./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/underapprox_2-1.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_2-1.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 2879b5362dad4ee344e02d12e11f7b45d4f36399 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 22:20:20,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:20:20,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:20:20,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:20:20,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:20:20,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:20:20,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:20:20,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:20:20,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:20:20,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:20:20,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:20:20,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:20:20,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:20:20,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:20:20,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:20:20,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:20:20,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:20:20,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:20:20,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:20:20,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:20:20,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:20:20,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:20:20,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:20:20,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:20:20,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:20:20,980 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:20:20,980 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:20:20,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:20:20,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:20:20,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:20:20,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:20:20,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:20:20,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:20:20,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:20:20,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:20:20,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:20:20,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:20:21,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:20:21,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:20:21,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:20:21,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:20:21,007 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:20:21,066 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:20:21,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:20:21,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:20:21,070 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:20:21,070 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:20:21,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:20:21,071 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:20:21,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:20:21,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:20:21,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:20:21,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:20:21,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:20:21,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:20:21,073 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:20:21,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:20:21,074 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:20:21,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:20:21,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:20:21,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:20:21,075 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:20:21,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:20:21,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:20:21,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:20:21,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:20:21,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:20:21,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:20:21,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:20:21,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:20:21,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:20:21,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2879b5362dad4ee344e02d12e11f7b45d4f36399 [2020-10-25 22:20:21,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:20:21,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:20:21,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:20:21,600 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:20:21,601 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:20:21,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c [2020-10-25 22:20:21,708 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac9f34c72/75aad295fe284d4e9ab58dc95563d48e/FLAGdb1a58fd4 [2020-10-25 22:20:22,429 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:20:22,431 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c [2020-10-25 22:20:22,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac9f34c72/75aad295fe284d4e9ab58dc95563d48e/FLAGdb1a58fd4 [2020-10-25 22:20:22,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac9f34c72/75aad295fe284d4e9ab58dc95563d48e [2020-10-25 22:20:22,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:20:22,783 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:20:22,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:20:22,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:20:22,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:20:22,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:20:22" (1/1) ... [2020-10-25 22:20:22,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d0cfabf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:22, skipping insertion in model container [2020-10-25 22:20:22,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:20:22" (1/1) ... [2020-10-25 22:20:22,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:20:22,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:20:23,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:20:23,129 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:20:23,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:20:23,175 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:20:23,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:23 WrapperNode [2020-10-25 22:20:23,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:20:23,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:20:23,180 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:20:23,180 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:20:23,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:23" (1/1) ... [2020-10-25 22:20:23,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:23" (1/1) ... [2020-10-25 22:20:23,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:20:23,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:20:23,235 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:20:23,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:20:23,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:23" (1/1) ... [2020-10-25 22:20:23,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:23" (1/1) ... [2020-10-25 22:20:23,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:23" (1/1) ... [2020-10-25 22:20:23,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:23" (1/1) ... [2020-10-25 22:20:23,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:23" (1/1) ... [2020-10-25 22:20:23,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:23" (1/1) ... [2020-10-25 22:20:23,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:23" (1/1) ... [2020-10-25 22:20:23,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:20:23,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:20:23,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:20:23,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:20:23,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:23" (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 22:20:23,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:20:23,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:20:23,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:20:23,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:20:23,650 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:20:23,650 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-25 22:20:23,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:20:23 BoogieIcfgContainer [2020-10-25 22:20:23,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:20:23,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:20:23,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:20:23,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:20:23,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:20:22" (1/3) ... [2020-10-25 22:20:23,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2327a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:20:23, skipping insertion in model container [2020-10-25 22:20:23,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:20:23" (2/3) ... [2020-10-25 22:20:23,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2327a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:20:23, skipping insertion in model container [2020-10-25 22:20:23,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:20:23" (3/3) ... [2020-10-25 22:20:23,663 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2020-10-25 22:20:23,679 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:20:23,685 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:20:23,716 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:20:23,788 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:20:23,789 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:20:23,789 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:20:23,789 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:20:23,789 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:20:23,789 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:20:23,789 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:20:23,790 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:20:23,832 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-10-25 22:20:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-25 22:20:23,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:20:23,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-25 22:20:23,839 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:20:23,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:20:23,847 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-10-25 22:20:23,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:20:23,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780672520] [2020-10-25 22:20:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:20:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:20:24,116 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 22:20:24,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780672520] [2020-10-25 22:20:24,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:20:24,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 22:20:24,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938708929] [2020-10-25 22:20:24,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:20:24,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:20:24,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:20:24,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:20:24,144 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2020-10-25 22:20:24,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:20:24,201 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2020-10-25 22:20:24,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:20:24,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-25 22:20:24,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:20:24,213 INFO L225 Difference]: With dead ends: 19 [2020-10-25 22:20:24,214 INFO L226 Difference]: Without dead ends: 8 [2020-10-25 22:20:24,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:20:24,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-25 22:20:24,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-25 22:20:24,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-25 22:20:24,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-10-25 22:20:24,255 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-10-25 22:20:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:20:24,256 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-10-25 22:20:24,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:20:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-10-25 22:20:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 22:20:24,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:20:24,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:20:24,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:20:24,258 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:20:24,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:20:24,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2020-10-25 22:20:24,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:20:24,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947013601] [2020-10-25 22:20:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:20:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:20:24,386 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 22:20:24,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947013601] [2020-10-25 22:20:24,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33000067] [2020-10-25 22:20:24,387 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 22:20:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:20:24,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-25 22:20:24,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:20:24,480 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 22:20:24,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:20:24,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-10-25 22:20:24,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936529279] [2020-10-25 22:20:24,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 22:20:24,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:20:24,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 22:20:24,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:20:24,485 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 6 states. [2020-10-25 22:20:24,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:20:24,521 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-10-25 22:20:24,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:20:24,522 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-10-25 22:20:24,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:20:24,523 INFO L225 Difference]: With dead ends: 13 [2020-10-25 22:20:24,523 INFO L226 Difference]: Without dead ends: 9 [2020-10-25 22:20:24,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:20:24,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-10-25 22:20:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-10-25 22:20:24,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-25 22:20:24,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-10-25 22:20:24,534 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-10-25 22:20:24,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:20:24,534 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-10-25 22:20:24,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 22:20:24,534 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-10-25 22:20:24,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-25 22:20:24,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:20:24,535 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-10-25 22:20:24,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-25 22:20:24,748 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:20:24,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:20:24,750 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2020-10-25 22:20:24,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:20:24,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118859542] [2020-10-25 22:20:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:20:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:20:24,882 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 22:20:24,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118859542] [2020-10-25 22:20:24,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767376375] [2020-10-25 22:20:24,883 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 22:20:24,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:20:24,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:20:24,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-25 22:20:24,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:20:25,093 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 22:20:25,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:20:25,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-10-25 22:20:25,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873030182] [2020-10-25 22:20:25,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 22:20:25,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:20:25,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 22:20:25,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-25 22:20:25,099 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 7 states. [2020-10-25 22:20:25,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:20:25,187 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-10-25 22:20:25,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 22:20:25,188 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2020-10-25 22:20:25,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:20:25,189 INFO L225 Difference]: With dead ends: 14 [2020-10-25 22:20:25,189 INFO L226 Difference]: Without dead ends: 10 [2020-10-25 22:20:25,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-25 22:20:25,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-10-25 22:20:25,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-10-25 22:20:25,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-25 22:20:25,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-10-25 22:20:25,193 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-10-25 22:20:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:20:25,194 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-10-25 22:20:25,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 22:20:25,194 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-10-25 22:20:25,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-25 22:20:25,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:20:25,195 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2020-10-25 22:20:25,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:20:25,396 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:20:25,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:20:25,398 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 3 times [2020-10-25 22:20:25,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:20:25,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393000676] [2020-10-25 22:20:25,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:20:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:20:25,568 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 22:20:25,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393000676] [2020-10-25 22:20:25,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101534142] [2020-10-25 22:20:25,569 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 22:20:25,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-25 22:20:25,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:20:25,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-25 22:20:25,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:20:25,693 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 22:20:25,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:20:25,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-10-25 22:20:25,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171201841] [2020-10-25 22:20:25,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-25 22:20:25,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:20:25,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-25 22:20:25,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:20:25,696 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2020-10-25 22:20:25,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:20:25,746 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-10-25 22:20:25,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 22:20:25,747 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2020-10-25 22:20:25,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:20:25,748 INFO L225 Difference]: With dead ends: 15 [2020-10-25 22:20:25,748 INFO L226 Difference]: Without dead ends: 11 [2020-10-25 22:20:25,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:20:25,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-10-25 22:20:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-10-25 22:20:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-25 22:20:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-10-25 22:20:25,753 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-10-25 22:20:25,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:20:25,754 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-10-25 22:20:25,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-25 22:20:25,754 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-10-25 22:20:25,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-25 22:20:25,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:20:25,755 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2020-10-25 22:20:25,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:20:25,967 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:20:25,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:20:25,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 4 times [2020-10-25 22:20:25,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:20:25,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485930018] [2020-10-25 22:20:25,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:20:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:20:26,088 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 22:20:26,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485930018] [2020-10-25 22:20:26,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134224000] [2020-10-25 22:20:26,091 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 22:20:26,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 22:20:26,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:20:26,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-25 22:20:26,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:20:26,248 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 22:20:26,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:20:26,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-10-25 22:20:26,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5095088] [2020-10-25 22:20:26,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-25 22:20:26,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:20:26,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-25 22:20:26,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:20:26,251 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 9 states. [2020-10-25 22:20:26,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:20:26,327 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-10-25 22:20:26,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 22:20:26,328 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2020-10-25 22:20:26,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:20:26,328 INFO L225 Difference]: With dead ends: 16 [2020-10-25 22:20:26,329 INFO L226 Difference]: Without dead ends: 12 [2020-10-25 22:20:26,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:20:26,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-25 22:20:26,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-25 22:20:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-25 22:20:26,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-25 22:20:26,339 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-25 22:20:26,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:20:26,342 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-25 22:20:26,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-25 22:20:26,343 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-25 22:20:26,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 22:20:26,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:20:26,343 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2020-10-25 22:20:26,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:20:26,555 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:20:26,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:20:26,557 INFO L82 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 5 times [2020-10-25 22:20:26,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:20:26,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926480986] [2020-10-25 22:20:26,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:20:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:20:26,693 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 22:20:26,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926480986] [2020-10-25 22:20:26,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233117520] [2020-10-25 22:20:26,694 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 22:20:26,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-25 22:20:26,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:20:26,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-25 22:20:26,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:20:26,792 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 22:20:26,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:20:26,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-10-25 22:20:26,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126792623] [2020-10-25 22:20:26,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-25 22:20:26,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:20:26,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-25 22:20:26,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-25 22:20:26,795 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 10 states. [2020-10-25 22:20:26,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:20:26,859 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-10-25 22:20:26,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 22:20:26,859 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2020-10-25 22:20:26,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:20:26,860 INFO L225 Difference]: With dead ends: 17 [2020-10-25 22:20:26,860 INFO L226 Difference]: Without dead ends: 13 [2020-10-25 22:20:26,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-25 22:20:26,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-25 22:20:26,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-25 22:20:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-25 22:20:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-25 22:20:26,865 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-25 22:20:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:20:26,865 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-25 22:20:26,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-25 22:20:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-25 22:20:26,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-25 22:20:26,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:20:26,866 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2020-10-25 22:20:27,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-25 22:20:27,068 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:20:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:20:27,069 INFO L82 PathProgramCache]: Analyzing trace with hash -967103989, now seen corresponding path program 6 times [2020-10-25 22:20:27,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:20:27,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769978948] [2020-10-25 22:20:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:20:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:20:27,091 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:20:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:20:27,112 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:20:27,138 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 22:20:27,138 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:20:27,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-25 22:20:27,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:20:27 BoogieIcfgContainer [2020-10-25 22:20:27,166 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:20:27,167 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:20:27,167 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:20:27,167 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:20:27,168 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:20:23" (3/4) ... [2020-10-25 22:20:27,170 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 22:20:27,220 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:20:27,220 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:20:27,222 INFO L168 Benchmark]: Toolchain (without parser) took 4443.34 ms. Allocated memory was 41.9 MB in the beginning and 60.8 MB in the end (delta: 18.9 MB). Free memory was 18.8 MB in the beginning and 40.1 MB in the end (delta: -21.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:20:27,222 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 41.9 MB. Free memory is still 19.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:20:27,223 INFO L168 Benchmark]: CACSL2BoogieTranslator took 373.52 ms. Allocated memory is still 50.3 MB. Free memory was 35.6 MB in the beginning and 26.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-10-25 22:20:27,224 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.67 ms. Allocated memory is still 50.3 MB. Free memory was 26.6 MB in the beginning and 25.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:20:27,224 INFO L168 Benchmark]: Boogie Preprocessor took 37.97 ms. Allocated memory is still 50.3 MB. Free memory was 25.2 MB in the beginning and 24.2 MB in the end (delta: 951.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:20:27,225 INFO L168 Benchmark]: RCFGBuilder took 377.76 ms. Allocated memory is still 50.3 MB. Free memory was 24.2 MB in the beginning and 26.1 MB in the end (delta: -1.9 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-10-25 22:20:27,225 INFO L168 Benchmark]: TraceAbstraction took 3512.43 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 25.7 MB in the beginning and 42.2 MB in the end (delta: -16.5 MB). Peak memory consumption was 18.7 MB. Max. memory is 16.1 GB. [2020-10-25 22:20:27,226 INFO L168 Benchmark]: Witness Printer took 53.00 ms. Allocated memory is still 60.8 MB. Free memory was 42.2 MB in the beginning and 40.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:20:27,230 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 41.9 MB. Free memory is still 19.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 373.52 ms. Allocated memory is still 50.3 MB. Free memory was 35.6 MB in the beginning and 26.6 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 51.67 ms. Allocated memory is still 50.3 MB. Free memory was 26.6 MB in the beginning and 25.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.97 ms. Allocated memory is still 50.3 MB. Free memory was 25.2 MB in the beginning and 24.2 MB in the end (delta: 951.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 377.76 ms. Allocated memory is still 50.3 MB. Free memory was 24.2 MB in the beginning and 26.1 MB in the end (delta: -1.9 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3512.43 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 25.7 MB in the beginning and 42.2 MB in the end (delta: -16.5 MB). Peak memory consumption was 18.7 MB. Max. memory is 16.1 GB. * Witness Printer took 53.00 ms. Allocated memory is still 60.8 MB. Free memory was 42.2 MB in the beginning and 40.1 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_2-1.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: 3.3s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 2 SDslu, 102 SDs, 0 SdLazy, 199 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 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, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 2686 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...