./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/nested_4.c --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-simple/nested_4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1f0612232c1c27f632e5ebc1ac9944571433fe3b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 11:46:37,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 11:46:37,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 11:46:37,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 11:46:37,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 11:46:37,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 11:46:37,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 11:46:37,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 11:46:37,449 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 11:46:37,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 11:46:37,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 11:46:37,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 11:46:37,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 11:46:37,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 11:46:37,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 11:46:37,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 11:46:37,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 11:46:37,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 11:46:37,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 11:46:37,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 11:46:37,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 11:46:37,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 11:46:37,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 11:46:37,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 11:46:37,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 11:46:37,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 11:46:37,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 11:46:37,485 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 11:46:37,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 11:46:37,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 11:46:37,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 11:46:37,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 11:46:37,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 11:46:37,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 11:46:37,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 11:46:37,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 11:46:37,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 11:46:37,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 11:46:37,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 11:46:37,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 11:46:37,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 11:46:37,493 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 11:46:37,513 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 11:46:37,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 11:46:37,513 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 11:46:37,513 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 11:46:37,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 11:46:37,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 11:46:37,514 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 11:46:37,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 11:46:37,514 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 11:46:37,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 11:46:37,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 11:46:37,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 11:46:37,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 11:46:37,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 11:46:37,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 11:46:37,515 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 11:46:37,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 11:46:37,515 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 11:46:37,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 11:46:37,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 11:46:37,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 11:46:37,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 11:46:37,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 11:46:37,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 11:46:37,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 11:46:37,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 11:46:37,523 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 11:46:37,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 11:46:37,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 11:46:37,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 11:46:37,523 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f0612232c1c27f632e5ebc1ac9944571433fe3b [2021-08-29 11:46:37,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 11:46:37,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 11:46:37,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 11:46:37,801 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 11:46:37,802 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 11:46:37,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/nested_4.c [2021-08-29 11:46:37,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f11fbe423/179007aadc3f4d0aa2b761e0d2e2893b/FLAGa1d1ad968 [2021-08-29 11:46:38,257 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 11:46:38,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_4.c [2021-08-29 11:46:38,261 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f11fbe423/179007aadc3f4d0aa2b761e0d2e2893b/FLAGa1d1ad968 [2021-08-29 11:46:38,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f11fbe423/179007aadc3f4d0aa2b761e0d2e2893b [2021-08-29 11:46:38,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 11:46:38,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 11:46:38,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 11:46:38,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 11:46:38,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 11:46:38,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:46:38" (1/1) ... [2021-08-29 11:46:38,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39802a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:38, skipping insertion in model container [2021-08-29 11:46:38,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:46:38" (1/1) ... [2021-08-29 11:46:38,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 11:46:38,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 11:46:38,484 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-simple/nested_4.c[841,854] [2021-08-29 11:46:38,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 11:46:38,492 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 11:46:38,504 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-simple/nested_4.c[841,854] [2021-08-29 11:46:38,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 11:46:38,514 INFO L208 MainTranslator]: Completed translation [2021-08-29 11:46:38,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:38 WrapperNode [2021-08-29 11:46:38,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 11:46:38,517 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 11:46:38,517 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 11:46:38,517 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 11:46:38,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:38" (1/1) ... [2021-08-29 11:46:38,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:38" (1/1) ... [2021-08-29 11:46:38,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 11:46:38,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 11:46:38,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 11:46:38,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 11:46:38,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:38" (1/1) ... [2021-08-29 11:46:38,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:38" (1/1) ... [2021-08-29 11:46:38,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:38" (1/1) ... [2021-08-29 11:46:38,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:38" (1/1) ... [2021-08-29 11:46:38,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:38" (1/1) ... [2021-08-29 11:46:38,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:38" (1/1) ... [2021-08-29 11:46:38,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:38" (1/1) ... [2021-08-29 11:46:38,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 11:46:38,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 11:46:38,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 11:46:38,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 11:46:38,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:38" (1/1) ... [2021-08-29 11:46:38,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 11:46:38,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:46:38,625 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 11:46:38,638 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 11:46:38,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 11:46:38,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 11:46:38,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 11:46:38,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 11:46:38,795 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 11:46:38,796 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-29 11:46:38,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:46:38 BoogieIcfgContainer [2021-08-29 11:46:38,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 11:46:38,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 11:46:38,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 11:46:38,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 11:46:38,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:46:38" (1/3) ... [2021-08-29 11:46:38,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a25694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:46:38, skipping insertion in model container [2021-08-29 11:46:38,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:46:38" (2/3) ... [2021-08-29 11:46:38,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a25694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:46:38, skipping insertion in model container [2021-08-29 11:46:38,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:46:38" (3/3) ... [2021-08-29 11:46:38,806 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_4.c [2021-08-29 11:46:38,811 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 11:46:38,811 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 11:46:38,845 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 11:46:38,853 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 11:46:38,853 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 11:46:38,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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 11:46:38,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-29 11:46:38,868 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:46:38,868 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-29 11:46:38,869 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:46:38,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:46:38,873 INFO L82 PathProgramCache]: Analyzing trace with hash 28738512, now seen corresponding path program 1 times [2021-08-29 11:46:38,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:46:38,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053772410] [2021-08-29 11:46:38,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:46:38,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:46:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:46:39,010 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 11:46:39,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:46:39,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053772410] [2021-08-29 11:46:39,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053772410] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:46:39,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:46:39,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 11:46:39,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970295175] [2021-08-29 11:46:39,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 11:46:39,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:46:39,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 11:46:39,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 11:46:39,037 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 11:46:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:46:39,091 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2021-08-29 11:46:39,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 11:46:39,094 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-08-29 11:46:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:46:39,098 INFO L225 Difference]: With dead ends: 32 [2021-08-29 11:46:39,099 INFO L226 Difference]: Without dead ends: 13 [2021-08-29 11:46:39,100 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 11:46:39,103 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.19ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.25ms IncrementalHoareTripleChecker+Time [2021-08-29 11:46:39,104 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 20 Unknown, 0 Unchecked, 0.19ms Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 44.25ms Time] [2021-08-29 11:46:39,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-08-29 11:46:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-08-29 11:46:39,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 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 11:46:39,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-08-29 11:46:39,122 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 5 [2021-08-29 11:46:39,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:46:39,123 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-08-29 11:46:39,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 11:46:39,123 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-08-29 11:46:39,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-29 11:46:39,124 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:46:39,124 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-29 11:46:39,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 11:46:39,124 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:46:39,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:46:39,125 INFO L82 PathProgramCache]: Analyzing trace with hash 28698150, now seen corresponding path program 1 times [2021-08-29 11:46:39,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:46:39,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476507651] [2021-08-29 11:46:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:46:39,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:46:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:46:39,176 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 11:46:39,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:46:39,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476507651] [2021-08-29 11:46:39,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476507651] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:46:39,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:46:39,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 11:46:39,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796579303] [2021-08-29 11:46:39,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 11:46:39,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:46:39,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 11:46:39,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 11:46:39,181 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 11:46:39,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:46:39,234 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-08-29 11:46:39,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 11:46:39,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-08-29 11:46:39,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:46:39,235 INFO L225 Difference]: With dead ends: 24 [2021-08-29 11:46:39,235 INFO L226 Difference]: Without dead ends: 21 [2021-08-29 11:46:39,236 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.05ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 11:46:39,237 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 10 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.65ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.18ms IncrementalHoareTripleChecker+Time [2021-08-29 11:46:39,237 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 0 Invalid, 31 Unknown, 0 Unchecked, 2.65ms Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 46.18ms Time] [2021-08-29 11:46:39,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-29 11:46:39,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2021-08-29 11:46:39,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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 11:46:39,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-08-29 11:46:39,240 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 5 [2021-08-29 11:46:39,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:46:39,241 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-08-29 11:46:39,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 11:46:39,241 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-08-29 11:46:39,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-29 11:46:39,241 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:46:39,242 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:46:39,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 11:46:39,242 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:46:39,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:46:39,243 INFO L82 PathProgramCache]: Analyzing trace with hash 270060130, now seen corresponding path program 1 times [2021-08-29 11:46:39,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:46:39,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771944152] [2021-08-29 11:46:39,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:46:39,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:46:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:46:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:46:39,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:46:39,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771944152] [2021-08-29 11:46:39,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771944152] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:46:39,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:46:39,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 11:46:39,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998467411] [2021-08-29 11:46:39,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 11:46:39,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:46:39,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 11:46:39,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 11:46:39,276 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 11:46:39,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:46:39,309 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2021-08-29 11:46:39,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 11:46:39,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2021-08-29 11:46:39,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:46:39,310 INFO L225 Difference]: With dead ends: 31 [2021-08-29 11:46:39,310 INFO L226 Difference]: Without dead ends: 20 [2021-08-29 11:46:39,311 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.80ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 11:46:39,312 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.26ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.63ms IncrementalHoareTripleChecker+Time [2021-08-29 11:46:39,312 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 31 Unknown, 0 Unchecked, 0.26ms Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 29.63ms Time] [2021-08-29 11:46:39,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-29 11:46:39,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2021-08-29 11:46:39,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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 11:46:39,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-08-29 11:46:39,315 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2021-08-29 11:46:39,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:46:39,315 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-08-29 11:46:39,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 11:46:39,316 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-08-29 11:46:39,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 11:46:39,316 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:46:39,316 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:46:39,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-29 11:46:39,317 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:46:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:46:39,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1248345450, now seen corresponding path program 1 times [2021-08-29 11:46:39,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:46:39,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764197262] [2021-08-29 11:46:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:46:39,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:46:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:46:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:46:39,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:46:39,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764197262] [2021-08-29 11:46:39,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764197262] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:46:39,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:46:39,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 11:46:39,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143815427] [2021-08-29 11:46:39,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 11:46:39,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:46:39,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 11:46:39,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 11:46:39,342 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 11:46:39,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:46:39,382 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2021-08-29 11:46:39,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 11:46:39,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 11:46:39,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:46:39,383 INFO L225 Difference]: With dead ends: 31 [2021-08-29 11:46:39,383 INFO L226 Difference]: Without dead ends: 19 [2021-08-29 11:46:39,383 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.64ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 11:46:39,384 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.23ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.17ms IncrementalHoareTripleChecker+Time [2021-08-29 11:46:39,384 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 31 Unknown, 0 Unchecked, 0.23ms Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 36.17ms Time] [2021-08-29 11:46:39,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-29 11:46:39,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2021-08-29 11:46:39,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 11:46:39,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-08-29 11:46:39,393 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2021-08-29 11:46:39,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:46:39,393 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-08-29 11:46:39,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 11:46:39,393 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-08-29 11:46:39,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 11:46:39,394 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:46:39,394 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:46:39,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-29 11:46:39,395 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:46:39,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:46:39,395 INFO L82 PathProgramCache]: Analyzing trace with hash -793045314, now seen corresponding path program 1 times [2021-08-29 11:46:39,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:46:39,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119361713] [2021-08-29 11:46:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:46:39,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:46:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:46:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:46:39,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:46:39,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119361713] [2021-08-29 11:46:39,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119361713] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:46:39,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:46:39,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 11:46:39,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325178875] [2021-08-29 11:46:39,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 11:46:39,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:46:39,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 11:46:39,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 11:46:39,435 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:46:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:46:39,470 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-08-29 11:46:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 11:46:39,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-29 11:46:39,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:46:39,472 INFO L225 Difference]: With dead ends: 31 [2021-08-29 11:46:39,473 INFO L226 Difference]: Without dead ends: 18 [2021-08-29 11:46:39,473 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.81ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 11:46:39,481 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.76ms IncrementalHoareTripleChecker+Time [2021-08-29 11:46:39,484 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 31 Unknown, 0 Unchecked, 0.32ms Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 25.76ms Time] [2021-08-29 11:46:39,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-29 11:46:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-08-29 11:46:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 11:46:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-08-29 11:46:39,491 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2021-08-29 11:46:39,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:46:39,492 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-08-29 11:46:39,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:46:39,492 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-08-29 11:46:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 11:46:39,493 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:46:39,493 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:46:39,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-29 11:46:39,493 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:46:39,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:46:39,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1973513092, now seen corresponding path program 1 times [2021-08-29 11:46:39,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:46:39,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108504211] [2021-08-29 11:46:39,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:46:39,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:46:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:46:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:46:39,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:46:39,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108504211] [2021-08-29 11:46:39,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108504211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:46:39,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994733767] [2021-08-29 11:46:39,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:46:39,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:46:39,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:46:39,542 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 11:46:39,548 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 11:46:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:46:39,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-29 11:46:39,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:46:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:46:39,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:46:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:46:39,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994733767] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:46:39,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:46:39,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-08-29 11:46:39,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056814133] [2021-08-29 11:46:39,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 11:46:39,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:46:39,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 11:46:39,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-29 11:46:39,711 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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 11:46:39,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:46:39,747 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-08-29 11:46:39,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 11:46:39,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-29 11:46:39,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:46:39,748 INFO L225 Difference]: With dead ends: 37 [2021-08-29 11:46:39,748 INFO L226 Difference]: Without dead ends: 23 [2021-08-29 11:46:39,748 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.90ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-29 11:46:39,749 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.52ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.01ms IncrementalHoareTripleChecker+Time [2021-08-29 11:46:39,749 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.52ms Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 29.01ms Time] [2021-08-29 11:46:39,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-29 11:46:39,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-08-29 11:46:39,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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 11:46:39,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-08-29 11:46:39,752 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2021-08-29 11:46:39,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:46:39,753 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-08-29 11:46:39,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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 11:46:39,753 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-08-29 11:46:39,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 11:46:39,753 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:46:39,753 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:46:39,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-29 11:46:39,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-29 11:46:39,969 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:46:39,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:46:39,970 INFO L82 PathProgramCache]: Analyzing trace with hash -430063434, now seen corresponding path program 2 times [2021-08-29 11:46:39,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:46:39,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546497547] [2021-08-29 11:46:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:46:39,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:46:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:46:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-29 11:46:40,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:46:40,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546497547] [2021-08-29 11:46:40,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546497547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:46:40,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167906004] [2021-08-29 11:46:40,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 11:46:40,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:46:40,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:46:40,012 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 11:46:40,015 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 11:46:40,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 11:46:40,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 11:46:40,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 11:46:40,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:46:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:46:40,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:46:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:46:40,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167906004] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:46:40,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:46:40,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2021-08-29 11:46:40,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928073565] [2021-08-29 11:46:40,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 11:46:40,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:46:40,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 11:46:40,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-29 11:46:40,206 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:46:40,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:46:40,335 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2021-08-29 11:46:40,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-29 11:46:40,335 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-29 11:46:40,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:46:40,336 INFO L225 Difference]: With dead ends: 76 [2021-08-29 11:46:40,336 INFO L226 Difference]: Without dead ends: 56 [2021-08-29 11:46:40,336 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 96.79ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-08-29 11:46:40,337 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.73ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.55ms IncrementalHoareTripleChecker+Time [2021-08-29 11:46:40,337 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 85 Unknown, 0 Unchecked, 1.73ms Time], IncrementalHoareTripleChecker [25 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 44.55ms Time] [2021-08-29 11:46:40,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-29 11:46:40,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2021-08-29 11:46:40,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 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 11:46:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-08-29 11:46:40,342 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 22 [2021-08-29 11:46:40,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:46:40,342 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-08-29 11:46:40,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:46:40,342 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-08-29 11:46:40,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-29 11:46:40,343 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:46:40,343 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:46:40,362 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 11:46:40,558 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,SelfDestructingSolverStorable6 [2021-08-29 11:46:40,558 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:46:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:46:40,559 INFO L82 PathProgramCache]: Analyzing trace with hash -340835222, now seen corresponding path program 3 times [2021-08-29 11:46:40,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:46:40,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182541697] [2021-08-29 11:46:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:46:40,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:46:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:46:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-08-29 11:46:40,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:46:40,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182541697] [2021-08-29 11:46:40,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182541697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:46:40,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304814186] [2021-08-29 11:46:40,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 11:46:40,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:46:40,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:46:40,618 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 11:46:40,619 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 11:46:40,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-29 11:46:40,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 11:46:40,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-29 11:46:40,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:46:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-08-29 11:46:40,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:46:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-08-29 11:46:40,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304814186] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:46:40,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:46:40,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-08-29 11:46:40,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805446983] [2021-08-29 11:46:40,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 11:46:40,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:46:40,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 11:46:40,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-29 11:46:40,822 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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 11:46:40,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:46:40,955 INFO L93 Difference]: Finished difference Result 449 states and 500 transitions. [2021-08-29 11:46:40,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-29 11:46:40,958 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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 41 [2021-08-29 11:46:40,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:46:40,960 INFO L225 Difference]: With dead ends: 449 [2021-08-29 11:46:40,960 INFO L226 Difference]: Without dead ends: 410 [2021-08-29 11:46:40,961 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 49.65ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-29 11:46:40,961 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 200 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.10ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.29ms IncrementalHoareTripleChecker+Time [2021-08-29 11:46:40,961 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 0 Invalid, 106 Unknown, 0 Unchecked, 5.10ms Time], IncrementalHoareTripleChecker [22 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 61.29ms Time] [2021-08-29 11:46:40,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-29 11:46:40,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 282. [2021-08-29 11:46:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.103202846975089) internal successors, (310), 281 states have internal predecessors, (310), 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 11:46:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 310 transitions. [2021-08-29 11:46:40,984 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 310 transitions. Word has length 41 [2021-08-29 11:46:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:46:40,984 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 310 transitions. [2021-08-29 11:46:40,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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 11:46:40,985 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 310 transitions. [2021-08-29 11:46:40,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-08-29 11:46:40,991 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:46:40,991 INFO L513 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2021-08-29 11:46:41,007 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 11:46:41,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:46:41,197 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:46:41,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:46:41,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1674088742, now seen corresponding path program 4 times [2021-08-29 11:46:41,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:46:41,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353637651] [2021-08-29 11:46:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:46:41,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:46:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:46:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11282 backedges. 2486 proven. 89 refuted. 0 times theorem prover too weak. 8707 trivial. 0 not checked. [2021-08-29 11:46:41,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:46:41,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353637651] [2021-08-29 11:46:41,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353637651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:46:41,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012757761] [2021-08-29 11:46:41,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 11:46:41,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:46:41,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:46:41,363 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 11:46:41,364 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 11:46:41,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 11:46:41,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 11:46:41,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-29 11:46:41,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:46:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11282 backedges. 2486 proven. 89 refuted. 0 times theorem prover too weak. 8707 trivial. 0 not checked. [2021-08-29 11:46:41,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:46:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11282 backedges. 2486 proven. 89 refuted. 0 times theorem prover too weak. 8707 trivial. 0 not checked. [2021-08-29 11:46:42,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012757761] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:46:42,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:46:42,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-08-29 11:46:42,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517128668] [2021-08-29 11:46:42,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 11:46:42,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:46:42,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 11:46:42,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-29 11:46:42,340 INFO L87 Difference]: Start difference. First operand 282 states and 310 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 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 11:46:42,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:46:42,414 INFO L93 Difference]: Finished difference Result 1009 states and 1126 transitions. [2021-08-29 11:46:42,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 11:46:42,415 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 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 281 [2021-08-29 11:46:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:46:42,417 INFO L225 Difference]: With dead ends: 1009 [2021-08-29 11:46:42,418 INFO L226 Difference]: Without dead ends: 762 [2021-08-29 11:46:42,419 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 18.51ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-29 11:46:42,420 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.50ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.46ms IncrementalHoareTripleChecker+Time [2021-08-29 11:46:42,420 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 67 Unknown, 0 Unchecked, 0.50ms Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 45.46ms Time] [2021-08-29 11:46:42,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-08-29 11:46:42,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 762. [2021-08-29 11:46:42,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 1.0801576872536136) internal successors, (822), 761 states have internal predecessors, (822), 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 11:46:42,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 822 transitions. [2021-08-29 11:46:42,471 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 822 transitions. Word has length 281 [2021-08-29 11:46:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:46:42,471 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 822 transitions. [2021-08-29 11:46:42,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 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 11:46:42,471 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 822 transitions. [2021-08-29 11:46:42,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2021-08-29 11:46:42,484 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:46:42,485 INFO L513 BasicCegarLoop]: trace histogram [288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2021-08-29 11:46:42,506 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 11:46:42,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:46:42,701 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:46:42,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:46:42,701 INFO L82 PathProgramCache]: Analyzing trace with hash 388372774, now seen corresponding path program 5 times [2021-08-29 11:46:42,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:46:42,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449920723] [2021-08-29 11:46:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:46:42,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:46:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:46:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 100386 backedges. 37783 proven. 3149 refuted. 0 times theorem prover too weak. 59454 trivial. 0 not checked. [2021-08-29 11:46:43,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:46:43,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449920723] [2021-08-29 11:46:43,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449920723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:46:43,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425722541] [2021-08-29 11:46:43,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-29 11:46:43,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:46:43,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:46:43,017 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 11:46:43,018 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 11:46:43,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 83 check-sat command(s) [2021-08-29 11:46:43,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 11:46:43,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-29 11:46:43,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:46:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 100386 backedges. 62974 proven. 3149 refuted. 0 times theorem prover too weak. 34263 trivial. 0 not checked. [2021-08-29 11:46:44,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:46:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 100386 backedges. 62974 proven. 3149 refuted. 0 times theorem prover too weak. 34263 trivial. 0 not checked. [2021-08-29 11:46:45,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425722541] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:46:45,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:46:45,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-08-29 11:46:45,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400051734] [2021-08-29 11:46:45,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 11:46:45,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:46:45,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 11:46:45,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-29 11:46:45,300 INFO L87 Difference]: Start difference. First operand 762 states and 822 transitions. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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 11:46:45,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:46:45,399 INFO L93 Difference]: Finished difference Result 2822 states and 3055 transitions. [2021-08-29 11:46:45,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 11:46:45,400 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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 761 [2021-08-29 11:46:45,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:46:45,406 INFO L225 Difference]: With dead ends: 2822 [2021-08-29 11:46:45,406 INFO L226 Difference]: Without dead ends: 2250 [2021-08-29 11:46:45,408 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 1525 GetRequests, 1518 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 18.48ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-29 11:46:45,408 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.56ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.57ms IncrementalHoareTripleChecker+Time [2021-08-29 11:46:45,409 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 0 Invalid, 91 Unknown, 0 Unchecked, 0.56ms Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 45.57ms Time] [2021-08-29 11:46:45,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2021-08-29 11:46:45,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2250. [2021-08-29 11:46:45,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 2249 states have (on average 1.0769230769230769) internal successors, (2422), 2249 states have internal predecessors, (2422), 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 11:46:45,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 2422 transitions. [2021-08-29 11:46:45,480 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 2422 transitions. Word has length 761 [2021-08-29 11:46:45,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:46:45,481 INFO L470 AbstractCegarLoop]: Abstraction has 2250 states and 2422 transitions. [2021-08-29 11:46:45,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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 11:46:45,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 2422 transitions. [2021-08-29 11:46:45,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2250 [2021-08-29 11:46:45,565 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:46:45,566 INFO L513 BasicCegarLoop]: trace histogram [864, 864, 144, 144, 144, 24, 24, 24, 4, 4, 4, 1, 1, 1, 1, 1] [2021-08-29 11:46:45,584 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 11:46:45,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-29 11:46:45,769 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:46:45,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:46:45,770 INFO L82 PathProgramCache]: Analyzing trace with hash 994878758, now seen corresponding path program 6 times [2021-08-29 11:46:45,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:46:45,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069607388] [2021-08-29 11:46:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:46:45,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:46:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:46:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 905338 backedges. 0 proven. 679846 refuted. 0 times theorem prover too weak. 225492 trivial. 0 not checked. [2021-08-29 11:46:47,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:46:47,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069607388] [2021-08-29 11:46:47,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069607388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:46:47,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204987661] [2021-08-29 11:46:47,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-29 11:46:47,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:46:47,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:46:47,805 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 11:46:47,806 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 11:46:49,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 377 check-sat command(s) [2021-08-29 11:46:49,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 11:46:49,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 2172 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-29 11:46:49,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:46:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 905338 backedges. 356105 proven. 0 refuted. 0 times theorem prover too weak. 549233 trivial. 0 not checked. [2021-08-29 11:46:52,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 11:46:52,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204987661] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:46:52,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-29 11:46:52,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7] total 19 [2021-08-29 11:46:52,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973294154] [2021-08-29 11:46:52,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-29 11:46:52,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:46:52,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-29 11:46:52,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-29 11:46:52,713 INFO L87 Difference]: Start difference. First operand 2250 states and 2422 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 11:46:52,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:46:52,821 INFO L93 Difference]: Finished difference Result 2250 states and 2422 transitions. [2021-08-29 11:46:52,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-29 11:46:52,821 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 2249 [2021-08-29 11:46:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:46:52,824 INFO L225 Difference]: With dead ends: 2250 [2021-08-29 11:46:52,824 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 11:46:52,826 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2255 GetRequests, 2238 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 131.01ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-29 11:46:52,827 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.42ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.72ms IncrementalHoareTripleChecker+Time [2021-08-29 11:46:52,827 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 104 Unknown, 0 Unchecked, 0.42ms Time], IncrementalHoareTripleChecker [17 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 36.72ms Time] [2021-08-29 11:46:52,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 11:46:52,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 11:46:52,828 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 11:46:52,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 11:46:52,828 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 2249 [2021-08-29 11:46:52,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:46:52,829 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 11:46:52,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 11:46:52,829 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 11:46:52,829 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 11:46:52,831 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 11:46:52,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-29 11:46:53,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:46:53,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 11:46:53,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:46:53,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:46:54,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:46:54,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:46:54,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:46:54,857 INFO L858 garLoopResultBuilder]: For program point L31-1(lines 31 33) no Hoare annotation was computed. [2021-08-29 11:46:54,857 INFO L858 garLoopResultBuilder]: For program point L23-2(lines 23 29) no Hoare annotation was computed. [2021-08-29 11:46:54,857 INFO L854 garLoopResultBuilder]: At program point L23-3(lines 23 29) the Hoare annotation is: (and (< ULTIMATE.start_main_~a~0 6) (<= 6 ULTIMATE.start_main_~d~0) (< ULTIMATE.start_main_~b~0 7) (< ULTIMATE.start_main_~d~0 7) (<= 6 ULTIMATE.start_main_~c~0) (< ULTIMATE.start_main_~c~0 7)) [2021-08-29 11:46:54,857 INFO L858 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2021-08-29 11:46:54,857 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 11:46:54,857 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 11:46:54,857 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 11:46:54,857 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 32) no Hoare annotation was computed. [2021-08-29 11:46:54,857 INFO L858 garLoopResultBuilder]: For program point L24-2(lines 24 28) no Hoare annotation was computed. [2021-08-29 11:46:54,858 INFO L854 garLoopResultBuilder]: At program point L24-3(lines 24 28) the Hoare annotation is: (and (< ULTIMATE.start_main_~a~0 6) (< ULTIMATE.start_main_~b~0 6) (<= 6 ULTIMATE.start_main_~d~0) (< ULTIMATE.start_main_~d~0 7) (< ULTIMATE.start_main_~c~0 7)) [2021-08-29 11:46:54,858 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 11:46:54,858 INFO L858 garLoopResultBuilder]: For program point L25-2(lines 25 27) no Hoare annotation was computed. [2021-08-29 11:46:54,858 INFO L854 garLoopResultBuilder]: At program point L25-3(lines 25 27) the Hoare annotation is: (and (< ULTIMATE.start_main_~a~0 6) (< ULTIMATE.start_main_~b~0 6) (< ULTIMATE.start_main_~d~0 7) (< ULTIMATE.start_main_~c~0 6)) [2021-08-29 11:46:54,858 INFO L861 garLoopResultBuilder]: At program point L34(lines 15 35) the Hoare annotation is: true [2021-08-29 11:46:54,858 INFO L858 garLoopResultBuilder]: For program point L22-2(lines 22 30) no Hoare annotation was computed. [2021-08-29 11:46:54,858 INFO L854 garLoopResultBuilder]: At program point L22-3(lines 22 30) the Hoare annotation is: (and (<= 6 ULTIMATE.start_main_~d~0) (<= 6 ULTIMATE.start_main_~b~0) (< ULTIMATE.start_main_~b~0 7) (< ULTIMATE.start_main_~a~0 7) (< ULTIMATE.start_main_~d~0 7) (<= 6 ULTIMATE.start_main_~c~0) (< ULTIMATE.start_main_~c~0 7)) [2021-08-29 11:46:54,858 INFO L858 garLoopResultBuilder]: For program point L22-4(lines 15 35) no Hoare annotation was computed. [2021-08-29 11:46:54,863 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 11:46:54,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 11:46:54 BoogieIcfgContainer [2021-08-29 11:46:54,873 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 11:46:54,874 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 11:46:54,874 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 11:46:54,874 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 11:46:54,874 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:46:38" (3/4) ... [2021-08-29 11:46:54,876 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 11:46:54,882 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-29 11:46:54,882 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 11:46:54,882 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 11:46:54,882 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 11:46:54,943 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 11:46:54,943 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 11:46:54,943 INFO L158 Benchmark]: Toolchain (without parser) took 16664.66ms. Allocated memory was 60.8MB in the beginning and 1.0GB in the end (delta: 975.2MB). Free memory was 41.4MB in the beginning and 465.6MB in the end (delta: -424.2MB). Peak memory consumption was 551.7MB. Max. memory is 16.1GB. [2021-08-29 11:46:54,943 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 60.8MB. Free memory was 43.1MB in the beginning and 43.0MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:46:54,944 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.51ms. Allocated memory is still 60.8MB. Free memory was 41.2MB in the beginning and 31.8MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 11:46:54,944 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.85ms. Allocated memory is still 60.8MB. Free memory was 31.8MB in the beginning and 44.3MB in the end (delta: -12.5MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2021-08-29 11:46:54,944 INFO L158 Benchmark]: Boogie Preprocessor took 29.99ms. Allocated memory is still 60.8MB. Free memory was 44.0MB in the beginning and 43.2MB in the end (delta: 823.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 11:46:54,944 INFO L158 Benchmark]: RCFGBuilder took 195.83ms. Allocated memory is still 60.8MB. Free memory was 43.0MB in the beginning and 34.8MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 11:46:54,944 INFO L158 Benchmark]: TraceAbstraction took 16073.57ms. Allocated memory was 60.8MB in the beginning and 1.0GB in the end (delta: 975.2MB). Free memory was 34.4MB in the beginning and 467.7MB in the end (delta: -433.4MB). Peak memory consumption was 618.1MB. Max. memory is 16.1GB. [2021-08-29 11:46:54,945 INFO L158 Benchmark]: Witness Printer took 69.12ms. Allocated memory is still 1.0GB. Free memory was 467.7MB in the beginning and 465.6MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 11:46:54,946 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 60.8MB. Free memory was 43.1MB in the beginning and 43.0MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 172.51ms. Allocated memory is still 60.8MB. Free memory was 41.2MB in the beginning and 31.8MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.85ms. Allocated memory is still 60.8MB. Free memory was 31.8MB in the beginning and 44.3MB in the end (delta: -12.5MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.99ms. Allocated memory is still 60.8MB. Free memory was 44.0MB in the beginning and 43.2MB in the end (delta: 823.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 195.83ms. Allocated memory is still 60.8MB. Free memory was 43.0MB in the beginning and 34.8MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 16073.57ms. Allocated memory was 60.8MB in the beginning and 1.0GB in the end (delta: 975.2MB). Free memory was 34.4MB in the beginning and 467.7MB in the end (delta: -433.4MB). Peak memory consumption was 618.1MB. Max. memory is 16.1GB. * Witness Printer took 69.12ms. Allocated memory is still 1.0GB. Free memory was 467.7MB in the beginning and 465.6MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. 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: 32]: 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: 16018.61ms, OverallIterations: 11, TraceHistogramMax: 864, EmptinessCheckTime: 112.83ms, AutomataDifference: 898.59ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 1811.43ms, InitialAbstractionConstructionTime: 8.17ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 368 SdHoareTripleChecker+Valid, 444.61ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 368 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 324.26ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 214 mSDsCounter, 78 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 587 IncrementalHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 78 mSolverCounterUnsat, 0 mSDtfsCounter, 587 mSolverCounterSat, 12.48ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4547 GetRequests, 4472 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 339.67ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2250occurred in iteration=10, InterpolantAutomatonStates: 83, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 179.69ms AutomataMinimizationTime, 11 MinimizatonAttempts, 158 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 1215 NumberOfFragments, 71 HoareAnnotationTreeSize, 5 FomulaSimplifications, 53992 FormulaSimplificationTreeSizeReduction, 1608.47ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 1827 FormulaSimplificationTreeSizeReductionInter, 193.36ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 336.34ms SsaConstructionTime, 2522.89ms SatisfiabilityAnalysisTime, 8478.38ms InterpolantComputationTime, 6783 NumberOfCodeBlocks, 5313 NumberOfCodeBlocksAsserted, 477 NumberOfCheckSat, 7882 ConstructedInterpolants, 0 QuantifiedInterpolants, 15625 SizeOfPredicates, 4 NumberOfNonLiveVariables, 3234 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 22 InterpolantComputations, 6 PerfectInterpolantSequences, 1456645/2146244 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: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((a < 6 && b < 6) && d < 7) && c < 6 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((a < 6 && 6 <= d) && b < 7) && d < 7) && 6 <= c) && c < 7 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((((6 <= d && 6 <= b) && b < 7) && a < 7) && d < 7) && 6 <= c) && c < 7 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((a < 6 && b < 6) && 6 <= d) && d < 7) && c < 7 RESULT: Ultimate proved your program to be correct! [2021-08-29 11:46:54,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...