./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/locks/test_locks_10.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/locks/test_locks_10.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 6423b7e5fbcc52c08e52aff49c79db620dd407c4 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 03:14:48,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 03:14:48,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 03:14:48,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 03:14:48,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 03:14:48,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 03:14:48,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 03:14:48,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 03:14:48,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 03:14:48,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 03:14:48,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 03:14:48,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 03:14:48,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 03:14:48,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 03:14:48,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 03:14:48,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 03:14:48,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 03:14:48,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 03:14:48,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 03:14:48,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 03:14:48,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 03:14:48,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 03:14:48,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 03:14:48,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 03:14:48,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 03:14:48,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 03:14:48,343 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 03:14:48,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 03:14:48,344 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 03:14:48,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 03:14:48,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 03:14:48,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 03:14:48,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 03:14:48,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 03:14:48,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 03:14:48,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 03:14:48,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 03:14:48,349 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 03:14:48,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 03:14:48,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 03:14:48,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 03:14:48,352 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 03:14:48,379 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 03:14:48,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 03:14:48,381 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 03:14:48,381 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 03:14:48,382 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 03:14:48,382 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 03:14:48,382 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 03:14:48,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 03:14:48,383 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 03:14:48,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 03:14:48,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 03:14:48,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 03:14:48,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 03:14:48,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 03:14:48,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 03:14:48,385 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 03:14:48,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 03:14:48,385 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 03:14:48,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 03:14:48,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 03:14:48,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 03:14:48,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 03:14:48,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 03:14:48,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 03:14:48,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 03:14:48,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 03:14:48,386 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 03:14:48,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 03:14:48,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 03:14:48,387 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 03:14:48,387 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6423b7e5fbcc52c08e52aff49c79db620dd407c4 [2021-08-29 03:14:48,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 03:14:48,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 03:14:48,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 03:14:48,653 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 03:14:48,654 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 03:14:48,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_10.c [2021-08-29 03:14:48,705 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfaf241b1/1c073b368f314aa5be8cf9148eeccbf7/FLAG7ab9c5090 [2021-08-29 03:14:49,058 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 03:14:49,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_10.c [2021-08-29 03:14:49,065 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfaf241b1/1c073b368f314aa5be8cf9148eeccbf7/FLAG7ab9c5090 [2021-08-29 03:14:49,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfaf241b1/1c073b368f314aa5be8cf9148eeccbf7 [2021-08-29 03:14:49,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 03:14:49,079 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 03:14:49,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 03:14:49,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 03:14:49,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 03:14:49,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 03:14:49" (1/1) ... [2021-08-29 03:14:49,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4809c59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:14:49, skipping insertion in model container [2021-08-29 03:14:49,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 03:14:49" (1/1) ... [2021-08-29 03:14:49,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 03:14:49,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 03:14:49,240 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/locks/test_locks_10.c[3901,3914] [2021-08-29 03:14:49,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 03:14:49,252 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 03:14:49,304 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/locks/test_locks_10.c[3901,3914] [2021-08-29 03:14:49,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 03:14:49,317 INFO L208 MainTranslator]: Completed translation [2021-08-29 03:14:49,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:14:49 WrapperNode [2021-08-29 03:14:49,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 03:14:49,320 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 03:14:49,320 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 03:14:49,320 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 03:14:49,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:14:49" (1/1) ... [2021-08-29 03:14:49,334 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:14:49" (1/1) ... [2021-08-29 03:14:49,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 03:14:49,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 03:14:49,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 03:14:49,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 03:14:49,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:14:49" (1/1) ... [2021-08-29 03:14:49,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:14:49" (1/1) ... [2021-08-29 03:14:49,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:14:49" (1/1) ... [2021-08-29 03:14:49,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:14:49" (1/1) ... [2021-08-29 03:14:49,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:14:49" (1/1) ... [2021-08-29 03:14:49,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:14:49" (1/1) ... [2021-08-29 03:14:49,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:14:49" (1/1) ... [2021-08-29 03:14:49,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 03:14:49,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 03:14:49,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 03:14:49,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 03:14:49,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:14:49" (1/1) ... [2021-08-29 03:14:49,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 03:14:49,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 03:14:49,412 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 03:14:49,430 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 03:14:49,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 03:14:49,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 03:14:49,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 03:14:49,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 03:14:49,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 03:14:49,541 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-29 03:14:49,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 03:14:49 BoogieIcfgContainer [2021-08-29 03:14:49,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 03:14:49,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 03:14:49,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 03:14:49,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 03:14:49,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 03:14:49" (1/3) ... [2021-08-29 03:14:49,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e034ce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 03:14:49, skipping insertion in model container [2021-08-29 03:14:49,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 03:14:49" (2/3) ... [2021-08-29 03:14:49,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e034ce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 03:14:49, skipping insertion in model container [2021-08-29 03:14:49,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 03:14:49" (3/3) ... [2021-08-29 03:14:49,548 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2021-08-29 03:14:49,551 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 03:14:49,551 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 03:14:49,591 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 03:14:49,595 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 03:14:49,595 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 03:14:49,603 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 38 states have (on average 1.894736842105263) internal successors, (72), 39 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 03:14:49,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-29 03:14:49,606 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:49,606 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:49,607 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:49,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:49,610 INFO L82 PathProgramCache]: Analyzing trace with hash 153349273, now seen corresponding path program 1 times [2021-08-29 03:14:49,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:49,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468566097] [2021-08-29 03:14:49,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:49,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:49,754 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 03:14:49,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:49,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468566097] [2021-08-29 03:14:49,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468566097] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:49,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:49,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:49,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218945138] [2021-08-29 03:14:49,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:49,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:49,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:49,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:49,788 INFO L87 Difference]: Start difference. First operand has 40 states, 38 states have (on average 1.894736842105263) internal successors, (72), 39 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) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 03:14:49,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:49,962 INFO L93 Difference]: Finished difference Result 83 states and 145 transitions. [2021-08-29 03:14:49,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:49,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) Word has length 17 [2021-08-29 03:14:49,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:49,976 INFO L225 Difference]: With dead ends: 83 [2021-08-29 03:14:49,976 INFO L226 Difference]: Without dead ends: 69 [2021-08-29 03:14:49,978 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.26ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:49,980 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.49ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 152.07ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:49,980 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 145 Unknown, 0 Unchecked, 1.49ms Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 152.07ms Time] [2021-08-29 03:14:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-29 03:14:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2021-08-29 03:14:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.8695652173913044) internal successors, (86), 46 states have internal predecessors, (86), 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 03:14:50,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 86 transitions. [2021-08-29 03:14:50,002 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 86 transitions. Word has length 17 [2021-08-29 03:14:50,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:50,002 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 86 transitions. [2021-08-29 03:14:50,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 03:14:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 86 transitions. [2021-08-29 03:14:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-29 03:14:50,003 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:50,003 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:50,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 03:14:50,004 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:50,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:50,005 INFO L82 PathProgramCache]: Analyzing trace with hash -433456741, now seen corresponding path program 1 times [2021-08-29 03:14:50,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:50,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916561831] [2021-08-29 03:14:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:50,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:50,042 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 03:14:50,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:50,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916561831] [2021-08-29 03:14:50,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916561831] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:50,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:50,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:50,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106559556] [2021-08-29 03:14:50,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:50,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:50,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:50,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:50,045 INFO L87 Difference]: Start difference. First operand 47 states and 86 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 03:14:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:50,152 INFO L93 Difference]: Finished difference Result 114 states and 209 transitions. [2021-08-29 03:14:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:50,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) Word has length 17 [2021-08-29 03:14:50,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:50,153 INFO L225 Difference]: With dead ends: 114 [2021-08-29 03:14:50,153 INFO L226 Difference]: Without dead ends: 69 [2021-08-29 03:14:50,154 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.03ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:50,154 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.98ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.83ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:50,155 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 0 Invalid, 150 Unknown, 0 Unchecked, 0.98ms Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 97.83ms Time] [2021-08-29 03:14:50,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-29 03:14:50,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2021-08-29 03:14:50,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.8484848484848484) internal successors, (122), 66 states have internal predecessors, (122), 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 03:14:50,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 122 transitions. [2021-08-29 03:14:50,161 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 122 transitions. Word has length 17 [2021-08-29 03:14:50,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:50,161 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 122 transitions. [2021-08-29 03:14:50,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 03:14:50,162 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 122 transitions. [2021-08-29 03:14:50,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-29 03:14:50,170 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:50,170 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:50,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 03:14:50,171 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:50,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:50,171 INFO L82 PathProgramCache]: Analyzing trace with hash 459073515, now seen corresponding path program 1 times [2021-08-29 03:14:50,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:50,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783546070] [2021-08-29 03:14:50,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:50,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:50,199 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 03:14:50,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:50,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783546070] [2021-08-29 03:14:50,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783546070] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:50,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:50,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:50,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853500179] [2021-08-29 03:14:50,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:50,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:50,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:50,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:50,202 INFO L87 Difference]: Start difference. First operand 67 states and 122 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 03:14:50,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:50,313 INFO L93 Difference]: Finished difference Result 105 states and 186 transitions. [2021-08-29 03:14:50,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:50,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) Word has length 18 [2021-08-29 03:14:50,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:50,316 INFO L225 Difference]: With dead ends: 105 [2021-08-29 03:14:50,316 INFO L226 Difference]: Without dead ends: 72 [2021-08-29 03:14:50,317 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.50ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:50,321 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.46ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.97ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:50,322 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 0 Invalid, 166 Unknown, 0 Unchecked, 1.46ms Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 96.97ms Time] [2021-08-29 03:14:50,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-29 03:14:50,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-08-29 03:14:50,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.7971014492753623) internal successors, (124), 69 states have internal predecessors, (124), 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 03:14:50,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 124 transitions. [2021-08-29 03:14:50,339 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 124 transitions. Word has length 18 [2021-08-29 03:14:50,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:50,339 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 124 transitions. [2021-08-29 03:14:50,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 03:14:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 124 transitions. [2021-08-29 03:14:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-29 03:14:50,341 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:50,341 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:50,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-29 03:14:50,341 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:50,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:50,342 INFO L82 PathProgramCache]: Analyzing trace with hash -552043735, now seen corresponding path program 1 times [2021-08-29 03:14:50,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:50,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330374381] [2021-08-29 03:14:50,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:50,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:50,396 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 03:14:50,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:50,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330374381] [2021-08-29 03:14:50,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330374381] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:50,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:50,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:50,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249687251] [2021-08-29 03:14:50,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:50,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:50,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:50,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:50,399 INFO L87 Difference]: Start difference. First operand 70 states and 124 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 03:14:50,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:50,501 INFO L93 Difference]: Finished difference Result 133 states and 237 transitions. [2021-08-29 03:14:50,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:50,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) Word has length 18 [2021-08-29 03:14:50,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:50,502 INFO L225 Difference]: With dead ends: 133 [2021-08-29 03:14:50,502 INFO L226 Difference]: Without dead ends: 131 [2021-08-29 03:14:50,502 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.24ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:50,503 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.70ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.28ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:50,504 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 131 Unknown, 0 Unchecked, 0.70ms Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 92.28ms Time] [2021-08-29 03:14:50,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-08-29 03:14:50,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2021-08-29 03:14:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.7934782608695652) internal successors, (165), 92 states have internal predecessors, (165), 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 03:14:50,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 165 transitions. [2021-08-29 03:14:50,508 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 165 transitions. Word has length 18 [2021-08-29 03:14:50,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:50,509 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 165 transitions. [2021-08-29 03:14:50,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 03:14:50,509 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 165 transitions. [2021-08-29 03:14:50,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-29 03:14:50,510 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:50,510 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:50,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-29 03:14:50,510 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:50,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:50,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1138849749, now seen corresponding path program 1 times [2021-08-29 03:14:50,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:50,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676504921] [2021-08-29 03:14:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:50,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:50,535 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 03:14:50,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:50,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676504921] [2021-08-29 03:14:50,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676504921] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:50,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:50,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:50,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725568278] [2021-08-29 03:14:50,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:50,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:50,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:50,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:50,538 INFO L87 Difference]: Start difference. First operand 93 states and 165 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 03:14:50,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:50,637 INFO L93 Difference]: Finished difference Result 221 states and 395 transitions. [2021-08-29 03:14:50,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:50,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) Word has length 18 [2021-08-29 03:14:50,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:50,638 INFO L225 Difference]: With dead ends: 221 [2021-08-29 03:14:50,638 INFO L226 Difference]: Without dead ends: 133 [2021-08-29 03:14:50,639 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.61ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:50,639 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.58ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.47ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:50,639 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 151 Unknown, 0 Unchecked, 0.58ms Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 93.47ms Time] [2021-08-29 03:14:50,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-29 03:14:50,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2021-08-29 03:14:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.7769230769230768) internal successors, (231), 130 states have internal predecessors, (231), 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 03:14:50,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 231 transitions. [2021-08-29 03:14:50,644 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 231 transitions. Word has length 18 [2021-08-29 03:14:50,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:50,645 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 231 transitions. [2021-08-29 03:14:50,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 03:14:50,645 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 231 transitions. [2021-08-29 03:14:50,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-29 03:14:50,646 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:50,646 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:50,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-29 03:14:50,646 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:50,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:50,647 INFO L82 PathProgramCache]: Analyzing trace with hash 66727088, now seen corresponding path program 1 times [2021-08-29 03:14:50,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:50,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915554044] [2021-08-29 03:14:50,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:50,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:50,667 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 03:14:50,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:50,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915554044] [2021-08-29 03:14:50,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915554044] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:50,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:50,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:50,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740142305] [2021-08-29 03:14:50,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:50,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:50,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:50,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:50,669 INFO L87 Difference]: Start difference. First operand 131 states and 231 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 03:14:50,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:50,769 INFO L93 Difference]: Finished difference Result 198 states and 346 transitions. [2021-08-29 03:14:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:50,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) Word has length 19 [2021-08-29 03:14:50,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:50,770 INFO L225 Difference]: With dead ends: 198 [2021-08-29 03:14:50,770 INFO L226 Difference]: Without dead ends: 135 [2021-08-29 03:14:50,770 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.47ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:50,771 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.41ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94.92ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:50,771 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 162 Unknown, 0 Unchecked, 0.41ms Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 94.92ms Time] [2021-08-29 03:14:50,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-29 03:14:50,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2021-08-29 03:14:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.75) internal successors, (231), 132 states have internal predecessors, (231), 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 03:14:50,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 231 transitions. [2021-08-29 03:14:50,776 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 231 transitions. Word has length 19 [2021-08-29 03:14:50,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:50,776 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 231 transitions. [2021-08-29 03:14:50,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 03:14:50,777 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 231 transitions. [2021-08-29 03:14:50,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-29 03:14:50,777 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:50,778 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:50,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-29 03:14:50,778 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:50,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:50,778 INFO L82 PathProgramCache]: Analyzing trace with hash -944390162, now seen corresponding path program 1 times [2021-08-29 03:14:50,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:50,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763433723] [2021-08-29 03:14:50,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:50,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:50,796 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 03:14:50,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:50,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763433723] [2021-08-29 03:14:50,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763433723] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:50,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:50,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:50,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277435972] [2021-08-29 03:14:50,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:50,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:50,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:50,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:50,798 INFO L87 Difference]: Start difference. First operand 133 states and 231 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 03:14:50,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:50,885 INFO L93 Difference]: Finished difference Result 381 states and 665 transitions. [2021-08-29 03:14:50,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:50,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) Word has length 19 [2021-08-29 03:14:50,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:50,887 INFO L225 Difference]: With dead ends: 381 [2021-08-29 03:14:50,887 INFO L226 Difference]: Without dead ends: 255 [2021-08-29 03:14:50,888 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.46ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:50,888 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.30ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.21ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:50,888 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 134 Unknown, 0 Unchecked, 0.30ms Time], IncrementalHoareTripleChecker [2 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 81.21ms Time] [2021-08-29 03:14:50,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-08-29 03:14:50,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 253. [2021-08-29 03:14:50,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.7261904761904763) internal successors, (435), 252 states have internal predecessors, (435), 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 03:14:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 435 transitions. [2021-08-29 03:14:50,895 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 435 transitions. Word has length 19 [2021-08-29 03:14:50,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:50,896 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 435 transitions. [2021-08-29 03:14:50,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 03:14:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 435 transitions. [2021-08-29 03:14:50,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-29 03:14:50,897 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:50,897 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:50,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-29 03:14:50,897 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:50,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:50,898 INFO L82 PathProgramCache]: Analyzing trace with hash -357584148, now seen corresponding path program 1 times [2021-08-29 03:14:50,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:50,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844637649] [2021-08-29 03:14:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:50,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:50,915 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 03:14:50,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:50,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844637649] [2021-08-29 03:14:50,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844637649] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:50,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:50,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:50,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852936746] [2021-08-29 03:14:50,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:50,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:50,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:50,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:50,917 INFO L87 Difference]: Start difference. First operand 253 states and 435 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 03:14:51,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:51,018 INFO L93 Difference]: Finished difference Result 321 states and 557 transitions. [2021-08-29 03:14:51,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:51,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) Word has length 19 [2021-08-29 03:14:51,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:51,020 INFO L225 Difference]: With dead ends: 321 [2021-08-29 03:14:51,020 INFO L226 Difference]: Without dead ends: 319 [2021-08-29 03:14:51,020 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.47ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:51,021 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.39ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94.42ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:51,021 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 175 Unknown, 0 Unchecked, 0.39ms Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 94.42ms Time] [2021-08-29 03:14:51,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-08-29 03:14:51,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 253. [2021-08-29 03:14:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.7103174603174602) internal successors, (431), 252 states have internal predecessors, (431), 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 03:14:51,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 431 transitions. [2021-08-29 03:14:51,028 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 431 transitions. Word has length 19 [2021-08-29 03:14:51,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:51,028 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 431 transitions. [2021-08-29 03:14:51,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 03:14:51,029 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 431 transitions. [2021-08-29 03:14:51,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 03:14:51,030 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:51,030 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:51,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-29 03:14:51,030 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:51,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:51,031 INFO L82 PathProgramCache]: Analyzing trace with hash 788890080, now seen corresponding path program 1 times [2021-08-29 03:14:51,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:51,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564974327] [2021-08-29 03:14:51,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:51,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:51,047 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 03:14:51,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:51,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564974327] [2021-08-29 03:14:51,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564974327] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:51,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:51,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:51,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390633561] [2021-08-29 03:14:51,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:51,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:51,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:51,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:51,049 INFO L87 Difference]: Start difference. First operand 253 states and 431 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 03:14:51,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:51,132 INFO L93 Difference]: Finished difference Result 469 states and 809 transitions. [2021-08-29 03:14:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:51,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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) Word has length 20 [2021-08-29 03:14:51,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:51,134 INFO L225 Difference]: With dead ends: 469 [2021-08-29 03:14:51,134 INFO L226 Difference]: Without dead ends: 467 [2021-08-29 03:14:51,135 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.41ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:51,135 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.30ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.60ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:51,135 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 127 Unknown, 0 Unchecked, 0.30ms Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 76.60ms Time] [2021-08-29 03:14:51,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-08-29 03:14:51,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 353. [2021-08-29 03:14:51,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.6789772727272727) internal successors, (591), 352 states have internal predecessors, (591), 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 03:14:51,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 591 transitions. [2021-08-29 03:14:51,142 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 591 transitions. Word has length 20 [2021-08-29 03:14:51,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:51,142 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 591 transitions. [2021-08-29 03:14:51,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 03:14:51,143 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 591 transitions. [2021-08-29 03:14:51,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 03:14:51,143 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:51,143 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:51,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-29 03:14:51,144 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:51,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:51,144 INFO L82 PathProgramCache]: Analyzing trace with hash 202084066, now seen corresponding path program 1 times [2021-08-29 03:14:51,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:51,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922430227] [2021-08-29 03:14:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:51,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:51,160 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 03:14:51,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:51,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922430227] [2021-08-29 03:14:51,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922430227] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:51,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:51,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:51,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170424496] [2021-08-29 03:14:51,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:51,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:51,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:51,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:51,162 INFO L87 Difference]: Start difference. First operand 353 states and 591 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 03:14:51,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:51,259 INFO L93 Difference]: Finished difference Result 837 states and 1409 transitions. [2021-08-29 03:14:51,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:51,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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) Word has length 20 [2021-08-29 03:14:51,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:51,261 INFO L225 Difference]: With dead ends: 837 [2021-08-29 03:14:51,261 INFO L226 Difference]: Without dead ends: 491 [2021-08-29 03:14:51,262 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.42ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:51,262 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.34ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.59ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:51,263 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 153 Unknown, 0 Unchecked, 0.34ms Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 88.59ms Time] [2021-08-29 03:14:51,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-08-29 03:14:51,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 489. [2021-08-29 03:14:51,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 1.6618852459016393) internal successors, (811), 488 states have internal predecessors, (811), 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 03:14:51,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 811 transitions. [2021-08-29 03:14:51,272 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 811 transitions. Word has length 20 [2021-08-29 03:14:51,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:51,272 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 811 transitions. [2021-08-29 03:14:51,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 03:14:51,272 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 811 transitions. [2021-08-29 03:14:51,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-29 03:14:51,273 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:51,273 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:51,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-29 03:14:51,273 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:51,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:51,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1313996925, now seen corresponding path program 1 times [2021-08-29 03:14:51,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:51,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768017584] [2021-08-29 03:14:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:51,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:51,289 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 03:14:51,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:51,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768017584] [2021-08-29 03:14:51,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768017584] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:51,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:51,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:51,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418587200] [2021-08-29 03:14:51,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:51,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:51,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:51,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:51,291 INFO L87 Difference]: Start difference. First operand 489 states and 811 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 03:14:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:51,385 INFO L93 Difference]: Finished difference Result 741 states and 1225 transitions. [2021-08-29 03:14:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:51,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-29 03:14:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:51,387 INFO L225 Difference]: With dead ends: 741 [2021-08-29 03:14:51,387 INFO L226 Difference]: Without dead ends: 503 [2021-08-29 03:14:51,388 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.37ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:51,388 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.39ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.34ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:51,388 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 154 Unknown, 0 Unchecked, 0.39ms Time], IncrementalHoareTripleChecker [1 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 86.34ms Time] [2021-08-29 03:14:51,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-29 03:14:51,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 501. [2021-08-29 03:14:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.638) internal successors, (819), 500 states have internal predecessors, (819), 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 03:14:51,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 819 transitions. [2021-08-29 03:14:51,396 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 819 transitions. Word has length 21 [2021-08-29 03:14:51,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:51,396 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 819 transitions. [2021-08-29 03:14:51,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 03:14:51,397 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 819 transitions. [2021-08-29 03:14:51,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-29 03:14:51,397 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:51,398 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:51,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-29 03:14:51,398 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:51,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:51,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1969853121, now seen corresponding path program 1 times [2021-08-29 03:14:51,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:51,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050270447] [2021-08-29 03:14:51,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:51,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:51,412 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 03:14:51,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:51,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050270447] [2021-08-29 03:14:51,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050270447] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:51,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:51,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:51,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397789930] [2021-08-29 03:14:51,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:51,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:51,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:51,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:51,414 INFO L87 Difference]: Start difference. First operand 501 states and 819 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 03:14:51,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:51,494 INFO L93 Difference]: Finished difference Result 905 states and 1501 transitions. [2021-08-29 03:14:51,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:51,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-29 03:14:51,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:51,497 INFO L225 Difference]: With dead ends: 905 [2021-08-29 03:14:51,497 INFO L226 Difference]: Without dead ends: 903 [2021-08-29 03:14:51,497 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.26ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:51,498 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.34ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.54ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:51,498 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 125 Unknown, 0 Unchecked, 0.34ms Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 70.54ms Time] [2021-08-29 03:14:51,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-08-29 03:14:51,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 709. [2021-08-29 03:14:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 1.597457627118644) internal successors, (1131), 708 states have internal predecessors, (1131), 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 03:14:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1131 transitions. [2021-08-29 03:14:51,509 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1131 transitions. Word has length 21 [2021-08-29 03:14:51,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:51,509 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 1131 transitions. [2021-08-29 03:14:51,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 03:14:51,509 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1131 transitions. [2021-08-29 03:14:51,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-29 03:14:51,510 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:51,510 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:51,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-29 03:14:51,511 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:51,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:51,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1383047107, now seen corresponding path program 1 times [2021-08-29 03:14:51,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:51,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214737664] [2021-08-29 03:14:51,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:51,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:51,524 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 03:14:51,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:51,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214737664] [2021-08-29 03:14:51,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214737664] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:51,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:51,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:51,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603036148] [2021-08-29 03:14:51,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:51,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:51,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:51,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:51,526 INFO L87 Difference]: Start difference. First operand 709 states and 1131 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 03:14:51,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:51,616 INFO L93 Difference]: Finished difference Result 1657 states and 2653 transitions. [2021-08-29 03:14:51,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:51,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-29 03:14:51,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:51,619 INFO L225 Difference]: With dead ends: 1657 [2021-08-29 03:14:51,619 INFO L226 Difference]: Without dead ends: 967 [2021-08-29 03:14:51,619 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.24ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:51,620 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.32ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.62ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:51,620 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 154 Unknown, 0 Unchecked, 0.32ms Time], IncrementalHoareTripleChecker [2 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 79.62ms Time] [2021-08-29 03:14:51,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-08-29 03:14:51,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 965. [2021-08-29 03:14:51,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 1.579875518672199) internal successors, (1523), 964 states have internal predecessors, (1523), 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 03:14:51,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1523 transitions. [2021-08-29 03:14:51,644 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1523 transitions. Word has length 21 [2021-08-29 03:14:51,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:51,644 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 1523 transitions. [2021-08-29 03:14:51,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 03:14:51,644 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1523 transitions. [2021-08-29 03:14:51,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 03:14:51,645 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:51,645 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:51,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-29 03:14:51,645 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:51,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:51,646 INFO L82 PathProgramCache]: Analyzing trace with hash 936119319, now seen corresponding path program 1 times [2021-08-29 03:14:51,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:51,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300177396] [2021-08-29 03:14:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:51,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:51,659 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 03:14:51,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:51,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300177396] [2021-08-29 03:14:51,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300177396] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:51,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:51,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:51,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551741422] [2021-08-29 03:14:51,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:51,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:51,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:51,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:51,661 INFO L87 Difference]: Start difference. First operand 965 states and 1523 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 03:14:51,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:51,764 INFO L93 Difference]: Finished difference Result 1449 states and 2277 transitions. [2021-08-29 03:14:51,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:51,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 03:14:51,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:51,767 INFO L225 Difference]: With dead ends: 1449 [2021-08-29 03:14:51,767 INFO L226 Difference]: Without dead ends: 983 [2021-08-29 03:14:51,768 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.27ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:51,768 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.35ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.53ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:51,768 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 150 Unknown, 0 Unchecked, 0.35ms Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 90.53ms Time] [2021-08-29 03:14:51,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-08-29 03:14:51,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 981. [2021-08-29 03:14:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.5540816326530613) internal successors, (1523), 980 states have internal predecessors, (1523), 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 03:14:51,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1523 transitions. [2021-08-29 03:14:51,788 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1523 transitions. Word has length 22 [2021-08-29 03:14:51,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:51,788 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1523 transitions. [2021-08-29 03:14:51,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 03:14:51,788 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1523 transitions. [2021-08-29 03:14:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 03:14:51,789 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:51,790 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:51,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-29 03:14:51,790 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:51,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:51,790 INFO L82 PathProgramCache]: Analyzing trace with hash -74997931, now seen corresponding path program 1 times [2021-08-29 03:14:51,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:51,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486789898] [2021-08-29 03:14:51,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:51,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:51,805 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 03:14:51,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:51,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486789898] [2021-08-29 03:14:51,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486789898] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:51,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:51,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:51,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572175962] [2021-08-29 03:14:51,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:51,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:51,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:51,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:51,808 INFO L87 Difference]: Start difference. First operand 981 states and 1523 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 03:14:51,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:51,892 INFO L93 Difference]: Finished difference Result 1737 states and 2741 transitions. [2021-08-29 03:14:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:51,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 03:14:51,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:51,897 INFO L225 Difference]: With dead ends: 1737 [2021-08-29 03:14:51,897 INFO L226 Difference]: Without dead ends: 1735 [2021-08-29 03:14:51,897 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.44ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:51,898 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.10ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:51,898 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 123 Unknown, 0 Unchecked, 0.32ms Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 69.10ms Time] [2021-08-29 03:14:51,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2021-08-29 03:14:51,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1413. [2021-08-29 03:14:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 1.5092067988668556) internal successors, (2131), 1412 states have internal predecessors, (2131), 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 03:14:51,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 2131 transitions. [2021-08-29 03:14:51,929 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 2131 transitions. Word has length 22 [2021-08-29 03:14:51,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:51,929 INFO L470 AbstractCegarLoop]: Abstraction has 1413 states and 2131 transitions. [2021-08-29 03:14:51,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 03:14:51,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 2131 transitions. [2021-08-29 03:14:51,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 03:14:51,930 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:51,931 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:51,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-29 03:14:51,931 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:51,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:51,931 INFO L82 PathProgramCache]: Analyzing trace with hash -661803945, now seen corresponding path program 1 times [2021-08-29 03:14:51,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:51,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008703489] [2021-08-29 03:14:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:51,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 03:14:51,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:51,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008703489] [2021-08-29 03:14:51,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008703489] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:51,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:51,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:51,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478613440] [2021-08-29 03:14:51,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:51,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:51,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:51,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:51,946 INFO L87 Difference]: Start difference. First operand 1413 states and 2131 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 03:14:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:52,049 INFO L93 Difference]: Finished difference Result 3273 states and 4949 transitions. [2021-08-29 03:14:52,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:52,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 03:14:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:52,053 INFO L225 Difference]: With dead ends: 3273 [2021-08-29 03:14:52,054 INFO L226 Difference]: Without dead ends: 1895 [2021-08-29 03:14:52,055 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.29ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:52,055 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.43ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.65ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:52,056 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 155 Unknown, 0 Unchecked, 0.43ms Time], IncrementalHoareTripleChecker [2 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 83.65ms Time] [2021-08-29 03:14:52,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-08-29 03:14:52,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1893. [2021-08-29 03:14:52,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 1.4899577167019027) internal successors, (2819), 1892 states have internal predecessors, (2819), 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 03:14:52,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 2819 transitions. [2021-08-29 03:14:52,084 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 2819 transitions. Word has length 22 [2021-08-29 03:14:52,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:52,084 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 2819 transitions. [2021-08-29 03:14:52,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 03:14:52,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 2819 transitions. [2021-08-29 03:14:52,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 03:14:52,085 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:52,085 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:52,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-29 03:14:52,086 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:52,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:52,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1970246488, now seen corresponding path program 1 times [2021-08-29 03:14:52,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:52,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596193754] [2021-08-29 03:14:52,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:52,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:52,098 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 03:14:52,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:52,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596193754] [2021-08-29 03:14:52,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596193754] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:52,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:52,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:52,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839906857] [2021-08-29 03:14:52,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:52,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:52,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:52,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:52,099 INFO L87 Difference]: Start difference. First operand 1893 states and 2819 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 03:14:52,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:52,208 INFO L93 Difference]: Finished difference Result 2841 states and 4213 transitions. [2021-08-29 03:14:52,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:52,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 23 [2021-08-29 03:14:52,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:52,212 INFO L225 Difference]: With dead ends: 2841 [2021-08-29 03:14:52,213 INFO L226 Difference]: Without dead ends: 1927 [2021-08-29 03:14:52,213 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.22ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:52,214 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.35ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.36ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:52,214 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 146 Unknown, 0 Unchecked, 0.35ms Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 84.36ms Time] [2021-08-29 03:14:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2021-08-29 03:14:52,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1925. [2021-08-29 03:14:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1925 states, 1924 states have (on average 1.4651767151767152) internal successors, (2819), 1924 states have internal predecessors, (2819), 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 03:14:52,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 2819 transitions. [2021-08-29 03:14:52,242 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 2819 transitions. Word has length 23 [2021-08-29 03:14:52,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:52,242 INFO L470 AbstractCegarLoop]: Abstraction has 1925 states and 2819 transitions. [2021-08-29 03:14:52,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 03:14:52,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 2819 transitions. [2021-08-29 03:14:52,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 03:14:52,244 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:52,244 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:52,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-29 03:14:52,245 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:52,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:52,245 INFO L82 PathProgramCache]: Analyzing trace with hash 959129238, now seen corresponding path program 1 times [2021-08-29 03:14:52,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:52,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066258967] [2021-08-29 03:14:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:52,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:52,257 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 03:14:52,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:52,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066258967] [2021-08-29 03:14:52,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066258967] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:52,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:52,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:52,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426104048] [2021-08-29 03:14:52,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:52,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:52,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:52,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:52,259 INFO L87 Difference]: Start difference. First operand 1925 states and 2819 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 03:14:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:52,338 INFO L93 Difference]: Finished difference Result 3337 states and 4965 transitions. [2021-08-29 03:14:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:52,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 23 [2021-08-29 03:14:52,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:52,346 INFO L225 Difference]: With dead ends: 3337 [2021-08-29 03:14:52,346 INFO L226 Difference]: Without dead ends: 3335 [2021-08-29 03:14:52,346 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.22ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:52,347 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.28ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.90ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:52,347 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.28ms Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 59.90ms Time] [2021-08-29 03:14:52,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2021-08-29 03:14:52,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 2821. [2021-08-29 03:14:52,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 2820 states have (on average 1.4195035460992909) internal successors, (4003), 2820 states have internal predecessors, (4003), 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 03:14:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 4003 transitions. [2021-08-29 03:14:52,393 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 4003 transitions. Word has length 23 [2021-08-29 03:14:52,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:52,393 INFO L470 AbstractCegarLoop]: Abstraction has 2821 states and 4003 transitions. [2021-08-29 03:14:52,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 03:14:52,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 4003 transitions. [2021-08-29 03:14:52,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 03:14:52,395 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:52,395 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:52,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-29 03:14:52,396 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:52,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:52,396 INFO L82 PathProgramCache]: Analyzing trace with hash 372323224, now seen corresponding path program 1 times [2021-08-29 03:14:52,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:52,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768253594] [2021-08-29 03:14:52,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:52,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:52,407 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 03:14:52,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:52,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768253594] [2021-08-29 03:14:52,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768253594] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:52,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:52,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:52,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565585968] [2021-08-29 03:14:52,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:52,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:52,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:52,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:52,409 INFO L87 Difference]: Start difference. First operand 2821 states and 4003 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 03:14:52,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:52,506 INFO L93 Difference]: Finished difference Result 6473 states and 9189 transitions. [2021-08-29 03:14:52,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:52,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 23 [2021-08-29 03:14:52,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:52,513 INFO L225 Difference]: With dead ends: 6473 [2021-08-29 03:14:52,513 INFO L226 Difference]: Without dead ends: 3719 [2021-08-29 03:14:52,515 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.25ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:52,516 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.31ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.80ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:52,516 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 156 Unknown, 0 Unchecked, 0.31ms Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 70.80ms Time] [2021-08-29 03:14:52,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-08-29 03:14:52,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3717. [2021-08-29 03:14:52,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3717 states, 3716 states have (on average 1.3958557588805167) internal successors, (5187), 3716 states have internal predecessors, (5187), 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 03:14:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3717 states to 3717 states and 5187 transitions. [2021-08-29 03:14:52,581 INFO L78 Accepts]: Start accepts. Automaton has 3717 states and 5187 transitions. Word has length 23 [2021-08-29 03:14:52,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:52,582 INFO L470 AbstractCegarLoop]: Abstraction has 3717 states and 5187 transitions. [2021-08-29 03:14:52,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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 03:14:52,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3717 states and 5187 transitions. [2021-08-29 03:14:52,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-29 03:14:52,584 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:52,584 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:52,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-29 03:14:52,584 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:52,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:52,585 INFO L82 PathProgramCache]: Analyzing trace with hash -331549300, now seen corresponding path program 1 times [2021-08-29 03:14:52,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:52,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125298061] [2021-08-29 03:14:52,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:52,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:52,596 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 03:14:52,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:52,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125298061] [2021-08-29 03:14:52,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125298061] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:52,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:52,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:52,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037611579] [2021-08-29 03:14:52,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:52,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:52,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:52,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:52,597 INFO L87 Difference]: Start difference. First operand 3717 states and 5187 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 03:14:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:52,690 INFO L93 Difference]: Finished difference Result 5577 states and 7749 transitions. [2021-08-29 03:14:52,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:52,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-29 03:14:52,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:52,698 INFO L225 Difference]: With dead ends: 5577 [2021-08-29 03:14:52,698 INFO L226 Difference]: Without dead ends: 3783 [2021-08-29 03:14:52,700 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.19ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:52,701 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.30ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.88ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:52,701 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 142 Unknown, 0 Unchecked, 0.30ms Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 68.88ms Time] [2021-08-29 03:14:52,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3783 states. [2021-08-29 03:14:52,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3783 to 3781. [2021-08-29 03:14:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3781 states, 3780 states have (on average 1.3722222222222222) internal successors, (5187), 3780 states have internal predecessors, (5187), 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 03:14:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3781 states to 3781 states and 5187 transitions. [2021-08-29 03:14:52,783 INFO L78 Accepts]: Start accepts. Automaton has 3781 states and 5187 transitions. Word has length 24 [2021-08-29 03:14:52,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:52,783 INFO L470 AbstractCegarLoop]: Abstraction has 3781 states and 5187 transitions. [2021-08-29 03:14:52,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 03:14:52,783 INFO L276 IsEmpty]: Start isEmpty. Operand 3781 states and 5187 transitions. [2021-08-29 03:14:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-29 03:14:52,785 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:52,785 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:52,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-29 03:14:52,785 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:52,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:52,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1342666550, now seen corresponding path program 1 times [2021-08-29 03:14:52,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:52,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983385746] [2021-08-29 03:14:52,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:52,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:52,797 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 03:14:52,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:52,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983385746] [2021-08-29 03:14:52,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983385746] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:52,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:52,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:52,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489141321] [2021-08-29 03:14:52,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:52,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:52,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:52,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:52,799 INFO L87 Difference]: Start difference. First operand 3781 states and 5187 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 03:14:52,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:52,885 INFO L93 Difference]: Finished difference Result 6409 states and 8901 transitions. [2021-08-29 03:14:52,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:52,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-29 03:14:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:52,897 INFO L225 Difference]: With dead ends: 6409 [2021-08-29 03:14:52,897 INFO L226 Difference]: Without dead ends: 6407 [2021-08-29 03:14:52,898 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.18ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:52,899 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.30ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.98ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:52,899 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 119 Unknown, 0 Unchecked, 0.30ms Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 53.98ms Time] [2021-08-29 03:14:52,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6407 states. [2021-08-29 03:14:52,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6407 to 5637. [2021-08-29 03:14:52,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5637 states, 5636 states have (on average 1.3291341376863024) internal successors, (7491), 5636 states have internal predecessors, (7491), 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 03:14:52,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5637 states to 5637 states and 7491 transitions. [2021-08-29 03:14:52,986 INFO L78 Accepts]: Start accepts. Automaton has 5637 states and 7491 transitions. Word has length 24 [2021-08-29 03:14:52,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:52,987 INFO L470 AbstractCegarLoop]: Abstraction has 5637 states and 7491 transitions. [2021-08-29 03:14:52,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 03:14:52,987 INFO L276 IsEmpty]: Start isEmpty. Operand 5637 states and 7491 transitions. [2021-08-29 03:14:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-29 03:14:52,991 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:52,991 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:52,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-29 03:14:52,991 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:52,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:52,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1929472564, now seen corresponding path program 1 times [2021-08-29 03:14:52,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:52,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311426278] [2021-08-29 03:14:52,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:52,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:53,002 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 03:14:53,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:53,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311426278] [2021-08-29 03:14:53,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311426278] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:53,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:53,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:53,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445717942] [2021-08-29 03:14:53,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:53,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:53,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:53,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:53,004 INFO L87 Difference]: Start difference. First operand 5637 states and 7491 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 03:14:53,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:53,132 INFO L93 Difference]: Finished difference Result 12809 states and 16965 transitions. [2021-08-29 03:14:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:53,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-29 03:14:53,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:53,140 INFO L225 Difference]: With dead ends: 12809 [2021-08-29 03:14:53,140 INFO L226 Difference]: Without dead ends: 7303 [2021-08-29 03:14:53,143 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.23ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:53,143 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.33ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.32ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:53,144 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 157 Unknown, 0 Unchecked, 0.33ms Time], IncrementalHoareTripleChecker [2 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 87.32ms Time] [2021-08-29 03:14:53,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7303 states. [2021-08-29 03:14:53,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7303 to 7301. [2021-08-29 03:14:53,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7301 states, 7300 states have (on average 1.297945205479452) internal successors, (9475), 7300 states have internal predecessors, (9475), 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 03:14:53,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7301 states to 7301 states and 9475 transitions. [2021-08-29 03:14:53,251 INFO L78 Accepts]: Start accepts. Automaton has 7301 states and 9475 transitions. Word has length 24 [2021-08-29 03:14:53,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:53,252 INFO L470 AbstractCegarLoop]: Abstraction has 7301 states and 9475 transitions. [2021-08-29 03:14:53,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 03:14:53,252 INFO L276 IsEmpty]: Start isEmpty. Operand 7301 states and 9475 transitions. [2021-08-29 03:14:53,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-29 03:14:53,286 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:53,286 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:53,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-29 03:14:53,286 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:53,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:53,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1327225645, now seen corresponding path program 1 times [2021-08-29 03:14:53,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:53,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577930628] [2021-08-29 03:14:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:53,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:53,301 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 03:14:53,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:53,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577930628] [2021-08-29 03:14:53,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577930628] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:53,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:53,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:53,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124920646] [2021-08-29 03:14:53,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:53,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:53,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:53,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:53,303 INFO L87 Difference]: Start difference. First operand 7301 states and 9475 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 03:14:53,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:53,414 INFO L93 Difference]: Finished difference Result 10953 states and 14149 transitions. [2021-08-29 03:14:53,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:53,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) Word has length 25 [2021-08-29 03:14:53,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:53,423 INFO L225 Difference]: With dead ends: 10953 [2021-08-29 03:14:53,423 INFO L226 Difference]: Without dead ends: 7431 [2021-08-29 03:14:53,426 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.22ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:53,427 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.32ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.33ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:53,427 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 138 Unknown, 0 Unchecked, 0.32ms Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 61.33ms Time] [2021-08-29 03:14:53,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7431 states. [2021-08-29 03:14:53,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7431 to 7429. [2021-08-29 03:14:53,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7429 states, 7428 states have (on average 1.2755788906838987) internal successors, (9475), 7428 states have internal predecessors, (9475), 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 03:14:53,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7429 states to 7429 states and 9475 transitions. [2021-08-29 03:14:53,590 INFO L78 Accepts]: Start accepts. Automaton has 7429 states and 9475 transitions. Word has length 25 [2021-08-29 03:14:53,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:53,590 INFO L470 AbstractCegarLoop]: Abstraction has 7429 states and 9475 transitions. [2021-08-29 03:14:53,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 03:14:53,591 INFO L276 IsEmpty]: Start isEmpty. Operand 7429 states and 9475 transitions. [2021-08-29 03:14:53,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-29 03:14:53,595 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:53,595 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:53,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-29 03:14:53,595 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:53,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:53,595 INFO L82 PathProgramCache]: Analyzing trace with hash 316108395, now seen corresponding path program 1 times [2021-08-29 03:14:53,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:53,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019547534] [2021-08-29 03:14:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:53,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:53,606 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 03:14:53,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:53,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019547534] [2021-08-29 03:14:53,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019547534] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:53,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:53,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:53,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791230091] [2021-08-29 03:14:53,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:53,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:53,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:53,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:53,607 INFO L87 Difference]: Start difference. First operand 7429 states and 9475 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 03:14:53,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:53,719 INFO L93 Difference]: Finished difference Result 12297 states and 15749 transitions. [2021-08-29 03:14:53,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:53,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) Word has length 25 [2021-08-29 03:14:53,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:53,732 INFO L225 Difference]: With dead ends: 12297 [2021-08-29 03:14:53,732 INFO L226 Difference]: Without dead ends: 12295 [2021-08-29 03:14:53,734 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.21ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:53,735 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.26ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.81ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:53,735 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 117 Unknown, 0 Unchecked, 0.26ms Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 47.81ms Time] [2021-08-29 03:14:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12295 states. [2021-08-29 03:14:53,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12295 to 11269. [2021-08-29 03:14:53,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11269 states, 11268 states have (on average 1.238462903798367) internal successors, (13955), 11268 states have internal predecessors, (13955), 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 03:14:53,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 13955 transitions. [2021-08-29 03:14:53,914 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 13955 transitions. Word has length 25 [2021-08-29 03:14:53,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:53,915 INFO L470 AbstractCegarLoop]: Abstraction has 11269 states and 13955 transitions. [2021-08-29 03:14:53,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 03:14:53,915 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 13955 transitions. [2021-08-29 03:14:53,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-29 03:14:53,923 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:53,923 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:53,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-29 03:14:53,923 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:53,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:53,923 INFO L82 PathProgramCache]: Analyzing trace with hash -270697619, now seen corresponding path program 1 times [2021-08-29 03:14:53,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:53,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624712052] [2021-08-29 03:14:53,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:53,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:53,934 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 03:14:53,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:53,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624712052] [2021-08-29 03:14:53,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624712052] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:53,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:53,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:53,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414023827] [2021-08-29 03:14:53,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:53,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:53,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:53,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:53,936 INFO L87 Difference]: Start difference. First operand 11269 states and 13955 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 03:14:54,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:54,121 INFO L93 Difference]: Finished difference Result 25353 states and 31109 transitions. [2021-08-29 03:14:54,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:54,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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) Word has length 25 [2021-08-29 03:14:54,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:54,135 INFO L225 Difference]: With dead ends: 25353 [2021-08-29 03:14:54,135 INFO L226 Difference]: Without dead ends: 14343 [2021-08-29 03:14:54,143 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.19ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:54,143 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.32ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.13ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:54,144 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 158 Unknown, 0 Unchecked, 0.32ms Time], IncrementalHoareTripleChecker [2 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 61.13ms Time] [2021-08-29 03:14:54,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14343 states. [2021-08-29 03:14:54,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14343 to 14341. [2021-08-29 03:14:54,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14341 states, 14340 states have (on average 1.1963040446304045) internal successors, (17155), 14340 states have internal predecessors, (17155), 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 03:14:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14341 states to 14341 states and 17155 transitions. [2021-08-29 03:14:54,402 INFO L78 Accepts]: Start accepts. Automaton has 14341 states and 17155 transitions. Word has length 25 [2021-08-29 03:14:54,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:54,403 INFO L470 AbstractCegarLoop]: Abstraction has 14341 states and 17155 transitions. [2021-08-29 03:14:54,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 03:14:54,403 INFO L276 IsEmpty]: Start isEmpty. Operand 14341 states and 17155 transitions. [2021-08-29 03:14:54,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-29 03:14:54,413 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:54,413 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:54,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-29 03:14:54,413 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:54,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1209641729, now seen corresponding path program 1 times [2021-08-29 03:14:54,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:54,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386673385] [2021-08-29 03:14:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:54,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:54,425 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 03:14:54,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:54,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386673385] [2021-08-29 03:14:54,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386673385] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:54,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:54,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:54,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278844612] [2021-08-29 03:14:54,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:54,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:54,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:54,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:54,427 INFO L87 Difference]: Start difference. First operand 14341 states and 17155 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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 03:14:54,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:54,585 INFO L93 Difference]: Finished difference Result 21513 states and 25605 transitions. [2021-08-29 03:14:54,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:54,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) Word has length 26 [2021-08-29 03:14:54,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:54,601 INFO L225 Difference]: With dead ends: 21513 [2021-08-29 03:14:54,601 INFO L226 Difference]: Without dead ends: 14599 [2021-08-29 03:14:54,608 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.28ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:54,609 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.33ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.63ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:54,609 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 134 Unknown, 0 Unchecked, 0.33ms Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 60.63ms Time] [2021-08-29 03:14:54,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14599 states. [2021-08-29 03:14:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14599 to 14597. [2021-08-29 03:14:54,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14597 states, 14596 states have (on average 1.175322006029049) internal successors, (17155), 14596 states have internal predecessors, (17155), 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 03:14:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14597 states to 14597 states and 17155 transitions. [2021-08-29 03:14:54,905 INFO L78 Accepts]: Start accepts. Automaton has 14597 states and 17155 transitions. Word has length 26 [2021-08-29 03:14:54,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:54,905 INFO L470 AbstractCegarLoop]: Abstraction has 14597 states and 17155 transitions. [2021-08-29 03:14:54,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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 03:14:54,906 INFO L276 IsEmpty]: Start isEmpty. Operand 14597 states and 17155 transitions. [2021-08-29 03:14:54,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-29 03:14:54,914 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:54,914 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:54,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-29 03:14:54,915 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:54,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:54,915 INFO L82 PathProgramCache]: Analyzing trace with hash 198524479, now seen corresponding path program 1 times [2021-08-29 03:14:54,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:54,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069829562] [2021-08-29 03:14:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:54,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:54,925 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 03:14:54,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:54,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069829562] [2021-08-29 03:14:54,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069829562] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:54,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:54,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:54,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616525686] [2021-08-29 03:14:54,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:54,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:54,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:54,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:54,927 INFO L87 Difference]: Start difference. First operand 14597 states and 17155 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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 03:14:55,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:55,104 INFO L93 Difference]: Finished difference Result 23559 states and 27396 transitions. [2021-08-29 03:14:55,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:55,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) Word has length 26 [2021-08-29 03:14:55,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:55,133 INFO L225 Difference]: With dead ends: 23559 [2021-08-29 03:14:55,133 INFO L226 Difference]: Without dead ends: 23557 [2021-08-29 03:14:55,139 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.18ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:55,140 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.26ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.54ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:55,140 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 114 Unknown, 0 Unchecked, 0.26ms Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 45.54ms Time] [2021-08-29 03:14:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23557 states. [2021-08-29 03:14:55,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23557 to 22533. [2021-08-29 03:14:55,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22533 states, 22532 states have (on average 1.1476566660749157) internal successors, (25859), 22532 states have internal predecessors, (25859), 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 03:14:55,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22533 states to 22533 states and 25859 transitions. [2021-08-29 03:14:55,598 INFO L78 Accepts]: Start accepts. Automaton has 22533 states and 25859 transitions. Word has length 26 [2021-08-29 03:14:55,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:55,599 INFO L470 AbstractCegarLoop]: Abstraction has 22533 states and 25859 transitions. [2021-08-29 03:14:55,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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 03:14:55,599 INFO L276 IsEmpty]: Start isEmpty. Operand 22533 states and 25859 transitions. [2021-08-29 03:14:55,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-29 03:14:55,622 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 03:14:55,622 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 03:14:55,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-08-29 03:14:55,622 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 03:14:55,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 03:14:55,623 INFO L82 PathProgramCache]: Analyzing trace with hash -388281535, now seen corresponding path program 1 times [2021-08-29 03:14:55,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 03:14:55,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282332275] [2021-08-29 03:14:55,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 03:14:55,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 03:14:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 03:14:55,633 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 03:14:55,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 03:14:55,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282332275] [2021-08-29 03:14:55,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282332275] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 03:14:55,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 03:14:55,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 03:14:55,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104683926] [2021-08-29 03:14:55,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 03:14:55,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 03:14:55,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 03:14:55,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:55,635 INFO L87 Difference]: Start difference. First operand 22533 states and 25859 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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 03:14:55,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 03:14:55,992 INFO L93 Difference]: Finished difference Result 50181 states and 56579 transitions. [2021-08-29 03:14:55,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 03:14:55,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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) Word has length 26 [2021-08-29 03:14:55,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 03:14:55,993 INFO L225 Difference]: With dead ends: 50181 [2021-08-29 03:14:55,993 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 03:14:56,017 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.22ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 03:14:56,018 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.34ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.87ms IncrementalHoareTripleChecker+Time [2021-08-29 03:14:56,018 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 157 Unknown, 0 Unchecked, 0.34ms Time], IncrementalHoareTripleChecker [2 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 90.87ms Time] [2021-08-29 03:14:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 03:14:56,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 03:14:56,019 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 03:14:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 03:14:56,019 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-08-29 03:14:56,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 03:14:56,019 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 03:14:56,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 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 03:14:56,020 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 03:14:56,020 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 03:14:56,022 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 03:14:56,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-29 03:14:56,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 03:14:56,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 03:14:56,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 03:14:56,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 03:14:56,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 03:14:56,039 INFO L858 garLoopResultBuilder]: For program point L126(line 126) no Hoare annotation was computed. [2021-08-29 03:14:56,039 INFO L858 garLoopResultBuilder]: For program point L151(line 151) no Hoare annotation was computed. [2021-08-29 03:14:56,039 INFO L858 garLoopResultBuilder]: For program point L110-1(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,040 INFO L858 garLoopResultBuilder]: For program point L135-1(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,040 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 03:14:56,040 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 03:14:56,040 INFO L858 garLoopResultBuilder]: For program point L111(line 111) no Hoare annotation was computed. [2021-08-29 03:14:56,040 INFO L858 garLoopResultBuilder]: For program point L136(line 136) no Hoare annotation was computed. [2021-08-29 03:14:56,040 INFO L861 garLoopResultBuilder]: At program point L161(lines 7 165) the Hoare annotation is: true [2021-08-29 03:14:56,041 INFO L858 garLoopResultBuilder]: For program point L120-1(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,041 INFO L858 garLoopResultBuilder]: For program point L145-1(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,041 INFO L858 garLoopResultBuilder]: For program point L104-1(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,041 INFO L858 garLoopResultBuilder]: For program point L96-1(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,041 INFO L858 garLoopResultBuilder]: For program point L121(line 121) no Hoare annotation was computed. [2021-08-29 03:14:56,041 INFO L858 garLoopResultBuilder]: For program point L88-1(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,041 INFO L858 garLoopResultBuilder]: For program point L146(line 146) no Hoare annotation was computed. [2021-08-29 03:14:56,041 INFO L858 garLoopResultBuilder]: For program point L80-1(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,041 INFO L858 garLoopResultBuilder]: For program point L72-1(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,041 INFO L858 garLoopResultBuilder]: For program point L130-1(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,042 INFO L861 garLoopResultBuilder]: At program point L155-1(lines 41 160) the Hoare annotation is: true [2021-08-29 03:14:56,042 INFO L861 garLoopResultBuilder]: At program point L164(lines 6 165) the Hoare annotation is: true [2021-08-29 03:14:56,042 INFO L858 garLoopResultBuilder]: For program point L131(line 131) no Hoare annotation was computed. [2021-08-29 03:14:56,042 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 03:14:56,042 INFO L858 garLoopResultBuilder]: For program point L156(line 156) no Hoare annotation was computed. [2021-08-29 03:14:56,042 INFO L854 garLoopResultBuilder]: At program point L156-1(lines 7 165) the Hoare annotation is: false [2021-08-29 03:14:56,042 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 163) no Hoare annotation was computed. [2021-08-29 03:14:56,042 INFO L858 garLoopResultBuilder]: For program point L115-1(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,042 INFO L858 garLoopResultBuilder]: For program point L140-1(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,043 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 03:14:56,043 INFO L858 garLoopResultBuilder]: For program point L116(line 116) no Hoare annotation was computed. [2021-08-29 03:14:56,043 INFO L858 garLoopResultBuilder]: For program point L141(line 141) no Hoare annotation was computed. [2021-08-29 03:14:56,043 INFO L858 garLoopResultBuilder]: For program point L100-1(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,043 INFO L858 garLoopResultBuilder]: For program point L125-1(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,043 INFO L858 garLoopResultBuilder]: For program point L92-1(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,043 INFO L858 garLoopResultBuilder]: For program point L150-1(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,043 INFO L858 garLoopResultBuilder]: For program point L84-1(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,043 INFO L858 garLoopResultBuilder]: For program point L43(lines 43 45) no Hoare annotation was computed. [2021-08-29 03:14:56,044 INFO L858 garLoopResultBuilder]: For program point L76-1(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,044 INFO L858 garLoopResultBuilder]: For program point L68(lines 68 70) no Hoare annotation was computed. [2021-08-29 03:14:56,044 INFO L858 garLoopResultBuilder]: For program point L68-2(lines 41 160) no Hoare annotation was computed. [2021-08-29 03:14:56,047 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 03:14:56,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 03:14:56 BoogieIcfgContainer [2021-08-29 03:14:56,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 03:14:56,056 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 03:14:56,056 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 03:14:56,057 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 03:14:56,057 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 03:14:49" (3/4) ... [2021-08-29 03:14:56,059 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 03:14:56,068 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-29 03:14:56,069 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 03:14:56,069 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 03:14:56,069 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 03:14:56,102 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 03:14:56,102 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 03:14:56,103 INFO L158 Benchmark]: Toolchain (without parser) took 7023.71ms. Allocated memory was 50.3MB in the beginning and 803.2MB in the end (delta: 752.9MB). Free memory was 25.8MB in the beginning and 463.8MB in the end (delta: -438.0MB). Peak memory consumption was 314.4MB. Max. memory is 16.1GB. [2021-08-29 03:14:56,103 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 50.3MB. Free memory was 32.3MB in the beginning and 32.2MB in the end (delta: 51.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 03:14:56,103 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.94ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 25.6MB in the beginning and 49.8MB in the end (delta: -24.2MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. [2021-08-29 03:14:56,103 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.50ms. Allocated memory is still 67.1MB. Free memory was 49.8MB in the beginning and 48.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 03:14:56,104 INFO L158 Benchmark]: Boogie Preprocessor took 36.14ms. Allocated memory is still 67.1MB. Free memory was 48.2MB in the beginning and 46.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 03:14:56,104 INFO L158 Benchmark]: RCFGBuilder took 152.09ms. Allocated memory is still 67.1MB. Free memory was 46.8MB in the beginning and 36.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-29 03:14:56,104 INFO L158 Benchmark]: TraceAbstraction took 6512.02ms. Allocated memory was 67.1MB in the beginning and 803.2MB in the end (delta: 736.1MB). Free memory was 36.2MB in the beginning and 468.0MB in the end (delta: -431.7MB). Peak memory consumption was 306.1MB. Max. memory is 16.1GB. [2021-08-29 03:14:56,105 INFO L158 Benchmark]: Witness Printer took 46.03ms. Allocated memory is still 803.2MB. Free memory was 468.0MB in the beginning and 463.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 03:14:56,111 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 50.3MB. Free memory was 32.3MB in the beginning and 32.2MB in the end (delta: 51.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 237.94ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 25.6MB in the beginning and 49.8MB in the end (delta: -24.2MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.50ms. Allocated memory is still 67.1MB. Free memory was 49.8MB in the beginning and 48.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 36.14ms. Allocated memory is still 67.1MB. Free memory was 48.2MB in the beginning and 46.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 152.09ms. Allocated memory is still 67.1MB. Free memory was 46.8MB in the beginning and 36.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 6512.02ms. Allocated memory was 67.1MB in the beginning and 803.2MB in the end (delta: 736.1MB). Free memory was 36.2MB in the beginning and 468.0MB in the end (delta: -431.7MB). Peak memory consumption was 306.1MB. Max. memory is 16.1GB. * Witness Printer took 46.03ms. Allocated memory is still 803.2MB. Free memory was 468.0MB in the beginning and 463.8MB in the end (delta: 4.2MB). 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: 163]: 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, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6456.93ms, OverallIterations: 28, TraceHistogramMax: 1, EmptinessCheckTime: 122.59ms, AutomataDifference: 3642.60ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 13.27ms, InitialAbstractionConstructionTime: 5.90ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1149 SdHoareTripleChecker+Valid, 2240.67ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1149 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1717.23ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1533 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3986 IncrementalHoareTripleChecker+Invalid, 4014 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 0 mSDtfsCounter, 3986 mSolverCounterSat, 12.80ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.35ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=22533occurred in iteration=27, InterpolantAutomatonStates: 84, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 1960.80ms AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 1033 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 4.05ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 1.66ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 28.54ms SsaConstructionTime, 138.72ms SatisfiabilityAnalysisTime, 335.91ms InterpolantComputationTime, 608 NumberOfCodeBlocks, 608 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 580 ConstructedInterpolants, 0 QuantifiedInterpolants, 1240 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 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: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-29 03:14:56,165 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...