./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_b2_o3.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_f7b5fd6c-8533-47e7-a975-bb65803a38a0/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f7b5fd6c-8533-47e7-a975-bb65803a38a0/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f7b5fd6c-8533-47e7-a975-bb65803a38a0/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f7b5fd6c-8533-47e7-a975-bb65803a38a0/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_b2_o3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f7b5fd6c-8533-47e7-a975-bb65803a38a0/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f7b5fd6c-8533-47e7-a975-bb65803a38a0/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 b0b05dcf763e887e9392537d1f8dbe5d5ee01cea ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:35:27,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:35:27,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:35:27,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:35:27,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:35:27,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:35:27,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:35:27,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:35:27,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:35:27,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:35:27,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:35:27,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:35:27,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:35:27,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:35:27,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:35:27,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:35:27,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:35:27,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:35:27,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:35:27,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:35:27,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:35:27,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:35:27,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:35:27,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:35:27,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:35:27,986 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:35:27,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:35:27,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:35:27,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:35:27,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:35:27,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:35:27,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:35:27,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:35:27,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:35:27,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:35:27,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:35:27,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:35:27,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:35:27,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:35:28,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:35:28,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:35:28,002 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f7b5fd6c-8533-47e7-a975-bb65803a38a0/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 00:35:28,034 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:35:28,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:35:28,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:35:28,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:35:28,036 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:35:28,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:35:28,037 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:35:28,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:35:28,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:35:28,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:35:28,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 00:35:28,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:35:28,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 00:35:28,039 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:35:28,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:35:28,040 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:35:28,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 00:35:28,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:35:28,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:35:28,041 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:35:28,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:35:28,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:35:28,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:35:28,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:35:28,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 00:35:28,043 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:35:28,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:35:28,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 00:35:28,044 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:35:28,044 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_f7b5fd6c-8533-47e7-a975-bb65803a38a0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f7b5fd6c-8533-47e7-a975-bb65803a38a0/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0b05dcf763e887e9392537d1f8dbe5d5ee01cea [2020-11-30 00:35:28,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:35:28,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:35:28,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:35:28,390 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:35:28,394 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:35:28,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f7b5fd6c-8533-47e7-a975-bb65803a38a0/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id2_b2_o3.c [2020-11-30 00:35:28,503 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f7b5fd6c-8533-47e7-a975-bb65803a38a0/bin/uautomizer/data/6810af249/683d7fa83ca942b9bf72d9e73853dfcd/FLAG6e3b15bf2 [2020-11-30 00:35:29,044 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:35:29,045 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f7b5fd6c-8533-47e7-a975-bb65803a38a0/sv-benchmarks/c/recursive-simple/id2_b2_o3.c [2020-11-30 00:35:29,058 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f7b5fd6c-8533-47e7-a975-bb65803a38a0/bin/uautomizer/data/6810af249/683d7fa83ca942b9bf72d9e73853dfcd/FLAG6e3b15bf2 [2020-11-30 00:35:29,381 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f7b5fd6c-8533-47e7-a975-bb65803a38a0/bin/uautomizer/data/6810af249/683d7fa83ca942b9bf72d9e73853dfcd [2020-11-30 00:35:29,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:35:29,385 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:35:29,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:35:29,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:35:29,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:35:29,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:35:29" (1/1) ... [2020-11-30 00:35:29,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ff7cd63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:29, skipping insertion in model container [2020-11-30 00:35:29,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:35:29" (1/1) ... [2020-11-30 00:35:29,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:35:29,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:35:29,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:35:29,648 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:35:29,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:35:29,678 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:35:29,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:29 WrapperNode [2020-11-30 00:35:29,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:35:29,681 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:35:29,681 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:35:29,681 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:35:29,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:29" (1/1) ... [2020-11-30 00:35:29,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:29" (1/1) ... [2020-11-30 00:35:29,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:35:29,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:35:29,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:35:29,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:35:29,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:29" (1/1) ... [2020-11-30 00:35:29,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:29" (1/1) ... [2020-11-30 00:35:29,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:29" (1/1) ... [2020-11-30 00:35:29,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:29" (1/1) ... [2020-11-30 00:35:29,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:29" (1/1) ... [2020-11-30 00:35:29,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:29" (1/1) ... [2020-11-30 00:35:29,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:29" (1/1) ... [2020-11-30 00:35:29,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:35:29,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:35:29,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:35:29,746 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:35:29,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7b5fd6c-8533-47e7-a975-bb65803a38a0/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 [2020-11-30 00:35:29,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:35:29,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:35:29,818 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-11-30 00:35:29,818 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-11-30 00:35:29,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:35:29,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:35:29,819 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-30 00:35:29,819 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-30 00:35:30,080 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:35:30,080 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 00:35:30,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:35:30 BoogieIcfgContainer [2020-11-30 00:35:30,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:35:30,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:35:30,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:35:30,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:35:30,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:35:29" (1/3) ... [2020-11-30 00:35:30,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479c4dfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:35:30, skipping insertion in model container [2020-11-30 00:35:30,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:29" (2/3) ... [2020-11-30 00:35:30,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@479c4dfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:35:30, skipping insertion in model container [2020-11-30 00:35:30,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:35:30" (3/3) ... [2020-11-30 00:35:30,094 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b2_o3.c [2020-11-30 00:35:30,105 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:35:30,109 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 00:35:30,127 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 00:35:30,168 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:35:30,168 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 00:35:30,168 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:35:30,168 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:35:30,169 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:35:30,169 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:35:30,169 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:35:30,169 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:35:30,187 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-30 00:35:30,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 00:35:30,193 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:35:30,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:35:30,195 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:35:30,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:35:30,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1818828162, now seen corresponding path program 1 times [2020-11-30 00:35:30,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:35:30,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247349386] [2020-11-30 00:35:30,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:35:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:30,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:35:30,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247349386] [2020-11-30 00:35:30,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:35:30,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:35:30,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54625655] [2020-11-30 00:35:30,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:35:30,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:35:30,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:35:30,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:35:30,553 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-11-30 00:35:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:35:30,639 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-11-30 00:35:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:35:30,641 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-30 00:35:30,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:35:30,662 INFO L225 Difference]: With dead ends: 37 [2020-11-30 00:35:30,665 INFO L226 Difference]: Without dead ends: 23 [2020-11-30 00:35:30,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:35:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-30 00:35:30,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-30 00:35:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 00:35:30,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-30 00:35:30,745 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2020-11-30 00:35:30,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:35:30,746 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-30 00:35:30,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:35:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-30 00:35:30,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 00:35:30,750 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:35:30,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:35:30,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:35:30,752 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:35:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:35:30,754 INFO L82 PathProgramCache]: Analyzing trace with hash -554629661, now seen corresponding path program 1 times [2020-11-30 00:35:30,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:35:30,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733378666] [2020-11-30 00:35:30,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:35:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:30,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:31,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:35:31,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733378666] [2020-11-30 00:35:31,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:35:31,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:35:31,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606524717] [2020-11-30 00:35:31,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:35:31,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:35:31,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:35:31,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:35:31,068 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-11-30 00:35:31,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:35:31,108 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-11-30 00:35:31,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:35:31,112 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-30 00:35:31,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:35:31,114 INFO L225 Difference]: With dead ends: 41 [2020-11-30 00:35:31,114 INFO L226 Difference]: Without dead ends: 29 [2020-11-30 00:35:31,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:35:31,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-30 00:35:31,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-11-30 00:35:31,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 00:35:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-11-30 00:35:31,131 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2020-11-30 00:35:31,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:35:31,133 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-11-30 00:35:31,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:35:31,134 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-11-30 00:35:31,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 00:35:31,136 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:35:31,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:35:31,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 00:35:31,137 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:35:31,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:35:31,139 INFO L82 PathProgramCache]: Analyzing trace with hash -526000510, now seen corresponding path program 1 times [2020-11-30 00:35:31,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:35:31,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932831193] [2020-11-30 00:35:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:35:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:31,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:31,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:35:31,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932831193] [2020-11-30 00:35:31,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:35:31,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-30 00:35:31,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354647363] [2020-11-30 00:35:31,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 00:35:31,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:35:31,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 00:35:31,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:35:31,426 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 8 states. [2020-11-30 00:35:31,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:35:31,514 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-11-30 00:35:31,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 00:35:31,515 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-11-30 00:35:31,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:35:31,516 INFO L225 Difference]: With dead ends: 33 [2020-11-30 00:35:31,517 INFO L226 Difference]: Without dead ends: 29 [2020-11-30 00:35:31,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:35:31,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-30 00:35:31,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-11-30 00:35:31,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 00:35:31,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-11-30 00:35:31,525 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2020-11-30 00:35:31,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:35:31,525 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-11-30 00:35:31,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 00:35:31,525 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-11-30 00:35:31,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 00:35:31,526 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:35:31,526 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:35:31,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 00:35:31,527 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:35:31,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:35:31,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1446075610, now seen corresponding path program 1 times [2020-11-30 00:35:31,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:35:31,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618135204] [2020-11-30 00:35:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:35:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:31,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:31,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:31,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 00:35:31,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618135204] [2020-11-30 00:35:31,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:35:31,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:35:31,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35263131] [2020-11-30 00:35:31,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:35:31,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:35:31,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:35:31,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:35:31,707 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-11-30 00:35:31,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:35:31,739 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-11-30 00:35:31,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:35:31,740 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-11-30 00:35:31,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:35:31,741 INFO L225 Difference]: With dead ends: 45 [2020-11-30 00:35:31,741 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 00:35:31,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:35:31,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 00:35:31,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-11-30 00:35:31,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-30 00:35:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-11-30 00:35:31,748 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2020-11-30 00:35:31,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:35:31,749 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-11-30 00:35:31,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:35:31,749 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-11-30 00:35:31,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 00:35:31,750 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:35:31,751 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:35:31,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 00:35:31,751 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:35:31,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:35:31,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1249562105, now seen corresponding path program 1 times [2020-11-30 00:35:31,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:35:31,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927449823] [2020-11-30 00:35:31,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:35:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:31,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:31,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:32,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:32,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 00:35:32,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927449823] [2020-11-30 00:35:32,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:35:32,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-30 00:35:32,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025360424] [2020-11-30 00:35:32,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 00:35:32,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:35:32,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 00:35:32,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:35:32,062 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-11-30 00:35:32,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:35:32,128 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-11-30 00:35:32,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 00:35:32,129 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-11-30 00:35:32,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:35:32,130 INFO L225 Difference]: With dead ends: 49 [2020-11-30 00:35:32,131 INFO L226 Difference]: Without dead ends: 37 [2020-11-30 00:35:32,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:35:32,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-30 00:35:32,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-11-30 00:35:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-30 00:35:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-11-30 00:35:32,140 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 24 [2020-11-30 00:35:32,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:35:32,140 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-11-30 00:35:32,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 00:35:32,140 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-11-30 00:35:32,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 00:35:32,141 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:35:32,142 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:35:32,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 00:35:32,142 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:35:32,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:35:32,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1278191256, now seen corresponding path program 1 times [2020-11-30 00:35:32,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:35:32,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581708913] [2020-11-30 00:35:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:35:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:32,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:32,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:32,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 00:35:32,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581708913] [2020-11-30 00:35:32,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323914106] [2020-11-30 00:35:32,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7b5fd6c-8533-47e7-a975-bb65803a38a0/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 [2020-11-30 00:35:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:32,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-30 00:35:32,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:35:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 00:35:32,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:35:32,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-30 00:35:32,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770311749] [2020-11-30 00:35:32,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 00:35:32,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:35:32,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 00:35:32,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-11-30 00:35:32,658 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 12 states. [2020-11-30 00:35:32,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:35:32,831 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-11-30 00:35:32,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 00:35:32,833 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-11-30 00:35:32,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:35:32,834 INFO L225 Difference]: With dead ends: 43 [2020-11-30 00:35:32,834 INFO L226 Difference]: Without dead ends: 39 [2020-11-30 00:35:32,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-11-30 00:35:32,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-30 00:35:32,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-11-30 00:35:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-30 00:35:32,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-11-30 00:35:32,842 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2020-11-30 00:35:32,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:35:32,842 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-11-30 00:35:32,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 00:35:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-11-30 00:35:32,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-30 00:35:32,853 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:35:32,853 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:35:33,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-30 00:35:33,055 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:35:33,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:35:33,055 INFO L82 PathProgramCache]: Analyzing trace with hash -769543567, now seen corresponding path program 1 times [2020-11-30 00:35:33,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:35:33,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244757279] [2020-11-30 00:35:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:35:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:33,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:33,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:33,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:33,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-30 00:35:33,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244757279] [2020-11-30 00:35:33,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:35:33,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-30 00:35:33,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201475713] [2020-11-30 00:35:33,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 00:35:33,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:35:33,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 00:35:33,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:35:33,268 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-11-30 00:35:33,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:35:33,349 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-11-30 00:35:33,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 00:35:33,350 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-11-30 00:35:33,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:35:33,352 INFO L225 Difference]: With dead ends: 55 [2020-11-30 00:35:33,352 INFO L226 Difference]: Without dead ends: 41 [2020-11-30 00:35:33,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:35:33,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-30 00:35:33,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-11-30 00:35:33,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-30 00:35:33,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-11-30 00:35:33,360 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 31 [2020-11-30 00:35:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:35:33,360 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-11-30 00:35:33,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 00:35:33,360 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-11-30 00:35:33,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-30 00:35:33,362 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:35:33,362 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:35:33,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-30 00:35:33,362 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:35:33,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:35:33,364 INFO L82 PathProgramCache]: Analyzing trace with hash -966057072, now seen corresponding path program 1 times [2020-11-30 00:35:33,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:35:33,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942800747] [2020-11-30 00:35:33,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:35:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:33,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:33,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:33,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:33,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:33,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-30 00:35:33,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942800747] [2020-11-30 00:35:33,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199081418] [2020-11-30 00:35:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7b5fd6c-8533-47e7-a975-bb65803a38a0/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 [2020-11-30 00:35:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:33,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-30 00:35:33,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:35:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-30 00:35:33,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:35:33,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-30 00:35:33,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241482336] [2020-11-30 00:35:33,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 00:35:33,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:35:33,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 00:35:33,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-11-30 00:35:33,824 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-11-30 00:35:33,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:35:33,993 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-11-30 00:35:33,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 00:35:33,994 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-11-30 00:35:33,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:35:33,995 INFO L225 Difference]: With dead ends: 61 [2020-11-30 00:35:33,995 INFO L226 Difference]: Without dead ends: 47 [2020-11-30 00:35:33,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-11-30 00:35:33,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-30 00:35:34,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-11-30 00:35:34,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-30 00:35:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-11-30 00:35:34,003 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 31 [2020-11-30 00:35:34,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:35:34,004 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-11-30 00:35:34,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 00:35:34,004 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-11-30 00:35:34,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-30 00:35:34,006 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:35:34,006 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:35:34,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:35:34,207 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:35:34,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:35:34,208 INFO L82 PathProgramCache]: Analyzing trace with hash 441045678, now seen corresponding path program 2 times [2020-11-30 00:35:34,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:35:34,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410970950] [2020-11-30 00:35:34,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:35:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:34,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:34,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:34,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:34,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:34,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:35:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-30 00:35:34,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410970950] [2020-11-30 00:35:34,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702412029] [2020-11-30 00:35:34,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7b5fd6c-8533-47e7-a975-bb65803a38a0/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 [2020-11-30 00:35:34,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:35:34,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:35:34,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-30 00:35:34,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:35:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-30 00:35:34,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:35:34,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-11-30 00:35:34,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978209996] [2020-11-30 00:35:34,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 00:35:34,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:35:34,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 00:35:34,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-11-30 00:35:34,927 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 18 states. [2020-11-30 00:35:35,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:35:35,115 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2020-11-30 00:35:35,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 00:35:35,116 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-11-30 00:35:35,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:35:35,116 INFO L225 Difference]: With dead ends: 55 [2020-11-30 00:35:35,116 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 00:35:35,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2020-11-30 00:35:35,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 00:35:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 00:35:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 00:35:35,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 00:35:35,118 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2020-11-30 00:35:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:35:35,118 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:35:35,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 00:35:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 00:35:35,118 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 00:35:35,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:35:35,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 00:35:35,338 INFO L274 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-11-30 00:35:35,338 INFO L274 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-11-30 00:35:35,338 INFO L274 CegarLoopResult]: For program point id2EXIT(lines 16 21) no Hoare annotation was computed. [2020-11-30 00:35:35,339 INFO L277 CegarLoopResult]: At program point id2ENTRY(lines 16 21) the Hoare annotation is: true [2020-11-30 00:35:35,339 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-11-30 00:35:35,339 INFO L274 CegarLoopResult]: For program point id2FINAL(lines 16 21) no Hoare annotation was computed. [2020-11-30 00:35:35,339 INFO L277 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: true [2020-11-30 00:35:35,339 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 00:35:35,339 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-30 00:35:35,339 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 00:35:35,339 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-30 00:35:35,339 INFO L274 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-11-30 00:35:35,339 INFO L274 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-11-30 00:35:35,340 INFO L277 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: true [2020-11-30 00:35:35,340 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-11-30 00:35:35,340 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-30 00:35:35,340 INFO L274 CegarLoopResult]: For program point L23(lines 23 29) no Hoare annotation was computed. [2020-11-30 00:35:35,340 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-11-30 00:35:35,340 INFO L274 CegarLoopResult]: For program point idFINAL(lines 9 14) no Hoare annotation was computed. [2020-11-30 00:35:35,340 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-30 00:35:35,341 INFO L277 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: true [2020-11-30 00:35:35,341 INFO L274 CegarLoopResult]: For program point idEXIT(lines 9 14) no Hoare annotation was computed. [2020-11-30 00:35:35,341 INFO L274 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-11-30 00:35:35,341 INFO L274 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-11-30 00:35:35,341 INFO L277 CegarLoopResult]: At program point idENTRY(lines 9 14) the Hoare annotation is: true [2020-11-30 00:35:35,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:35:35 BoogieIcfgContainer [2020-11-30 00:35:35,347 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:35:35,347 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:35:35,347 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:35:35,348 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:35:35,348 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:35:30" (3/4) ... [2020-11-30 00:35:35,351 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 00:35:35,358 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2020-11-30 00:35:35,359 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2020-11-30 00:35:35,363 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-30 00:35:35,364 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 00:35:35,364 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 00:35:35,364 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 00:35:35,418 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f7b5fd6c-8533-47e7-a975-bb65803a38a0/bin/uautomizer/witness.graphml [2020-11-30 00:35:35,418 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:35:35,420 INFO L168 Benchmark]: Toolchain (without parser) took 6034.09 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 60.8 MB in the beginning and 69.5 MB in the end (delta: -8.7 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:35:35,421 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 92.3 MB. Free memory was 49.9 MB in the beginning and 49.9 MB in the end (delta: 37.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:35:35,422 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.13 ms. Allocated memory is still 92.3 MB. Free memory was 60.6 MB in the beginning and 69.7 MB in the end (delta: -9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:35:35,422 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.84 ms. Allocated memory is still 92.3 MB. Free memory was 69.7 MB in the beginning and 68.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:35:35,423 INFO L168 Benchmark]: Boogie Preprocessor took 24.50 ms. Allocated memory is still 92.3 MB. Free memory was 68.4 MB in the beginning and 67.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:35:35,424 INFO L168 Benchmark]: RCFGBuilder took 337.14 ms. Allocated memory is still 92.3 MB. Free memory was 67.3 MB in the beginning and 55.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 00:35:35,424 INFO L168 Benchmark]: TraceAbstraction took 5262.06 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 54.6 MB in the beginning and 71.6 MB in the end (delta: -17.0 MB). Peak memory consumption was 26.2 MB. Max. memory is 16.1 GB. [2020-11-30 00:35:35,425 INFO L168 Benchmark]: Witness Printer took 71.35 ms. Allocated memory is still 134.2 MB. Free memory was 71.6 MB in the beginning and 69.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:35:35,428 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 92.3 MB. Free memory was 49.9 MB in the beginning and 49.9 MB in the end (delta: 37.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 291.13 ms. Allocated memory is still 92.3 MB. Free memory was 60.6 MB in the beginning and 69.7 MB in the end (delta: -9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.84 ms. Allocated memory is still 92.3 MB. Free memory was 69.7 MB in the beginning and 68.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.50 ms. Allocated memory is still 92.3 MB. Free memory was 68.4 MB in the beginning and 67.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 337.14 ms. Allocated memory is still 92.3 MB. Free memory was 67.3 MB in the beginning and 55.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5262.06 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 54.6 MB in the beginning and 71.6 MB in the end (delta: -17.0 MB). Peak memory consumption was 26.2 MB. Max. memory is 16.1 GB. * Witness Printer took 71.35 ms. Allocated memory is still 134.2 MB. Free memory was 71.6 MB in the beginning and 69.5 MB 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: 4]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.1s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 37 SDslu, 1428 SDs, 0 SdLazy, 376 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 234 GetRequests, 159 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 22 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 5 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 309 NumberOfCodeBlocks, 309 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 297 ConstructedInterpolants, 0 QuantifiedInterpolants, 27933 SizeOfPredicates, 11 NumberOfNonLiveVariables, 288 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 65/93 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...