./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/nested9.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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-invgen/nested9.i -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 b0874b2316aff3266709463f0d72702527bf3a82 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 10:57:42,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 10:57:42,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 10:57:42,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 10:57:42,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 10:57:42,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 10:57:42,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 10:57:42,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 10:57:42,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 10:57:42,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 10:57:42,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 10:57:42,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 10:57:42,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 10:57:42,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 10:57:42,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 10:57:42,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 10:57:42,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 10:57:42,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 10:57:42,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 10:57:42,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 10:57:42,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 10:57:42,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 10:57:42,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 10:57:42,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 10:57:42,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 10:57:42,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 10:57:42,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 10:57:42,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 10:57:42,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 10:57:42,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 10:57:42,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 10:57:42,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 10:57:42,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 10:57:42,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 10:57:42,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 10:57:42,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 10:57:42,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 10:57:42,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 10:57:42,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 10:57:42,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 10:57:43,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 10:57:43,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 10:57:43,041 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 10:57:43,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 10:57:43,042 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 10:57:43,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 10:57:43,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 10:57:43,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 10:57:43,044 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 10:57:43,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 10:57:43,045 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 10:57:43,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 10:57:43,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 10:57:43,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 10:57:43,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 10:57:43,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 10:57:43,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 10:57:43,047 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 10:57:43,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 10:57:43,047 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 10:57:43,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 10:57:43,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 10:57:43,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 10:57:43,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 10:57:43,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:57:43,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 10:57:43,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 10:57:43,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 10:57:43,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 10:57:43,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 10:57:43,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 10:57:43,049 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 10:57:43,050 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0874b2316aff3266709463f0d72702527bf3a82 [2021-08-29 10:57:43,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 10:57:43,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 10:57:43,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 10:57:43,427 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 10:57:43,428 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 10:57:43,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/nested9.i [2021-08-29 10:57:43,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e712556a0/808848cc971d4fb4a0bfa6c15a6a15da/FLAGce304e51d [2021-08-29 10:57:43,833 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 10:57:43,834 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/nested9.i [2021-08-29 10:57:43,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e712556a0/808848cc971d4fb4a0bfa6c15a6a15da/FLAGce304e51d [2021-08-29 10:57:43,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e712556a0/808848cc971d4fb4a0bfa6c15a6a15da [2021-08-29 10:57:43,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 10:57:43,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 10:57:43,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 10:57:43,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 10:57:43,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 10:57:43,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:57:43" (1/1) ... [2021-08-29 10:57:43,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78895d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:43, skipping insertion in model container [2021-08-29 10:57:43,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:57:43" (1/1) ... [2021-08-29 10:57:43,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 10:57:43,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 10:57:44,046 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/nested9.i[893,906] [2021-08-29 10:57:44,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:57:44,069 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 10:57:44,119 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/nested9.i[893,906] [2021-08-29 10:57:44,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:57:44,142 INFO L208 MainTranslator]: Completed translation [2021-08-29 10:57:44,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:44 WrapperNode [2021-08-29 10:57:44,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 10:57:44,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 10:57:44,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 10:57:44,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 10:57:44,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:44" (1/1) ... [2021-08-29 10:57:44,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:44" (1/1) ... [2021-08-29 10:57:44,178 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 10:57:44,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 10:57:44,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 10:57:44,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 10:57:44,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:44" (1/1) ... [2021-08-29 10:57:44,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:44" (1/1) ... [2021-08-29 10:57:44,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:44" (1/1) ... [2021-08-29 10:57:44,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:44" (1/1) ... [2021-08-29 10:57:44,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:44" (1/1) ... [2021-08-29 10:57:44,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:44" (1/1) ... [2021-08-29 10:57:44,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:44" (1/1) ... [2021-08-29 10:57:44,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 10:57:44,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 10:57:44,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 10:57:44,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 10:57:44,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:44" (1/1) ... [2021-08-29 10:57:44,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:57:44,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:57:44,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 10:57:44,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 10:57:44,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 10:57:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 10:57:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 10:57:44,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 10:57:44,457 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 10:57:44,458 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-08-29 10:57:44,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:57:44 BoogieIcfgContainer [2021-08-29 10:57:44,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 10:57:44,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 10:57:44,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 10:57:44,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 10:57:44,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:57:43" (1/3) ... [2021-08-29 10:57:44,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f32d7da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:57:44, skipping insertion in model container [2021-08-29 10:57:44,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:57:44" (2/3) ... [2021-08-29 10:57:44,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f32d7da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:57:44, skipping insertion in model container [2021-08-29 10:57:44,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:57:44" (3/3) ... [2021-08-29 10:57:44,469 INFO L111 eAbstractionObserver]: Analyzing ICFG nested9.i [2021-08-29 10:57:44,477 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 10:57:44,477 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 10:57:44,535 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 10:57:44,543 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 10:57:44,543 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 10:57:44,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:44,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-29 10:57:44,563 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:57:44,563 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:57:44,564 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:57:44,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:57:44,568 INFO L82 PathProgramCache]: Analyzing trace with hash -331449283, now seen corresponding path program 1 times [2021-08-29 10:57:44,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:57:44,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495954864] [2021-08-29 10:57:44,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:44,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:57:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:57:44,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:57:44,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495954864] [2021-08-29 10:57:44,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495954864] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:57:44,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 10:57:44,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-29 10:57:44,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019554994] [2021-08-29 10:57:44,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 10:57:44,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:57:44,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 10:57:44,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-29 10:57:44,804 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:45,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:57:45,021 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2021-08-29 10:57:45,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 10:57:45,023 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-29 10:57:45,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:57:45,029 INFO L225 Difference]: With dead ends: 67 [2021-08-29 10:57:45,029 INFO L226 Difference]: Without dead ends: 42 [2021-08-29 10:57:45,032 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.02ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-29 10:57:45,034 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.36ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 143.39ms IncrementalHoareTripleChecker+Time [2021-08-29 10:57:45,035 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 149 Unknown, 0 Unchecked, 2.36ms Time], IncrementalHoareTripleChecker [7 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 143.39ms Time] [2021-08-29 10:57:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-29 10:57:45,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 24. [2021-08-29 10:57:45,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:45,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-08-29 10:57:45,062 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 12 [2021-08-29 10:57:45,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:57:45,063 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-08-29 10:57:45,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:45,063 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-08-29 10:57:45,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 10:57:45,064 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:57:45,064 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:57:45,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 10:57:45,065 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:57:45,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:57:45,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1296087111, now seen corresponding path program 1 times [2021-08-29 10:57:45,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:57:45,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031747890] [2021-08-29 10:57:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:45,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:57:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:57:45,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:57:45,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031747890] [2021-08-29 10:57:45,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031747890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:57:45,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724713634] [2021-08-29 10:57:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:45,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:57:45,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:57:45,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:57:45,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 10:57:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:45,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-29 10:57:45,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:57:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:57:45,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 10:57:45,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724713634] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:57:45,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-29 10:57:45,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-08-29 10:57:45,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483108495] [2021-08-29 10:57:45,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 10:57:45,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:57:45,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 10:57:45,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-29 10:57:45,512 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:45,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:57:45,657 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2021-08-29 10:57:45,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 10:57:45,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-29 10:57:45,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:57:45,660 INFO L225 Difference]: With dead ends: 44 [2021-08-29 10:57:45,660 INFO L226 Difference]: Without dead ends: 42 [2021-08-29 10:57:45,663 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 101.11ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-29 10:57:45,664 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.17ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94.67ms IncrementalHoareTripleChecker+Time [2021-08-29 10:57:45,666 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 145 Unknown, 0 Unchecked, 3.17ms Time], IncrementalHoareTripleChecker [7 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 94.67ms Time] [2021-08-29 10:57:45,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-29 10:57:45,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 18. [2021-08-29 10:57:45,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-08-29 10:57:45,685 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 15 [2021-08-29 10:57:45,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:57:45,685 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-08-29 10:57:45,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:45,685 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-08-29 10:57:45,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 10:57:45,686 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:57:45,686 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:57:45,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 10:57:45,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:57:45,909 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:57:45,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:57:45,910 INFO L82 PathProgramCache]: Analyzing trace with hash -70902445, now seen corresponding path program 1 times [2021-08-29 10:57:45,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:57:45,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378699932] [2021-08-29 10:57:45,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:45,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:57:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:57:46,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:57:46,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378699932] [2021-08-29 10:57:46,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378699932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:57:46,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143617307] [2021-08-29 10:57:46,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:46,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:57:46,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:57:46,029 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:57:46,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 10:57:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:46,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-29 10:57:46,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:57:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 10:57:46,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 10:57:46,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143617307] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:57:46,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-29 10:57:46,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-08-29 10:57:46,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64285004] [2021-08-29 10:57:46,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 10:57:46,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:57:46,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 10:57:46,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-29 10:57:46,140 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:57:46,179 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2021-08-29 10:57:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 10:57:46,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-29 10:57:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:57:46,180 INFO L225 Difference]: With dead ends: 32 [2021-08-29 10:57:46,180 INFO L226 Difference]: Without dead ends: 21 [2021-08-29 10:57:46,181 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 40.84ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-29 10:57:46,182 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.56ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.06ms IncrementalHoareTripleChecker+Time [2021-08-29 10:57:46,182 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 53 Unknown, 0 Unchecked, 1.56ms Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 28.06ms Time] [2021-08-29 10:57:46,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-29 10:57:46,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-08-29 10:57:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-08-29 10:57:46,189 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2021-08-29 10:57:46,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:57:46,189 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-08-29 10:57:46,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:46,190 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-08-29 10:57:46,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-29 10:57:46,190 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:57:46,191 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:57:46,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 10:57:46,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-29 10:57:46,405 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:57:46,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:57:46,406 INFO L82 PathProgramCache]: Analyzing trace with hash 29741143, now seen corresponding path program 1 times [2021-08-29 10:57:46,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:57:46,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825518926] [2021-08-29 10:57:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:46,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:57:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:57:46,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:57:46,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825518926] [2021-08-29 10:57:46,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825518926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:57:46,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949459920] [2021-08-29 10:57:46,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:46,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:57:46,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:57:46,480 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:57:46,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 10:57:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:46,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 10:57:46,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:57:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:57:46,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:57:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:57:46,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949459920] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:57:46,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:57:46,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-08-29 10:57:46,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901925183] [2021-08-29 10:57:46,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 10:57:46,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:57:46,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 10:57:46,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-29 10:57:46,767 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:46,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:57:46,936 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2021-08-29 10:57:46,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-29 10:57:46,937 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-29 10:57:46,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:57:46,938 INFO L225 Difference]: With dead ends: 46 [2021-08-29 10:57:46,938 INFO L226 Difference]: Without dead ends: 35 [2021-08-29 10:57:46,938 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 123.11ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-29 10:57:46,939 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.41ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.12ms IncrementalHoareTripleChecker+Time [2021-08-29 10:57:46,939 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 152 Unknown, 0 Unchecked, 2.41ms Time], IncrementalHoareTripleChecker [24 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 83.12ms Time] [2021-08-29 10:57:46,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-29 10:57:46,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-08-29 10:57:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-08-29 10:57:46,945 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2021-08-29 10:57:46,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:57:46,946 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-08-29 10:57:46,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-08-29 10:57:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-29 10:57:46,947 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:57:46,947 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:57:46,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-29 10:57:47,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:57:47,148 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:57:47,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:57:47,148 INFO L82 PathProgramCache]: Analyzing trace with hash 48602575, now seen corresponding path program 1 times [2021-08-29 10:57:47,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:57:47,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818897531] [2021-08-29 10:57:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:47,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:57:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-29 10:57:47,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:57:47,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818897531] [2021-08-29 10:57:47,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818897531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:57:47,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080278161] [2021-08-29 10:57:47,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:47,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:57:47,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:57:47,241 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:57:47,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 10:57:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:47,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-29 10:57:47,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:57:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-29 10:57:47,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 10:57:47,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080278161] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:57:47,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-29 10:57:47,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-08-29 10:57:47,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540173717] [2021-08-29 10:57:47,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-29 10:57:47,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:57:47,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-29 10:57:47,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-29 10:57:47,401 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:47,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:57:47,457 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2021-08-29 10:57:47,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 10:57:47,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-29 10:57:47,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:57:47,459 INFO L225 Difference]: With dead ends: 48 [2021-08-29 10:57:47,459 INFO L226 Difference]: Without dead ends: 31 [2021-08-29 10:57:47,460 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 67.51ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-29 10:57:47,461 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.41ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.11ms IncrementalHoareTripleChecker+Time [2021-08-29 10:57:47,462 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.41ms Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 32.11ms Time] [2021-08-29 10:57:47,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-29 10:57:47,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-08-29 10:57:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:47,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-08-29 10:57:47,473 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2021-08-29 10:57:47,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:57:47,474 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-08-29 10:57:47,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:47,474 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-08-29 10:57:47,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-29 10:57:47,475 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:57:47,475 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:57:47,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 10:57:47,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:57:47,692 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:57:47,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:57:47,692 INFO L82 PathProgramCache]: Analyzing trace with hash 67888881, now seen corresponding path program 2 times [2021-08-29 10:57:47,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:57:47,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269757925] [2021-08-29 10:57:47,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:57:47,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:57:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:57:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-29 10:57:47,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:57:47,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269757925] [2021-08-29 10:57:47,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269757925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:57:47,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107070206] [2021-08-29 10:57:47,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 10:57:47,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:57:47,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:57:47,797 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:57:47,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 10:57:47,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-29 10:57:47,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 10:57:47,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 10:57:47,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:57:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-29 10:57:47,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:57:48,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-29 10:57:48,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107070206] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:57:48,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:57:48,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2021-08-29 10:57:48,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941772709] [2021-08-29 10:57:48,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-29 10:57:48,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:57:48,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-29 10:57:48,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-29 10:57:48,008 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:57:48,145 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2021-08-29 10:57:48,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 10:57:48,146 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-29 10:57:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:57:48,146 INFO L225 Difference]: With dead ends: 49 [2021-08-29 10:57:48,146 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 10:57:48,147 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 121.15ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-08-29 10:57:48,147 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.72ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.55ms IncrementalHoareTripleChecker+Time [2021-08-29 10:57:48,148 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 127 Unknown, 0 Unchecked, 0.72ms Time], IncrementalHoareTripleChecker [20 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 57.55ms Time] [2021-08-29 10:57:48,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 10:57:48,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 10:57:48,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:48,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 10:57:48,149 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-08-29 10:57:48,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:57:48,149 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 10:57:48,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:57:48,150 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 10:57:48,150 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 10:57:48,152 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 10:57:48,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-29 10:57:48,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:57:48,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 10:57:48,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:57:48,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:57:48,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:57:48,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:57:48,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:57:48,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:57:48,611 INFO L858 garLoopResultBuilder]: For program point L35-2(lines 35 37) no Hoare annotation was computed. [2021-08-29 10:57:48,611 INFO L854 garLoopResultBuilder]: At program point L35-3(lines 35 37) the Hoare annotation is: (let ((.cse2 (* 2 ULTIMATE.start_main_~i~0))) (let ((.cse0 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0)) (.cse1 (<= .cse2 ULTIMATE.start_main_~j~0))) (or (and .cse0 (= ULTIMATE.start_main_~i~0 0) .cse1 (<= ULTIMATE.start_main_~j~0 .cse2)) (and (<= ULTIMATE.start_main_~i~0 1) .cse0 (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0)) .cse1) (and (<= ULTIMATE.start_main_~j~0 (+ (* 2 ULTIMATE.start_main_~n~0) ULTIMATE.start_main_~i~0 1)) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 1 ULTIMATE.start_main_~i~0) .cse0 .cse1)))) [2021-08-29 10:57:48,611 INFO L858 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2021-08-29 10:57:48,611 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-08-29 10:57:48,612 INFO L854 garLoopResultBuilder]: At program point L36-2(lines 36 37) the Hoare annotation is: (let ((.cse0 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0)) (.cse1 (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0))) (.cse2 (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0))) (or (and (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0 .cse1 .cse2) (and (<= ULTIMATE.start_main_~i~0 1) (<= (div (* ULTIMATE.start_main_~j~0 (- 1)) (- 2)) ULTIMATE.start_main_~k~0) .cse0 .cse1 (<= ULTIMATE.start_main_~k~0 (div ULTIMATE.start_main_~j~0 2)) .cse2))) [2021-08-29 10:57:48,612 INFO L858 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2021-08-29 10:57:48,612 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 10:57:48,612 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 10:57:48,612 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 10:57:48,612 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-08-29 10:57:48,612 INFO L858 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2021-08-29 10:57:48,612 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 10:57:48,612 INFO L858 garLoopResultBuilder]: For program point L33-1(line 33) no Hoare annotation was computed. [2021-08-29 10:57:48,613 INFO L861 garLoopResultBuilder]: At program point L38(lines 25 40) the Hoare annotation is: true [2021-08-29 10:57:48,613 INFO L858 garLoopResultBuilder]: For program point L34-2(lines 34 37) no Hoare annotation was computed. [2021-08-29 10:57:48,613 INFO L854 garLoopResultBuilder]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse2 (* 2 ULTIMATE.start_main_~i~0)) (.cse3 (* 2 ULTIMATE.start_main_~n~0))) (let ((.cse0 (<= .cse2 (+ .cse3 2))) (.cse1 (<= 1 ULTIMATE.start_main_~i~0))) (or (and (<= ULTIMATE.start_main_~i~0 1) .cse0 .cse1 (<= ULTIMATE.start_main_~j~0 .cse2)) (and (<= ULTIMATE.start_main_~j~0 (+ .cse3 ULTIMATE.start_main_~i~0 1)) .cse0 (<= 2 ULTIMATE.start_main_~n~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse1) (= ULTIMATE.start_main_~i~0 0)))) [2021-08-29 10:57:48,613 INFO L858 garLoopResultBuilder]: For program point L30(line 30) no Hoare annotation was computed. [2021-08-29 10:57:48,613 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-08-29 10:57:48,613 INFO L854 garLoopResultBuilder]: At program point L18-2(lines 1 40) the Hoare annotation is: (and (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0) (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0)) (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0)) [2021-08-29 10:57:48,613 INFO L861 garLoopResultBuilder]: At program point L39(lines 25 40) the Hoare annotation is: true [2021-08-29 10:57:48,617 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 10:57:48,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 10:57:48 BoogieIcfgContainer [2021-08-29 10:57:48,629 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 10:57:48,630 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 10:57:48,630 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 10:57:48,630 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 10:57:48,631 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:57:44" (3/4) ... [2021-08-29 10:57:48,633 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 10:57:48,640 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-29 10:57:48,640 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 10:57:48,640 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 10:57:48,641 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 10:57:48,665 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 10:57:48,665 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 10:57:48,666 INFO L158 Benchmark]: Toolchain (without parser) took 4800.55ms. Allocated memory was 48.2MB in the beginning and 75.5MB in the end (delta: 27.3MB). Free memory was 24.1MB in the beginning and 47.7MB in the end (delta: -23.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 10:57:48,666 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 48.2MB. Free memory was 30.6MB in the beginning and 30.6MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:57:48,666 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.89ms. Allocated memory was 48.2MB in the beginning and 62.9MB in the end (delta: 14.7MB). Free memory was 23.9MB in the beginning and 46.0MB in the end (delta: -22.1MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. [2021-08-29 10:57:48,666 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.29ms. Allocated memory is still 62.9MB. Free memory was 45.9MB in the beginning and 44.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:57:48,667 INFO L158 Benchmark]: Boogie Preprocessor took 37.22ms. Allocated memory is still 62.9MB. Free memory was 44.4MB in the beginning and 43.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:57:48,667 INFO L158 Benchmark]: RCFGBuilder took 242.75ms. Allocated memory is still 62.9MB. Free memory was 43.3MB in the beginning and 34.8MB in the end (delta: 8.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-29 10:57:48,667 INFO L158 Benchmark]: TraceAbstraction took 4168.07ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 34.2MB in the beginning and 50.4MB in the end (delta: -16.2MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. [2021-08-29 10:57:48,667 INFO L158 Benchmark]: Witness Printer took 35.30ms. Allocated memory is still 75.5MB. Free memory was 50.4MB in the beginning and 47.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 10:57:48,669 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 48.2MB. Free memory was 30.6MB in the beginning and 30.6MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 271.89ms. Allocated memory was 48.2MB in the beginning and 62.9MB in the end (delta: 14.7MB). Free memory was 23.9MB in the beginning and 46.0MB in the end (delta: -22.1MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.29ms. Allocated memory is still 62.9MB. Free memory was 45.9MB in the beginning and 44.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 37.22ms. Allocated memory is still 62.9MB. Free memory was 44.4MB in the beginning and 43.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 242.75ms. Allocated memory is still 62.9MB. Free memory was 43.3MB in the beginning and 34.8MB in the end (delta: 8.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4168.07ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 34.2MB in the beginning and 50.4MB in the end (delta: -16.2MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. * Witness Printer took 35.30ms. Allocated memory is still 75.5MB. Free memory was 50.4MB in the beginning and 47.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4083.68ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 12.18ms, AutomataDifference: 832.61ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 234.45ms, InitialAbstractionConstructionTime: 10.49ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 167 SdHoareTripleChecker+Valid, 438.90ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 167 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 347.54ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 202 mSDsCounter, 63 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 626 IncrementalHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 63 mSolverCounterUnsat, 0 mSDtfsCounter, 626 mSolverCounterSat, 10.63ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 198 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 523.73ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=4, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 54.81ms AutomataMinimizationTime, 6 MinimizatonAttempts, 51 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 27 NumberOfFragments, 176 HoareAnnotationTreeSize, 6 FomulaSimplifications, 1309 FormulaSimplificationTreeSizeReduction, 83.76ms HoareSimplificationTime, 6 FomulaSimplificationsInter, 145 FormulaSimplificationTreeSizeReductionInter, 144.04ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 45.42ms SsaConstructionTime, 178.90ms SatisfiabilityAnalysisTime, 1330.44ms InterpolantComputationTime, 210 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 242 ConstructedInterpolants, 0 QuantifiedInterpolants, 738 SizeOfPredicates, 21 NumberOfNonLiveVariables, 364 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 77/108 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: ((1 <= cond && i < n) && j < 3 * i) && 2 * i <= j - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((i < n && i == 0) && 2 * i <= j) && j <= 2 * i) || (((i <= 1 && i < n) && j < 3 * i) && 2 * i <= j)) || ((((j <= 2 * n + i + 1 && 1 <= cond) && 1 <= i) && i < n) && 2 * i <= j) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((1 <= cond && i < n) && j < 3 * i) && 2 * i <= j) || (((((i <= 1 && j * -1 / -2 <= k) && i < n) && j < 3 * i) && k <= j / 2) && 2 * i <= j) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((i <= 1 && 2 * i <= 2 * n + 2) && 1 <= i) && j <= 2 * i) || ((((j <= 2 * n + i + 1 && 2 * i <= 2 * n + 2) && 2 <= n) && 1 <= cond) && 1 <= i)) || i == 0 RESULT: Ultimate proved your program to be correct! [2021-08-29 10:57:48,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...