./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/string_concat-noarr.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/string_concat-noarr.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 a16c5bc7f1ed4f9266e4e27b0a7ec7a93876c12a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 10:58:08,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 10:58:08,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 10:58:08,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 10:58:08,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 10:58:08,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 10:58:08,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 10:58:08,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 10:58:08,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 10:58:08,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 10:58:08,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 10:58:09,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 10:58:09,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 10:58:09,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 10:58:09,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 10:58:09,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 10:58:09,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 10:58:09,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 10:58:09,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 10:58:09,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 10:58:09,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 10:58:09,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 10:58:09,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 10:58:09,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 10:58:09,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 10:58:09,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 10:58:09,029 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 10:58:09,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 10:58:09,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 10:58:09,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 10:58:09,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 10:58:09,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 10:58:09,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 10:58:09,034 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 10:58:09,035 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 10:58:09,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 10:58:09,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 10:58:09,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 10:58:09,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 10:58:09,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 10:58:09,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 10:58:09,039 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 10:58:09,065 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 10:58:09,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 10:58:09,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 10:58:09,067 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 10:58:09,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 10:58:09,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 10:58:09,069 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 10:58:09,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 10:58:09,070 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 10:58:09,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 10:58:09,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 10:58:09,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 10:58:09,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 10:58:09,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 10:58:09,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 10:58:09,071 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 10:58:09,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 10:58:09,071 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 10:58:09,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 10:58:09,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 10:58:09,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 10:58:09,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 10:58:09,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:58:09,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 10:58:09,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 10:58:09,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 10:58:09,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 10:58:09,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 10:58:09,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 10:58:09,073 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 10:58:09,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a16c5bc7f1ed4f9266e4e27b0a7ec7a93876c12a [2021-08-29 10:58:09,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 10:58:09,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 10:58:09,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 10:58:09,459 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 10:58:09,459 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 10:58:09,460 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2021-08-29 10:58:09,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea3b82113/6b650fbcb8fd4273aaffe52f45cb4d89/FLAG7e521f02f [2021-08-29 10:58:09,822 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 10:58:09,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2021-08-29 10:58:09,827 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea3b82113/6b650fbcb8fd4273aaffe52f45cb4d89/FLAG7e521f02f [2021-08-29 10:58:10,243 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea3b82113/6b650fbcb8fd4273aaffe52f45cb4d89 [2021-08-29 10:58:10,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 10:58:10,246 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 10:58:10,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 10:58:10,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 10:58:10,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 10:58:10,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:58:10" (1/1) ... [2021-08-29 10:58:10,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7deb25ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:58:10, skipping insertion in model container [2021-08-29 10:58:10,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:58:10" (1/1) ... [2021-08-29 10:58:10,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 10:58:10,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 10:58:10,355 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/string_concat-noarr.i[893,906] [2021-08-29 10:58:10,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:58:10,367 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 10:58:10,375 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/string_concat-noarr.i[893,906] [2021-08-29 10:58:10,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:58:10,415 INFO L208 MainTranslator]: Completed translation [2021-08-29 10:58:10,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:58:10 WrapperNode [2021-08-29 10:58:10,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 10:58:10,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 10:58:10,424 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 10:58:10,424 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 10:58:10,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:58:10" (1/1) ... [2021-08-29 10:58:10,434 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:58:10" (1/1) ... [2021-08-29 10:58:10,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 10:58:10,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 10:58:10,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 10:58:10,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 10:58:10,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:58:10" (1/1) ... [2021-08-29 10:58:10,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:58:10" (1/1) ... [2021-08-29 10:58:10,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:58:10" (1/1) ... [2021-08-29 10:58:10,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:58:10" (1/1) ... [2021-08-29 10:58:10,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:58:10" (1/1) ... [2021-08-29 10:58:10,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:58:10" (1/1) ... [2021-08-29 10:58:10,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:58:10" (1/1) ... [2021-08-29 10:58:10,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 10:58:10,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 10:58:10,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 10:58:10,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 10:58:10,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:58:10" (1/1) ... [2021-08-29 10:58:10,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:58:10,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:58:10,526 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 10:58:10,569 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 10:58:10,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 10:58:10,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 10:58:10,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 10:58:10,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 10:58:10,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 10:58:10,715 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-29 10:58:10,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:58:10 BoogieIcfgContainer [2021-08-29 10:58:10,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 10:58:10,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 10:58:10,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 10:58:10,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 10:58:10,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:58:10" (1/3) ... [2021-08-29 10:58:10,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e1484f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:58:10, skipping insertion in model container [2021-08-29 10:58:10,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:58:10" (2/3) ... [2021-08-29 10:58:10,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e1484f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:58:10, skipping insertion in model container [2021-08-29 10:58:10,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:58:10" (3/3) ... [2021-08-29 10:58:10,724 INFO L111 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2021-08-29 10:58:10,730 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 10:58:10,730 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 10:58:10,766 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 10:58:10,773 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 10:58:10,773 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 10:58:10,787 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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 10:58:10,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-29 10:58:10,798 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:58:10,799 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:58:10,800 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:58:10,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:58:10,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1270421808, now seen corresponding path program 1 times [2021-08-29 10:58:10,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:58:10,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807270302] [2021-08-29 10:58:10,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:58:10,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:58:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:58:10,944 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 10:58:10,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:58:10,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807270302] [2021-08-29 10:58:10,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807270302] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:58:10,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 10:58:10,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 10:58:10,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478883934] [2021-08-29 10:58:10,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 10:58:10,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:58:10,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 10:58:10,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 10:58:10,970 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 10:58:11,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:58:11,029 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2021-08-29 10:58:11,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 10:58:11,032 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-08-29 10:58:11,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:58:11,036 INFO L225 Difference]: With dead ends: 29 [2021-08-29 10:58:11,037 INFO L226 Difference]: Without dead ends: 12 [2021-08-29 10:58:11,055 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 10:58:11,057 INFO L928 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.29ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.92ms IncrementalHoareTripleChecker+Time [2021-08-29 10:58:11,058 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 19 Unknown, 0 Unchecked, 0.29ms Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 49.92ms Time] [2021-08-29 10:58:11,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-08-29 10:58:11,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-08-29 10:58:11,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 10:58:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-08-29 10:58:11,089 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2021-08-29 10:58:11,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:58:11,090 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-08-29 10:58:11,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 10:58:11,090 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-08-29 10:58:11,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 10:58:11,090 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:58:11,091 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:58:11,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 10:58:11,091 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:58:11,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:58:11,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1947968043, now seen corresponding path program 1 times [2021-08-29 10:58:11,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:58:11,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947960857] [2021-08-29 10:58:11,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:58:11,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:58:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:58:11,185 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 10:58:11,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:58:11,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947960857] [2021-08-29 10:58:11,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947960857] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:58:11,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 10:58:11,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 10:58:11,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065137074] [2021-08-29 10:58:11,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 10:58:11,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:58:11,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 10:58:11,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 10:58:11,189 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 10:58:11,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:58:11,242 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-08-29 10:58:11,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 10:58:11,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2021-08-29 10:58:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:58:11,243 INFO L225 Difference]: With dead ends: 21 [2021-08-29 10:58:11,243 INFO L226 Difference]: Without dead ends: 17 [2021-08-29 10:58:11,244 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.21ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 10:58:11,245 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.49ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.66ms IncrementalHoareTripleChecker+Time [2021-08-29 10:58:11,261 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 38 Unknown, 0 Unchecked, 0.49ms Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 31.66ms Time] [2021-08-29 10:58:11,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-29 10:58:11,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2021-08-29 10:58:11,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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 10:58:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-08-29 10:58:11,264 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-08-29 10:58:11,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:58:11,265 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-08-29 10:58:11,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 10:58:11,265 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-08-29 10:58:11,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-29 10:58:11,266 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:58:11,266 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:58:11,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 10:58:11,266 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:58:11,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:58:11,267 INFO L82 PathProgramCache]: Analyzing trace with hash 653313584, now seen corresponding path program 1 times [2021-08-29 10:58:11,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:58:11,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303938808] [2021-08-29 10:58:11,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:58:11,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:58:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:58:11,309 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 10:58:11,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:58:11,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303938808] [2021-08-29 10:58:11,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303938808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:58:11,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805047245] [2021-08-29 10:58:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:58:11,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:58:11,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:58:11,311 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 10:58:11,312 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 10:58:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:58:11,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-29 10:58:11,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:58:11,414 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 10:58:11,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:58:11,466 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 10:58:11,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805047245] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:58:11,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:58:11,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-08-29 10:58:11,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36001671] [2021-08-29 10:58:11,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 10:58:11,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:58:11,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 10:58:11,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-29 10:58:11,480 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 10:58:11,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:58:11,552 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-08-29 10:58:11,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 10:58:11,552 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) Word has length 13 [2021-08-29 10:58:11,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:58:11,553 INFO L225 Difference]: With dead ends: 44 [2021-08-29 10:58:11,553 INFO L226 Difference]: Without dead ends: 36 [2021-08-29 10:58:11,554 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 41.74ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-29 10:58:11,554 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.87ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.48ms IncrementalHoareTripleChecker+Time [2021-08-29 10:58:11,555 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 86 Unknown, 0 Unchecked, 0.87ms Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 49.48ms Time] [2021-08-29 10:58:11,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-29 10:58:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2021-08-29 10:58:11,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 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 10:58:11,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-08-29 10:58:11,558 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 13 [2021-08-29 10:58:11,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:58:11,558 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-08-29 10:58:11,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 10:58:11,559 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-08-29 10:58:11,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-29 10:58:11,559 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:58:11,559 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:58:11,579 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 10:58:11,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:58:11,779 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:58:11,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:58:11,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1676362047, now seen corresponding path program 2 times [2021-08-29 10:58:11,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:58:11,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693028203] [2021-08-29 10:58:11,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:58:11,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:58:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:58:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:58:11,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:58:11,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693028203] [2021-08-29 10:58:11,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693028203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:58:11,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385796425] [2021-08-29 10:58:11,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 10:58:11,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:58:11,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:58:11,882 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 10:58:11,884 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 10:58:11,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 10:58:11,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 10:58:11,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-29 10:58:11,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:58:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:58:12,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:58:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:58:12,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385796425] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:58:12,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:58:12,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-08-29 10:58:12,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247719319] [2021-08-29 10:58:12,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-29 10:58:12,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:58:12,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-29 10:58:12,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-08-29 10:58:12,116 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 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 10:58:12,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:58:12,262 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2021-08-29 10:58:12,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-29 10:58:12,262 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 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 19 [2021-08-29 10:58:12,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:58:12,268 INFO L225 Difference]: With dead ends: 88 [2021-08-29 10:58:12,268 INFO L226 Difference]: Without dead ends: 74 [2021-08-29 10:58:12,269 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 109.84ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-08-29 10:58:12,269 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 92 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.16ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.75ms IncrementalHoareTripleChecker+Time [2021-08-29 10:58:12,270 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 0 Invalid, 161 Unknown, 0 Unchecked, 3.16ms Time], IncrementalHoareTripleChecker [46 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 88.75ms Time] [2021-08-29 10:58:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-29 10:58:12,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 47. [2021-08-29 10:58:12,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 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 10:58:12,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-08-29 10:58:12,274 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 19 [2021-08-29 10:58:12,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:58:12,274 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-08-29 10:58:12,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 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 10:58:12,275 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-08-29 10:58:12,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-29 10:58:12,275 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:58:12,275 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:58:12,296 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 10:58:12,493 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,SelfDestructingSolverStorable3 [2021-08-29 10:58:12,494 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:58:12,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:58:12,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1240264099, now seen corresponding path program 3 times [2021-08-29 10:58:12,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:58:12,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472850955] [2021-08-29 10:58:12,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:58:12,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:58:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:58:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:58:12,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:58:12,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472850955] [2021-08-29 10:58:12,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472850955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:58:12,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477692668] [2021-08-29 10:58:12,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 10:58:12,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:58:12,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:58:12,608 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 10:58:12,609 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 10:58:12,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-29 10:58:12,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 10:58:12,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-29 10:58:12,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:58:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:58:12,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:58:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:58:13,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477692668] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:58:13,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:58:13,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2021-08-29 10:58:13,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930395027] [2021-08-29 10:58:13,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-29 10:58:13,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:58:13,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-29 10:58:13,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2021-08-29 10:58:13,006 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 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 10:58:13,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:58:13,387 INFO L93 Difference]: Finished difference Result 208 states and 242 transitions. [2021-08-29 10:58:13,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-29 10:58:13,387 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 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 31 [2021-08-29 10:58:13,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:58:13,390 INFO L225 Difference]: With dead ends: 208 [2021-08-29 10:58:13,390 INFO L226 Difference]: Without dead ends: 182 [2021-08-29 10:58:13,390 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 384.00ms TimeCoverageRelationStatistics Valid=497, Invalid=985, Unknown=0, NotChecked=0, Total=1482 [2021-08-29 10:58:13,391 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 193 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 155.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.47ms SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 206.73ms IncrementalHoareTripleChecker+Time [2021-08-29 10:58:13,391 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 0 Invalid, 314 Unknown, 0 Unchecked, 2.47ms Time], IncrementalHoareTripleChecker [102 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 206.73ms Time] [2021-08-29 10:58:13,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-08-29 10:58:13,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 89. [2021-08-29 10:58:13,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 88 states have internal predecessors, (101), 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 10:58:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2021-08-29 10:58:13,398 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 31 [2021-08-29 10:58:13,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:58:13,399 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2021-08-29 10:58:13,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 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 10:58:13,399 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2021-08-29 10:58:13,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-29 10:58:13,400 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:58:13,400 INFO L513 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:58:13,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 10:58:13,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:58:13,615 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:58:13,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:58:13,615 INFO L82 PathProgramCache]: Analyzing trace with hash 351142503, now seen corresponding path program 4 times [2021-08-29 10:58:13,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:58:13,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313403748] [2021-08-29 10:58:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:58:13,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:58:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:58:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:58:13,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:58:13,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313403748] [2021-08-29 10:58:13,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313403748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:58:14,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644660037] [2021-08-29 10:58:14,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 10:58:14,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:58:14,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:58:14,001 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 10:58:14,002 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 10:58:14,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 10:58:14,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 10:58:14,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-29 10:58:14,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:58:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:58:14,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:58:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:58:14,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644660037] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:58:14,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:58:14,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2021-08-29 10:58:14,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057949474] [2021-08-29 10:58:14,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-29 10:58:14,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:58:14,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-29 10:58:14,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2021-08-29 10:58:14,840 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 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 10:58:15,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:58:15,640 INFO L93 Difference]: Finished difference Result 556 states and 626 transitions. [2021-08-29 10:58:15,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-29 10:58:15,640 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 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 55 [2021-08-29 10:58:15,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:58:15,642 INFO L225 Difference]: With dead ends: 556 [2021-08-29 10:58:15,642 INFO L226 Difference]: Without dead ends: 506 [2021-08-29 10:58:15,644 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1100.19ms TimeCoverageRelationStatistics Valid=1853, Invalid=3697, Unknown=0, NotChecked=0, Total=5550 [2021-08-29 10:58:15,644 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 709 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 248.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.97ms SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 309.10ms IncrementalHoareTripleChecker+Time [2021-08-29 10:58:15,644 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 0 Invalid, 661 Unknown, 0 Unchecked, 3.97ms Time], IncrementalHoareTripleChecker [310 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 309.10ms Time] [2021-08-29 10:58:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-08-29 10:58:15,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 173. [2021-08-29 10:58:15,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.1453488372093024) internal successors, (197), 172 states have internal predecessors, (197), 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 10:58:15,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 197 transitions. [2021-08-29 10:58:15,655 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 197 transitions. Word has length 55 [2021-08-29 10:58:15,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:58:15,655 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 197 transitions. [2021-08-29 10:58:15,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 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 10:58:15,655 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 197 transitions. [2021-08-29 10:58:15,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-08-29 10:58:15,658 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:58:15,658 INFO L513 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:58:15,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-29 10:58:15,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:58:15,875 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:58:15,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:58:15,875 INFO L82 PathProgramCache]: Analyzing trace with hash -229570577, now seen corresponding path program 5 times [2021-08-29 10:58:15,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:58:15,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755321149] [2021-08-29 10:58:15,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:58:15,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:58:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:58:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:58:16,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:58:16,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755321149] [2021-08-29 10:58:16,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755321149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:58:16,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663592816] [2021-08-29 10:58:16,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-29 10:58:16,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:58:16,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:58:16,707 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 10:58:16,708 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 10:58:16,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-08-29 10:58:16,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 10:58:16,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-29 10:58:16,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:58:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:58:17,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:58:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:58:19,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663592816] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:58:19,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:58:19,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2021-08-29 10:58:19,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923770066] [2021-08-29 10:58:19,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-08-29 10:58:19,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:58:19,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-08-29 10:58:19,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4661, Invalid=5041, Unknown=0, NotChecked=0, Total=9702 [2021-08-29 10:58:19,261 INFO L87 Difference]: Start difference. First operand 173 states and 197 transitions. Second operand has 99 states, 99 states have (on average 2.121212121212121) internal successors, (210), 99 states have internal predecessors, (210), 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 10:58:22,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:58:22,200 INFO L93 Difference]: Finished difference Result 1684 states and 1826 transitions. [2021-08-29 10:58:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-08-29 10:58:22,201 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.121212121212121) internal successors, (210), 99 states have internal predecessors, (210), 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 103 [2021-08-29 10:58:22,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:58:22,222 INFO L225 Difference]: With dead ends: 1684 [2021-08-29 10:58:22,222 INFO L226 Difference]: Without dead ends: 1586 [2021-08-29 10:58:22,228 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 3694.82ms TimeCoverageRelationStatistics Valid=7157, Invalid=14305, Unknown=0, NotChecked=0, Total=21462 [2021-08-29 10:58:22,229 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1233 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 432.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.02ms SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 605.97ms IncrementalHoareTripleChecker+Time [2021-08-29 10:58:22,231 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1233 Valid, 0 Invalid, 1266 Unknown, 0 Unchecked, 7.02ms Time], IncrementalHoareTripleChecker [574 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 605.97ms Time] [2021-08-29 10:58:22,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-08-29 10:58:22,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 341. [2021-08-29 10:58:22,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.1441176470588235) internal successors, (389), 340 states have internal predecessors, (389), 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 10:58:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 389 transitions. [2021-08-29 10:58:22,287 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 389 transitions. Word has length 103 [2021-08-29 10:58:22,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:58:22,289 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 389 transitions. [2021-08-29 10:58:22,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.121212121212121) internal successors, (210), 99 states have internal predecessors, (210), 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 10:58:22,289 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 389 transitions. [2021-08-29 10:58:22,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-08-29 10:58:22,295 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:58:22,296 INFO L513 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:58:22,314 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 10:58:22,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:58:22,502 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:58:22,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:58:22,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1249213697, now seen corresponding path program 6 times [2021-08-29 10:58:22,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:58:22,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774817088] [2021-08-29 10:58:22,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:58:22,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:58:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:58:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:58:24,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:58:24,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774817088] [2021-08-29 10:58:24,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774817088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:58:24,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951503541] [2021-08-29 10:58:24,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-29 10:58:24,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:58:24,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:58:24,457 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:58:24,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-29 10:58:24,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2021-08-29 10:58:24,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 10:58:24,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 98 conjunts are in the unsatisfiable core [2021-08-29 10:58:24,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:58:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:58:25,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:58:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:58:32,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951503541] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:58:32,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:58:32,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 195 [2021-08-29 10:58:32,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722706376] [2021-08-29 10:58:32,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2021-08-29 10:58:32,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:58:32,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2021-08-29 10:58:32,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18533, Invalid=19297, Unknown=0, NotChecked=0, Total=37830 [2021-08-29 10:58:32,385 INFO L87 Difference]: Start difference. First operand 341 states and 389 transitions. Second operand has 195 states, 195 states have (on average 2.0615384615384613) internal successors, (402), 195 states have internal predecessors, (402), 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 10:58:58,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:58:58,408 INFO L93 Difference]: Finished difference Result 5668 states and 5954 transitions. [2021-08-29 10:58:58,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2021-08-29 10:58:58,409 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 2.0615384615384613) internal successors, (402), 195 states have internal predecessors, (402), 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 199 [2021-08-29 10:58:58,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:58:58,420 INFO L225 Difference]: With dead ends: 5668 [2021-08-29 10:58:58,421 INFO L226 Difference]: Without dead ends: 5474 [2021-08-29 10:58:58,426 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9784 ImplicationChecksByTransitivity, 13254.91ms TimeCoverageRelationStatistics Valid=28133, Invalid=56257, Unknown=0, NotChecked=0, Total=84390 [2021-08-29 10:58:58,427 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 3445 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 1704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1067.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.64ms SdHoareTripleChecker+Time, 1704 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1471.11ms IncrementalHoareTripleChecker+Time [2021-08-29 10:58:58,427 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [3445 Valid, 0 Invalid, 2999 Unknown, 0 Unchecked, 32.64ms Time], IncrementalHoareTripleChecker [1704 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 1471.11ms Time] [2021-08-29 10:58:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5474 states. [2021-08-29 10:58:58,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5474 to 677. [2021-08-29 10:58:58,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.143491124260355) internal successors, (773), 676 states have internal predecessors, (773), 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 10:58:58,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 773 transitions. [2021-08-29 10:58:58,449 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 773 transitions. Word has length 199 [2021-08-29 10:58:58,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:58:58,449 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 773 transitions. [2021-08-29 10:58:58,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 2.0615384615384613) internal successors, (402), 195 states have internal predecessors, (402), 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 10:58:58,449 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 773 transitions. [2021-08-29 10:58:58,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2021-08-29 10:58:58,453 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:58:58,453 INFO L513 BasicCegarLoop]: trace histogram [191, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:58:58,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-29 10:58:58,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:58:58,669 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:58:58,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:58:58,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1430993183, now seen corresponding path program 7 times [2021-08-29 10:58:58,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:58:58,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781196687] [2021-08-29 10:58:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:58:58,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:58:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:59:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 36290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:59:09,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:59:09,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781196687] [2021-08-29 10:59:09,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781196687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:59:09,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131967230] [2021-08-29 10:59:09,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-29 10:59:09,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:59:09,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:59:09,979 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:59:09,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-29 10:59:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:59:10,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 1565 conjuncts, 192 conjunts are in the unsatisfiable core [2021-08-29 10:59:10,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:59:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 36290 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:59:25,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 10:59:25,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131967230] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:59:25,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-29 10:59:25,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [193] imperfect sequences [194] total 385 [2021-08-29 10:59:25,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530811579] [2021-08-29 10:59:25,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-08-29 10:59:25,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:59:25,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-08-29 10:59:25,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37057, Invalid=110783, Unknown=0, NotChecked=0, Total=147840 [2021-08-29 10:59:25,512 INFO L87 Difference]: Start difference. First operand 677 states and 773 transitions. Second operand has 193 states, 193 states have (on average 2.0259067357512954) internal successors, (391), 193 states have internal predecessors, (391), 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 10:59:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:59:29,824 INFO L93 Difference]: Finished difference Result 27957 states and 28143 transitions. [2021-08-29 10:59:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-08-29 10:59:29,825 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.0259067357512954) internal successors, (391), 193 states have internal predecessors, (391), 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 391 [2021-08-29 10:59:29,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:59:29,829 INFO L225 Difference]: With dead ends: 27957 [2021-08-29 10:59:29,829 INFO L226 Difference]: Without dead ends: 1200 [2021-08-29 10:59:29,845 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36480 ImplicationChecksByTransitivity, 25309.31ms TimeCoverageRelationStatistics Valid=37057, Invalid=110783, Unknown=0, NotChecked=0, Total=147840 [2021-08-29 10:59:29,846 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 656 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 453.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.61ms SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 567.04ms IncrementalHoareTripleChecker+Time [2021-08-29 10:59:29,846 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 0 Invalid, 2562 Unknown, 0 Unchecked, 4.61ms Time], IncrementalHoareTripleChecker [91 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 567.04ms Time] [2021-08-29 10:59:29,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-08-29 10:59:29,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1184. [2021-08-29 10:59:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 1.007607776838546) internal successors, (1192), 1183 states have internal predecessors, (1192), 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 10:59:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1192 transitions. [2021-08-29 10:59:29,860 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1192 transitions. Word has length 391 [2021-08-29 10:59:29,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:59:29,860 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 1192 transitions. [2021-08-29 10:59:29,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.0259067357512954) internal successors, (391), 193 states have internal predecessors, (391), 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 10:59:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1192 transitions. [2021-08-29 10:59:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2021-08-29 10:59:29,865 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:59:29,865 INFO L513 BasicCegarLoop]: trace histogram [100, 99, 92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:59:29,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-29 10:59:30,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:59:30,081 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:59:30,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:59:30,082 INFO L82 PathProgramCache]: Analyzing trace with hash -548522195, now seen corresponding path program 1 times [2021-08-29 10:59:30,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:59:30,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139285061] [2021-08-29 10:59:30,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:59:30,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:59:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:59:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:59:39,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:59:39,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139285061] [2021-08-29 10:59:39,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139285061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:59:39,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717351475] [2021-08-29 10:59:39,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:59:39,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:59:39,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:59:39,957 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 10:59:39,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-29 10:59:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:59:40,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1383 conjuncts, 194 conjunts are in the unsatisfiable core [2021-08-29 10:59:40,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:59:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:59:40,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:59:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:59:42,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717351475] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:59:42,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:59:42,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194, 194] total 205 [2021-08-29 10:59:42,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760866009] [2021-08-29 10:59:42,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 205 states [2021-08-29 10:59:42,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:59:42,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2021-08-29 10:59:42,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20508, Invalid=21312, Unknown=0, NotChecked=0, Total=41820 [2021-08-29 10:59:42,753 INFO L87 Difference]: Start difference. First operand 1184 states and 1192 transitions. Second operand has 205 states, 205 states have (on average 2.131707317073171) internal successors, (437), 205 states have internal predecessors, (437), 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 10:59:54,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:59:54,038 INFO L93 Difference]: Finished difference Result 2335 states and 2470 transitions. [2021-08-29 10:59:54,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2021-08-29 10:59:54,038 INFO L78 Accepts]: Start accepts. Automaton has has 205 states, 205 states have (on average 2.131707317073171) internal successors, (437), 205 states have internal predecessors, (437), 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 391 [2021-08-29 10:59:54,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:59:54,039 INFO L225 Difference]: With dead ends: 2335 [2021-08-29 10:59:54,039 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 10:59:54,041 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 769 SyntacticMatches, 2 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 11236.85ms TimeCoverageRelationStatistics Valid=20634, Invalid=24948, Unknown=0, NotChecked=0, Total=45582 [2021-08-29 10:59:54,042 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 2175 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 2043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 752.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2175 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.00ms SdHoareTripleChecker+Time, 2043 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 953.11ms IncrementalHoareTripleChecker+Time [2021-08-29 10:59:54,042 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [2175 Valid, 0 Invalid, 2853 Unknown, 0 Unchecked, 7.00ms Time], IncrementalHoareTripleChecker [2043 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 953.11ms Time] [2021-08-29 10:59:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 10:59:54,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 10:59:54,042 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 10:59:54,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 10:59:54,042 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 391 [2021-08-29 10:59:54,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:59:54,042 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 10:59:54,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 205 states, 205 states have (on average 2.131707317073171) internal successors, (437), 205 states have internal predecessors, (437), 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 10:59:54,043 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 10:59:54,043 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 10:59:54,045 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 10:59:54,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-29 10:59:54,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-29 10:59:54,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 10:59:54,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:59:54,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:59:54,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 10:59:54,274 INFO L858 garLoopResultBuilder]: For program point L35-2(lines 34 38) no Hoare annotation was computed. [2021-08-29 10:59:54,274 INFO L858 garLoopResultBuilder]: For program point L35-3(lines 24 42) no Hoare annotation was computed. [2021-08-29 10:59:54,274 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-08-29 10:59:54,274 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 10:59:54,274 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 10:59:54,274 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 10:59:54,274 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-08-29 10:59:54,275 INFO L861 garLoopResultBuilder]: At program point L41(lines 24 42) the Hoare annotation is: true [2021-08-29 10:59:54,275 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 10:59:54,275 INFO L858 garLoopResultBuilder]: For program point L29(lines 29 31) no Hoare annotation was computed. [2021-08-29 10:59:54,275 INFO L858 garLoopResultBuilder]: For program point L29-2(lines 28 31) no Hoare annotation was computed. [2021-08-29 10:59:54,275 INFO L858 garLoopResultBuilder]: For program point L29-3(lines 24 42) no Hoare annotation was computed. [2021-08-29 10:59:54,275 INFO L858 garLoopResultBuilder]: For program point L26(lines 26 27) no Hoare annotation was computed. [2021-08-29 10:59:54,275 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-08-29 10:59:54,275 INFO L861 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-08-29 10:59:54,275 INFO L861 garLoopResultBuilder]: At program point L39(lines 24 42) the Hoare annotation is: true [2021-08-29 10:59:54,275 INFO L858 garLoopResultBuilder]: For program point L35(lines 35 38) no Hoare annotation was computed. [2021-08-29 10:59:54,280 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 10:59:54,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 10:59:54 BoogieIcfgContainer [2021-08-29 10:59:54,290 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 10:59:54,290 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 10:59:54,290 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 10:59:54,290 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 10:59:54,291 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:58:10" (3/4) ... [2021-08-29 10:59:54,296 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 10:59:54,303 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-29 10:59:54,303 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 10:59:54,303 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 10:59:54,304 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 10:59:54,360 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 10:59:54,360 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 10:59:54,361 INFO L158 Benchmark]: Toolchain (without parser) took 104114.56ms. Allocated memory was 48.2MB in the beginning and 1.6GB in the end (delta: 1.6GB). Free memory was 26.0MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 347.8MB. Max. memory is 16.1GB. [2021-08-29 10:59:54,362 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 48.2MB. Free memory is still 30.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:59:54,363 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.86ms. Allocated memory was 48.2MB in the beginning and 62.9MB in the end (delta: 14.7MB). Free memory was 25.7MB in the beginning and 47.6MB in the end (delta: -21.9MB). Peak memory consumption was 7.4MB. Max. memory is 16.1GB. [2021-08-29 10:59:54,363 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.56ms. Allocated memory is still 62.9MB. Free memory was 47.4MB in the beginning and 46.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:59:54,363 INFO L158 Benchmark]: Boogie Preprocessor took 30.14ms. Allocated memory is still 62.9MB. Free memory was 46.2MB in the beginning and 45.1MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 10:59:54,364 INFO L158 Benchmark]: RCFGBuilder took 236.90ms. Allocated memory is still 62.9MB. Free memory was 44.9MB in the beginning and 36.6MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 10:59:54,364 INFO L158 Benchmark]: TraceAbstraction took 103570.37ms. Allocated memory was 62.9MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 36.2MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 340.4MB. Max. memory is 16.1GB. [2021-08-29 10:59:54,364 INFO L158 Benchmark]: Witness Printer took 70.35ms. Allocated memory is still 1.6GB. Free memory was 1.2GB in the beginning and 1.2GB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 10:59:54,366 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 48.2MB. Free memory is still 30.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 168.86ms. Allocated memory was 48.2MB in the beginning and 62.9MB in the end (delta: 14.7MB). Free memory was 25.7MB in the beginning and 47.6MB in the end (delta: -21.9MB). Peak memory consumption was 7.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.56ms. Allocated memory is still 62.9MB. Free memory was 47.4MB in the beginning and 46.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 30.14ms. Allocated memory is still 62.9MB. Free memory was 46.2MB in the beginning and 45.1MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 236.90ms. Allocated memory is still 62.9MB. Free memory was 44.9MB in the beginning and 36.6MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 103570.37ms. Allocated memory was 62.9MB in the beginning and 1.6GB in the end (delta: 1.5GB). Free memory was 36.2MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 340.4MB. Max. memory is 16.1GB. * Witness Printer took 70.35ms. Allocated memory is still 1.6GB. Free memory was 1.2GB in the beginning and 1.2GB in the end (delta: 2.1MB). 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, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 103514.57ms, OverallIterations: 10, TraceHistogramMax: 191, EmptinessCheckTime: 37.08ms, AutomataDifference: 46289.64ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 12.71ms, InitialAbstractionConstructionTime: 7.32ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8520 SdHoareTripleChecker+Valid, 4332.88ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8520 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 3290.03ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2294 mSDsCounter, 4881 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6078 IncrementalHoareTripleChecker+Invalid, 10959 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4881 mSolverCounterUnsat, 1 mSDtfsCounter, 6078 mSolverCounterSat, 62.51ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2792 GetRequests, 1613 SyntacticMatches, 8 SemanticMatches, 1171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50906 ImplicationChecksByTransitivity, 55152.90ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1184occurred in iteration=9, InterpolantAutomatonStates: 977, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 124.24ms AutomataMinimizationTime, 10 MinimizatonAttempts, 6524 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 6 NumberOfFragments, 3 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 7.16ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 1.02ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 196.40ms SsaConstructionTime, 1055.27ms SatisfiabilityAnalysisTime, 53676.65ms InterpolantComputationTime, 2424 NumberOfCodeBlocks, 2424 NumberOfCodeBlocksAsserted, 170 NumberOfCheckSat, 3210 ConstructedInterpolants, 0 QuantifiedInterpolants, 9471 SizeOfPredicates, 14 NumberOfNonLiveVariables, 4634 ConjunctsInSsa, 587 ConjunctsInUnsatCore, 25 InterpolantComputations, 3 PerfectInterpolantSequences, 36290/162586 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: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-29 10:59:54,429 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...