start_main_~b~0 6) (<= 6 ULTIMATE.start_main_~d~0)) [2020-11-30 00:00:05,047 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 00:00:05,047 INFO L274 CegarLoopResult]: For program point L25-2(lines 25 27) no Hoare annotation was computed. [2020-11-30 00:00:05,047 INFO L270 CegarLoopResult]: At program point L25-3(lines 25 27) the Hoare annotation is: (and (< ULTIMATE.start_main_~d~0 7) (< ULTIMATE.start_main_~a~0 6) (< ULTIMATE.start_main_~b~0 6) (< ULTIMATE.start_main_~c~0 6)) [2020-11-30 00:00:05,047 INFO L274 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-11-30 00:00:05,047 INFO L277 CegarLoopResult]: At program point L34(lines 15 35) the Hoare annotation is: true [2020-11-30 00:00:05,048 INFO L274 CegarLoopResult]: For program point L22-2(lines 22 30) no Hoare annotation was computed. [2020-11-30 00:00:05,048 INFO L270 CegarLoopResult]: At program point L22-3(lines 22 30) the Hoare annotation is: (and (< ULTIMATE.start_main_~c~0 7) (< ULTIMATE.start_main_~d~0 7) (<= 6 ULTIMATE.start_main_~d~0) (< ULTIMATE.start_main_~b~0 7) (<= 6 ULTIMATE.start_main_~b~0) (<= 6 ULTIMATE.start_main_~c~0) (< ULTIMATE.start_main_~a~0 7)) [2020-11-30 00:00:05,048 INFO L274 CegarLoopResult]: For program point L22-4(lines 15 35) no Hoare annotation was computed. [2020-11-30 00:00:05,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:00:05 BoogieIcfgContainer [2020-11-30 00:00:05,065 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:00:05,066 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:00:05,066 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:00:05,067 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:00:05,067 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:59:17" (3/4) ... [2020-11-30 00:00:05,071 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 00:00:05,083 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-30 00:00:05,083 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 00:00:05,084 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 00:00:05,084 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 00:00:05,136 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_30a55d6d-8d68-4ac2-b52c-3e321b0fe918/bin/uautomizer/witness.graphml [2020-11-30 00:00:05,136 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:00:05,138 INFO L168 Benchmark]: Toolchain (without parser) took 48575.56 ms. Allocated memory was 98.6 MB in the beginning and 3.1 GB in the end (delta: 3.0 GB). Free memory was 69.7 MB in the beginning and 2.2 GB in the end (delta: -2.1 GB). Peak memory consumption was 833.2 MB. Max. memory is 16.1 GB. [2020-11-30 00:00:05,138 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 98.6 MB. Free memory was 57.9 MB in the beginning and 57.9 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:00:05,139 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.26 ms. Allocated memory is still 98.6 MB. Free memory was 69.4 MB in the beginning and 75.9 MB in the end (delta: -6.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:00:05,139 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.72 ms. Allocated memory is still 98.6 MB. Free memory was 75.9 MB in the beginning and 74.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:00:05,139 INFO L168 Benchmark]: Boogie Preprocessor took 54.77 ms. Allocated memory is still 98.6 MB. Free memory was 74.6 MB in the beginning and 73.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:00:05,140 INFO L168 Benchmark]: RCFGBuilder took 551.06 ms. Allocated memory is still 98.6 MB. Free memory was 73.4 MB in the beginning and 61.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:00:05,141 INFO L168 Benchmark]: TraceAbstraction took 47488.39 ms. Allocated memory was 98.6 MB in the beginning and 3.1 GB in the end (delta: 3.0 GB). Free memory was 60.9 MB in the beginning and 2.2 GB in the end (delta: -2.1 GB). Peak memory consumption was 1.8 GB. Max. memory is 16.1 GB. [2020-11-30 00:00:05,141 INFO L168 Benchmark]: Witness Printer took 70.55 ms. Allocated memory is still 3.1 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:00:05,144 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 98.6 MB. Free memory was 57.9 MB in the beginning and 57.9 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 343.26 ms. Allocated memory is still 98.6 MB. Free memory was 69.4 MB in the beginning and 75.9 MB in the end (delta: -6.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.72 ms. Allocated memory is still 98.6 MB. Free memory was 75.9 MB in the beginning and 74.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.77 ms. Allocated memory is still 98.6 MB. Free memory was 74.6 MB in the beginning and 73.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 551.06 ms. Allocated memory is still 98.6 MB. Free memory was 73.4 MB in the beginning and 61.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 47488.39 ms. Allocated memory was 98.6 MB in the beginning and 3.1 GB in the end (delta: 3.0 GB). Free memory was 60.9 MB in the beginning and 2.2 GB in the end (delta: -2.1 GB). Peak memory consumption was 1.8 GB. Max. memory is 16.1 GB. * Witness Printer took 70.55 ms. Allocated memory is still 3.1 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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: 24]: Loop Invariant Derived loop invariant: (((c < 7 && d < 7) && a < 6) && b < 6) && 6 <= d - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((d < 7 && a < 6) && b < 6) && c < 6 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((((c < 7 && d < 7) && 6 <= d) && b < 7) && 6 <= b) && 6 <= c) && a < 7 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((c < 7 && d < 7) && a < 6) && 6 <= d) && b < 7) && 6 <= c - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 29.6s, OverallIterations: 20, TraceHistogramMax: 648, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 17.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 268 SDtfs, 557 SDslu, 596 SDs, 0 SdLazy, 420 SolverSat, 75 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6619 GetRequests, 6501 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1689occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 20 MinimizatonAttempts, 1518 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 913 NumberOfFragments, 71 HoareAnnotationTreeSize, 5 FomulaSimplifications, 578085 FormulaSimplificationTreeSizeReduction, 14.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 21916 FormulaSimplificationTreeSizeReductionInter, 3.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 4.9s SatisfiabilityAnalysisTime, 9.7s InterpolantComputationTime, 13057 NumberOfCodeBlocks, 11607 NumberOfCodeBlocksAsserted, 554 NumberOfCheckSat, 13022 ConstructedInterpolants, 0 QuantifiedInterpolants, 27926649 SizeOfPredicates, 18 NumberOfNonLiveVariables, 8601 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 35 InterpolantComputations, 6 PerfectInterpolantSequences, 1935239/2423578 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...