./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/underapprox_1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/underapprox_1-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 517a91fa544aee14f6c894b24f388accaee55d2d .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 22:20:15,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:20:15,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:20:15,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:20:15,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:20:15,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:20:15,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:20:15,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:20:15,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:20:15,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:20:15,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:20:15,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:20:15,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:20:15,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:20:16,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:20:16,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:20:16,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:20:16,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:20:16,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:20:16,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:20:16,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:20:16,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:20:16,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:20:16,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:20:16,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:20:16,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:20:16,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:20:16,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:20:16,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:20:16,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:20:16,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:20:16,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:20:16,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:20:16,034 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:20:16,035 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:20:16,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:20:16,036 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:20:16,037 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:20:16,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:20:16,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:20:16,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:20:16,040 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:20:16,078 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:20:16,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:20:16,081 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:20:16,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:20:16,081 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:20:16,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:20:16,082 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:20:16,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:20:16,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:20:16,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:20:16,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:20:16,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:20:16,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:20:16,084 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:20:16,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:20:16,084 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:20:16,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:20:16,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:20:16,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:20:16,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:20:16,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:20:16,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:20:16,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:20:16,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:20:16,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:20:16,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:20:16,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:20:16,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:20:16,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:20:16,088 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 517a91fa544aee14f6c894b24f388accaee55d2d [2020-10-25 22:20:16,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:20:16,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:20:16,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:20:16,605 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:20:16,606 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:20:16,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/underapprox_1-1.c [2020-10-25 22:20:16,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84aa4c8f7/b4216782270e4080831f3769674bc5c5/FLAG2f7d9db07 [2020-10-25 22:20:17,411 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:20:17,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/underapprox_1-1.c [2020-10-25 22:20:17,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84aa4c8f7/b4216782270e4080831f3769674bc5c5/FLAG2f7d9db07 [2020-10-25 22:20:17,792 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84aa4c8f7/b4216782270e4080831f3769674bc5c5 [2020-10-25 22:20:17,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:20:17,804 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:20:17,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:20:17,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:20:17,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:20:17,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:20:17" (1/1) ... [2020-10-25 22:20:17,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e808d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:17, skipping insertion in model container [2020-10-25 22:20:17,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:20:17" (1/1) ... [2020-10-25 22:20:17,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:20:17,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:20:18,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:20:18,051 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:20:18,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:20:18,085 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:20:18,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:18 WrapperNode [2020-10-25 22:20:18,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:20:18,088 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:20:18,088 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:20:18,088 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:20:18,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:18" (1/1) ... [2020-10-25 22:20:18,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:18" (1/1) ... [2020-10-25 22:20:18,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:20:18,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:20:18,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:20:18,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:20:18,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:18" (1/1) ... [2020-10-25 22:20:18,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:18" (1/1) ... [2020-10-25 22:20:18,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:18" (1/1) ... [2020-10-25 22:20:18,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:18" (1/1) ... [2020-10-25 22:20:18,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:18" (1/1) ... [2020-10-25 22:20:18,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:18" (1/1) ... [2020-10-25 22:20:18,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:18" (1/1) ... [2020-10-25 22:20:18,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:20:18,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:20:18,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:20:18,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:20:18,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-25 22:20:18,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:20:18,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:20:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:20:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:20:18,617 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:20:18,618 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-25 22:20:18,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:20:18 BoogieIcfgContainer [2020-10-25 22:20:18,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:20:18,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:20:18,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:20:18,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:20:18,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:20:17" (1/3) ... [2020-10-25 22:20:18,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9cf8ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:20:18, skipping insertion in model container [2020-10-25 22:20:18,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:18" (2/3) ... [2020-10-25 22:20:18,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9cf8ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:20:18, skipping insertion in model container [2020-10-25 22:20:18,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:20:18" (3/3) ... [2020-10-25 22:20:18,633 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2020-10-25 22:20:18,647 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:20:18,654 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:20:18,670 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:20:18,719 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:20:18,719 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:20:18,720 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:20:18,720 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:20:18,720 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:20:18,720 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:20:18,721 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:20:18,721 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:20:18,743 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-10-25 22:20:18,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-25 22:20:18,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:20:18,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-25 22:20:18,753 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:20:18,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:20:18,764 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-10-25 22:20:18,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:20:18,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235488101] [2020-10-25 22:20:18,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:20:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:20:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:20:19,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235488101] [2020-10-25 22:20:19,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:20:19,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 22:20:19,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322625895] [2020-10-25 22:20:19,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 22:20:19,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:20:19,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 22:20:19,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:20:19,122 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-10-25 22:20:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:20:19,178 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2020-10-25 22:20:19,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 22:20:19,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-10-25 22:20:19,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:20:19,197 INFO L225 Difference]: With dead ends: 19 [2020-10-25 22:20:19,197 INFO L226 Difference]: Without dead ends: 8 [2020-10-25 22:20:19,212 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 [2020-10-25 22:20:19,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-25 22:20:19,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-25 22:20:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-25 22:20:19,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-10-25 22:20:19,255 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-10-25 22:20:19,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:20:19,255 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-10-25 22:20:19,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 22:20:19,255 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-10-25 22:20:19,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 22:20:19,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:20:19,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:20:19,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:20:19,257 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:20:19,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:20:19,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2020-10-25 22:20:19,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:20:19,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919603186] [2020-10-25 22:20:19,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:20:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:20:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:20:19,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919603186] [2020-10-25 22:20:19,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866669912] [2020-10-25 22:20:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-25 22:20:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:20:19,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-25 22:20:19,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:20:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:20:19,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:20:19,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-25 22:20:19,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942074458] [2020-10-25 22:20:19,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 22:20:19,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:20:19,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 22:20:19,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-25 22:20:19,459 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2020-10-25 22:20:19,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:20:19,477 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-10-25 22:20:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:20:19,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-10-25 22:20:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:20:19,478 INFO L225 Difference]: With dead ends: 13 [2020-10-25 22:20:19,478 INFO L226 Difference]: Without dead ends: 9 [2020-10-25 22:20:19,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-25 22:20:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-10-25 22:20:19,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-10-25 22:20:19,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-25 22:20:19,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-10-25 22:20:19,483 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-10-25 22:20:19,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:20:19,483 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-10-25 22:20:19,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 22:20:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-10-25 22:20:19,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-25 22:20:19,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:20:19,484 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-10-25 22:20:19,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-25 22:20:19,686 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:20:19,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:20:19,687 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2020-10-25 22:20:19,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:20:19,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897410270] [2020-10-25 22:20:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:20:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:20:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:20:19,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897410270] [2020-10-25 22:20:19,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502980952] [2020-10-25 22:20:19,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-25 22:20:19,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:20:19,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:20:19,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-25 22:20:19,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:20:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:20:20,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:20:20,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-25 22:20:20,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722509120] [2020-10-25 22:20:20,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 22:20:20,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:20:20,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 22:20:20,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:20:20,024 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2020-10-25 22:20:20,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:20:20,065 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-10-25 22:20:20,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 22:20:20,068 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-10-25 22:20:20,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:20:20,068 INFO L225 Difference]: With dead ends: 14 [2020-10-25 22:20:20,068 INFO L226 Difference]: Without dead ends: 10 [2020-10-25 22:20:20,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:20:20,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-10-25 22:20:20,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-10-25 22:20:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-25 22:20:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-10-25 22:20:20,076 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-10-25 22:20:20,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:20:20,077 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-10-25 22:20:20,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 22:20:20,077 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-10-25 22:20:20,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-25 22:20:20,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:20:20,078 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2020-10-25 22:20:20,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:20:20,292 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:20:20,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:20:20,294 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 3 times [2020-10-25 22:20:20,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:20:20,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501567554] [2020-10-25 22:20:20,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:20:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:20:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:20:20,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501567554] [2020-10-25 22:20:20,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408228542] [2020-10-25 22:20:20,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-25 22:20:20,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-25 22:20:20,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:20:20,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-25 22:20:20,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:20:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:20:20,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:20:20,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-25 22:20:20,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829148897] [2020-10-25 22:20:20,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 22:20:20,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:20:20,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 22:20:20,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-25 22:20:20,529 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2020-10-25 22:20:20,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:20:20,561 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-10-25 22:20:20,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 22:20:20,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-10-25 22:20:20,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:20:20,563 INFO L225 Difference]: With dead ends: 15 [2020-10-25 22:20:20,563 INFO L226 Difference]: Without dead ends: 11 [2020-10-25 22:20:20,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-25 22:20:20,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-10-25 22:20:20,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-10-25 22:20:20,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-25 22:20:20,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-10-25 22:20:20,568 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-10-25 22:20:20,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:20:20,568 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-10-25 22:20:20,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 22:20:20,569 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-10-25 22:20:20,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-25 22:20:20,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:20:20,569 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2020-10-25 22:20:20,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:20:20,781 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:20:20,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:20:20,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 4 times [2020-10-25 22:20:20,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:20:20,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782973883] [2020-10-25 22:20:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:20:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:20:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:20:20,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782973883] [2020-10-25 22:20:20,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536268981] [2020-10-25 22:20:20,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-25 22:20:21,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 22:20:21,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:20:21,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-25 22:20:21,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:20:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:20:21,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:20:21,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-25 22:20:21,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861407939] [2020-10-25 22:20:21,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-25 22:20:21,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:20:21,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-25 22:20:21,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:20:21,087 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2020-10-25 22:20:21,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:20:21,128 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-10-25 22:20:21,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 22:20:21,129 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-10-25 22:20:21,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:20:21,130 INFO L225 Difference]: With dead ends: 16 [2020-10-25 22:20:21,130 INFO L226 Difference]: Without dead ends: 12 [2020-10-25 22:20:21,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:20:21,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-25 22:20:21,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-25 22:20:21,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-25 22:20:21,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-25 22:20:21,135 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-25 22:20:21,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:20:21,136 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-25 22:20:21,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-25 22:20:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-25 22:20:21,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 22:20:21,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:20:21,137 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2020-10-25 22:20:21,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:20:21,339 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:20:21,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:20:21,341 INFO L82 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 5 times [2020-10-25 22:20:21,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:20:21,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141514323] [2020-10-25 22:20:21,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:20:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:20:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:20:21,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141514323] [2020-10-25 22:20:21,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929276555] [2020-10-25 22:20:21,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-25 22:20:21,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-25 22:20:21,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:20:21,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-25 22:20:21,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:20:21,565 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:20:21,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:20:21,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-25 22:20:21,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235827320] [2020-10-25 22:20:21,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-25 22:20:21,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:20:21,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-25 22:20:21,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:20:21,568 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2020-10-25 22:20:21,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:20:21,616 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-10-25 22:20:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 22:20:21,617 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-10-25 22:20:21,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:20:21,617 INFO L225 Difference]: With dead ends: 17 [2020-10-25 22:20:21,617 INFO L226 Difference]: Without dead ends: 13 [2020-10-25 22:20:21,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:20:21,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-25 22:20:21,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-25 22:20:21,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-25 22:20:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-25 22:20:21,622 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-25 22:20:21,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:20:21,623 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-25 22:20:21,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-25 22:20:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-25 22:20:21,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-25 22:20:21,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:20:21,624 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2020-10-25 22:20:21,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-25 22:20:21,835 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:20:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:20:21,837 INFO L82 PathProgramCache]: Analyzing trace with hash -967103989, now seen corresponding path program 6 times [2020-10-25 22:20:21,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:20:21,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207151001] [2020-10-25 22:20:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:20:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:20:21,859 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:20:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:20:21,878 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:20:21,897 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 22:20:21,898 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:20:21,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-25 22:20:21,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:20:21 BoogieIcfgContainer [2020-10-25 22:20:21,930 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:20:21,930 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:20:21,931 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:20:21,931 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:20:21,932 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:20:18" (3/4) ... [2020-10-25 22:20:21,934 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 22:20:21,986 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:20:21,986 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:20:21,989 INFO L168 Benchmark]: Toolchain (without parser) took 4189.26 ms. Allocated memory was 48.2 MB in the beginning and 71.3 MB in the end (delta: 23.1 MB). Free memory was 25.3 MB in the beginning and 30.7 MB in the end (delta: -5.4 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. [2020-10-25 22:20:21,989 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 35.7 MB. Free memory was 20.0 MB in the beginning and 20.0 MB in the end (delta: 26.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:20:21,990 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.93 ms. Allocated memory is still 48.2 MB. Free memory was 24.7 MB in the beginning and 26.9 MB in the end (delta: -2.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-10-25 22:20:21,991 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.51 ms. Allocated memory is still 48.2 MB. Free memory was 26.9 MB in the beginning and 25.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:20:21,991 INFO L168 Benchmark]: Boogie Preprocessor took 23.32 ms. Allocated memory is still 48.2 MB. Free memory was 25.5 MB in the beginning and 24.6 MB in the end (delta: 853.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:20:21,992 INFO L168 Benchmark]: RCFGBuilder took 471.54 ms. Allocated memory is still 48.2 MB. Free memory was 24.5 MB in the beginning and 26.0 MB in the end (delta: -1.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2020-10-25 22:20:21,993 INFO L168 Benchmark]: TraceAbstraction took 3305.77 ms. Allocated memory was 48.2 MB in the beginning and 71.3 MB in the end (delta: 23.1 MB). Free memory was 25.5 MB in the beginning and 32.8 MB in the end (delta: -7.3 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:20:21,994 INFO L168 Benchmark]: Witness Printer took 56.02 ms. Allocated memory is still 71.3 MB. Free memory was 32.8 MB in the beginning and 30.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:20:21,997 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 35.7 MB. Free memory was 20.0 MB in the beginning and 20.0 MB in the end (delta: 26.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 280.93 ms. Allocated memory is still 48.2 MB. Free memory was 24.7 MB in the beginning and 26.9 MB in the end (delta: -2.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.51 ms. Allocated memory is still 48.2 MB. Free memory was 26.9 MB in the beginning and 25.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.32 ms. Allocated memory is still 48.2 MB. Free memory was 25.5 MB in the beginning and 24.6 MB in the end (delta: 853.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 471.54 ms. Allocated memory is still 48.2 MB. Free memory was 24.5 MB in the beginning and 26.0 MB in the end (delta: -1.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3305.77 ms. Allocated memory was 48.2 MB in the beginning and 71.3 MB in the end (delta: 23.1 MB). Free memory was 25.5 MB in the beginning and 32.8 MB in the end (delta: -7.3 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. * Witness Printer took 56.02 ms. Allocated memory is still 71.3 MB. Free memory was 32.8 MB in the beginning and 30.7 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: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] unsigned int x = 0; [L14] unsigned int y = 1; [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND FALSE !(x < 6) [L6] COND TRUE !(cond) [L3] __assert_fail("0", "underapprox_1-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.1s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 0 SDslu, 91 SDs, 0 SdLazy, 135 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=6, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 2551 SizeOfPredicates, 5 NumberOfNonLiveVariables, 290 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/70 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 incorrect! Received shutdown request...