./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i20_o20-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_i20_o20-2.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 25ea15f5ff8abe515b4cb496a6d70ce27fd2ceb9 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 23:11:57,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 23:11:57,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 23:11:57,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 23:11:57,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 23:11:57,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 23:11:57,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 23:11:57,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 23:11:57,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 23:11:57,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 23:11:57,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 23:11:57,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 23:11:57,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 23:11:57,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 23:11:57,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 23:11:57,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 23:11:57,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 23:11:57,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 23:11:57,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 23:11:57,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 23:11:57,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 23:11:57,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 23:11:57,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 23:11:57,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 23:11:57,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 23:11:57,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 23:11:57,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 23:11:57,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 23:11:57,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 23:11:57,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 23:11:57,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 23:11:57,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 23:11:57,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 23:11:57,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 23:11:57,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 23:11:57,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 23:11:57,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 23:11:57,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 23:11:57,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 23:11:57,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 23:11:57,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 23:11:57,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 23:11:57,513 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 23:11:57,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 23:11:57,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 23:11:57,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 23:11:57,518 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 23:11:57,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 23:11:57,519 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 23:11:57,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 23:11:57,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 23:11:57,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 23:11:57,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 23:11:57,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 23:11:57,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 23:11:57,522 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 23:11:57,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 23:11:57,522 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 23:11:57,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 23:11:57,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 23:11:57,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 23:11:57,523 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 23:11:57,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 23:11:57,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 23:11:57,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 23:11:57,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 23:11:57,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 23:11:57,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 23:11:57,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 23:11:57,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 23:11:57,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 23:11:57,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25ea15f5ff8abe515b4cb496a6d70ce27fd2ceb9 [2020-10-25 23:11:57,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 23:11:58,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 23:11:58,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 23:11:58,010 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 23:11:58,012 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 23:11:58,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i20_o20-2.c [2020-10-25 23:11:58,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/944345936/6bfb1172129749328d8fa9c365ac8d1b/FLAG61e5565c0 [2020-10-25 23:11:58,724 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 23:11:58,725 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i20_o20-2.c [2020-10-25 23:11:58,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/944345936/6bfb1172129749328d8fa9c365ac8d1b/FLAG61e5565c0 [2020-10-25 23:11:59,089 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/944345936/6bfb1172129749328d8fa9c365ac8d1b [2020-10-25 23:11:59,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 23:11:59,099 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 23:11:59,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 23:11:59,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 23:11:59,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 23:11:59,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 11:11:59" (1/1) ... [2020-10-25 23:11:59,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26d4701a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:59, skipping insertion in model container [2020-10-25 23:11:59,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 11:11:59" (1/1) ... [2020-10-25 23:11:59,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 23:11:59,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 23:11:59,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 23:11:59,377 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 23:11:59,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 23:11:59,411 INFO L208 MainTranslator]: Completed translation [2020-10-25 23:11:59,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:59 WrapperNode [2020-10-25 23:11:59,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 23:11:59,413 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 23:11:59,413 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 23:11:59,413 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 23:11:59,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:59" (1/1) ... [2020-10-25 23:11:59,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:59" (1/1) ... [2020-10-25 23:11:59,456 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 23:11:59,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 23:11:59,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 23:11:59,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 23:11:59,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:59" (1/1) ... [2020-10-25 23:11:59,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:59" (1/1) ... [2020-10-25 23:11:59,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:59" (1/1) ... [2020-10-25 23:11:59,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:59" (1/1) ... [2020-10-25 23:11:59,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:59" (1/1) ... [2020-10-25 23:11:59,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:59" (1/1) ... [2020-10-25 23:11:59,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:59" (1/1) ... [2020-10-25 23:11:59,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 23:11:59,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 23:11:59,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 23:11:59,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 23:11:59,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 23:11:59,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 23:11:59,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 23:11:59,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 23:11:59,551 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-25 23:11:59,551 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-25 23:11:59,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 23:11:59,966 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 23:11:59,967 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-25 23:11:59,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:11:59 BoogieIcfgContainer [2020-10-25 23:11:59,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 23:11:59,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 23:11:59,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 23:11:59,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 23:11:59,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 11:11:59" (1/3) ... [2020-10-25 23:11:59,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e33dfdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 11:11:59, skipping insertion in model container [2020-10-25 23:11:59,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:59" (2/3) ... [2020-10-25 23:11:59,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e33dfdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 11:11:59, skipping insertion in model container [2020-10-25 23:11:59,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:11:59" (3/3) ... [2020-10-25 23:11:59,984 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i20_o20-2.c [2020-10-25 23:11:59,996 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 23:12:00,001 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 23:12:00,018 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 23:12:00,049 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 23:12:00,049 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 23:12:00,049 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 23:12:00,049 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 23:12:00,049 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 23:12:00,050 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 23:12:00,050 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 23:12:00,050 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 23:12:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-25 23:12:00,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-25 23:12:00,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:00,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:00,081 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:00,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:00,091 INFO L82 PathProgramCache]: Analyzing trace with hash 666808458, now seen corresponding path program 1 times [2020-10-25 23:12:00,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:00,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733084995] [2020-10-25 23:12:00,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:00,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 23:12:00,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733084995] [2020-10-25 23:12:00,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 23:12:00,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-25 23:12:00,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855972589] [2020-10-25 23:12:00,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 23:12:00,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:00,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 23:12:00,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-25 23:12:00,499 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-10-25 23:12:00,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:00,548 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-10-25 23:12:00,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 23:12:00,550 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-25 23:12:00,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:00,560 INFO L225 Difference]: With dead ends: 29 [2020-10-25 23:12:00,560 INFO L226 Difference]: Without dead ends: 15 [2020-10-25 23:12:00,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-25 23:12:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-25 23:12:00,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-25 23:12:00,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-25 23:12:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-25 23:12:00,616 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-10-25 23:12:00,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:00,617 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-25 23:12:00,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 23:12:00,617 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-25 23:12:00,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-25 23:12:00,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:00,620 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:00,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 23:12:00,621 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:00,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:00,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1352629460, now seen corresponding path program 1 times [2020-10-25 23:12:00,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:00,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352913307] [2020-10-25 23:12:00,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:00,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:00,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-25 23:12:00,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352913307] [2020-10-25 23:12:00,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465784770] [2020-10-25 23:12:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:00,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-25 23:12:00,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-25 23:12:00,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:00,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-10-25 23:12:00,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699257146] [2020-10-25 23:12:00,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-25 23:12:00,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:00,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-25 23:12:00,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-25 23:12:00,914 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2020-10-25 23:12:00,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:00,988 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-10-25 23:12:00,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 23:12:00,989 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-25 23:12:00,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:00,990 INFO L225 Difference]: With dead ends: 22 [2020-10-25 23:12:00,990 INFO L226 Difference]: Without dead ends: 18 [2020-10-25 23:12:00,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-25 23:12:00,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-25 23:12:00,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-25 23:12:00,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-25 23:12:00,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-25 23:12:00,998 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-10-25 23:12:00,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:00,999 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-25 23:12:00,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-25 23:12:00,999 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-25 23:12:01,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-25 23:12:01,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:01,000 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:01,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-25 23:12:01,216 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:01,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:01,217 INFO L82 PathProgramCache]: Analyzing trace with hash 832070858, now seen corresponding path program 2 times [2020-10-25 23:12:01,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:01,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161789849] [2020-10-25 23:12:01,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:01,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:01,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:01,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:01,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-25 23:12:01,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161789849] [2020-10-25 23:12:01,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809960278] [2020-10-25 23:12:01,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:01,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 23:12:01,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:01,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-25 23:12:01,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-25 23:12:01,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:01,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-10-25 23:12:01,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167005141] [2020-10-25 23:12:01,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-25 23:12:01,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:01,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-25 23:12:01,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-25 23:12:01,588 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-10-25 23:12:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:01,661 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-10-25 23:12:01,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 23:12:01,662 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-25 23:12:01,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:01,664 INFO L225 Difference]: With dead ends: 25 [2020-10-25 23:12:01,664 INFO L226 Difference]: Without dead ends: 21 [2020-10-25 23:12:01,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-10-25 23:12:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-25 23:12:01,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-25 23:12:01,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-25 23:12:01,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-25 23:12:01,671 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-10-25 23:12:01,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:01,671 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-25 23:12:01,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-25 23:12:01,672 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-25 23:12:01,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-25 23:12:01,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:01,673 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:01,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:01,887 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:01,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1547641236, now seen corresponding path program 3 times [2020-10-25 23:12:01,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:01,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139975387] [2020-10-25 23:12:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:01,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:01,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:01,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:02,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-25 23:12:02,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139975387] [2020-10-25 23:12:02,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431216956] [2020-10-25 23:12:02,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:02,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-25 23:12:02,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:02,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-25 23:12:02,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-25 23:12:02,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:02,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2020-10-25 23:12:02,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821500875] [2020-10-25 23:12:02,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-25 23:12:02,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:02,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-25 23:12:02,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-25 23:12:02,248 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 17 states. [2020-10-25 23:12:02,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:02,443 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-25 23:12:02,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-25 23:12:02,444 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-25 23:12:02,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:02,445 INFO L225 Difference]: With dead ends: 28 [2020-10-25 23:12:02,445 INFO L226 Difference]: Without dead ends: 24 [2020-10-25 23:12:02,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-25 23:12:02,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-25 23:12:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-25 23:12:02,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-25 23:12:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-25 23:12:02,453 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-10-25 23:12:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:02,454 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-25 23:12:02,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-25 23:12:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-25 23:12:02,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-25 23:12:02,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:02,456 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:02,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:02,670 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:02,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:02,670 INFO L82 PathProgramCache]: Analyzing trace with hash -346978038, now seen corresponding path program 4 times [2020-10-25 23:12:02,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:02,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957556677] [2020-10-25 23:12:02,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:02,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:02,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:02,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:02,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:02,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:02,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-25 23:12:02,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957556677] [2020-10-25 23:12:02,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278439468] [2020-10-25 23:12:02,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:02,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 23:12:02,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:02,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-25 23:12:02,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-25 23:12:02,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:02,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-10-25 23:12:02,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869327578] [2020-10-25 23:12:02,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-25 23:12:02,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:02,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-25 23:12:02,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-25 23:12:02,988 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-10-25 23:12:03,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:03,081 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-25 23:12:03,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-25 23:12:03,081 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-25 23:12:03,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:03,083 INFO L225 Difference]: With dead ends: 31 [2020-10-25 23:12:03,083 INFO L226 Difference]: Without dead ends: 27 [2020-10-25 23:12:03,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-25 23:12:03,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-25 23:12:03,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-25 23:12:03,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-25 23:12:03,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-25 23:12:03,090 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-10-25 23:12:03,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:03,090 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-25 23:12:03,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-25 23:12:03,090 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-25 23:12:03,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-25 23:12:03,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:03,092 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:03,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:03,309 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:03,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:03,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1234184620, now seen corresponding path program 5 times [2020-10-25 23:12:03,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:03,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022622016] [2020-10-25 23:12:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:03,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:03,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:03,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:03,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:03,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:03,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-25 23:12:03,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022622016] [2020-10-25 23:12:03,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660332356] [2020-10-25 23:12:03,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:03,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-25 23:12:03,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:03,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-25 23:12:03,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-25 23:12:03,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:03,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-10-25 23:12:03,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138576860] [2020-10-25 23:12:03,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-25 23:12:03,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:03,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-25 23:12:03,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-25 23:12:03,671 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 12 states. [2020-10-25 23:12:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:03,777 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-25 23:12:03,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-25 23:12:03,778 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-25 23:12:03,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:03,779 INFO L225 Difference]: With dead ends: 34 [2020-10-25 23:12:03,779 INFO L226 Difference]: Without dead ends: 30 [2020-10-25 23:12:03,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-10-25 23:12:03,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-25 23:12:03,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-25 23:12:03,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-25 23:12:03,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-25 23:12:03,787 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-10-25 23:12:03,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:03,787 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-25 23:12:03,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-25 23:12:03,788 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-25 23:12:03,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-25 23:12:03,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:03,789 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:04,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-25 23:12:04,003 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:04,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:04,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1831214410, now seen corresponding path program 6 times [2020-10-25 23:12:04,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:04,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880323218] [2020-10-25 23:12:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:04,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:04,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:04,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:04,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:04,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:04,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:04,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-25 23:12:04,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880323218] [2020-10-25 23:12:04,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366517212] [2020-10-25 23:12:04,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:04,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-25 23:12:04,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:04,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-25 23:12:04,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-25 23:12:04,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:04,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2020-10-25 23:12:04,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530058722] [2020-10-25 23:12:04,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-25 23:12:04,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:04,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-25 23:12:04,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-10-25 23:12:04,679 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 26 states. [2020-10-25 23:12:05,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:05,160 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-25 23:12:05,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-25 23:12:05,161 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 46 [2020-10-25 23:12:05,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:05,162 INFO L225 Difference]: With dead ends: 37 [2020-10-25 23:12:05,163 INFO L226 Difference]: Without dead ends: 33 [2020-10-25 23:12:05,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2020-10-25 23:12:05,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-25 23:12:05,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-25 23:12:05,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-25 23:12:05,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-25 23:12:05,172 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-10-25 23:12:05,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:05,172 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-25 23:12:05,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-25 23:12:05,173 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-25 23:12:05,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-25 23:12:05,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:05,174 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:05,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:05,380 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:05,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:05,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1739954964, now seen corresponding path program 7 times [2020-10-25 23:12:05,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:05,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126482179] [2020-10-25 23:12:05,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:05,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:05,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:05,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:05,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:05,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:05,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:05,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:05,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:05,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-25 23:12:05,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126482179] [2020-10-25 23:12:05,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160497150] [2020-10-25 23:12:05,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:05,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-25 23:12:05,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-25 23:12:05,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:05,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-10-25 23:12:05,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762778163] [2020-10-25 23:12:05,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-25 23:12:05,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:05,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-25 23:12:05,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-10-25 23:12:05,771 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 14 states. [2020-10-25 23:12:05,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:05,905 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-25 23:12:05,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-25 23:12:05,906 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-10-25 23:12:05,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:05,908 INFO L225 Difference]: With dead ends: 40 [2020-10-25 23:12:05,908 INFO L226 Difference]: Without dead ends: 36 [2020-10-25 23:12:05,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-10-25 23:12:05,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-25 23:12:05,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-25 23:12:05,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-25 23:12:05,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-25 23:12:05,915 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-10-25 23:12:05,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:05,916 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-25 23:12:05,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-25 23:12:05,916 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-25 23:12:05,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-25 23:12:05,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:05,918 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:06,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:06,131 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:06,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:06,132 INFO L82 PathProgramCache]: Analyzing trace with hash -632151670, now seen corresponding path program 8 times [2020-10-25 23:12:06,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:06,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687356573] [2020-10-25 23:12:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:06,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:06,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:06,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:06,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:06,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:06,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:06,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:06,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:06,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-25 23:12:06,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687356573] [2020-10-25 23:12:06,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061778563] [2020-10-25 23:12:06,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:06,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 23:12:06,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:06,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-25 23:12:06,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-25 23:12:06,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:06,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-25 23:12:06,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394121643] [2020-10-25 23:12:06,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-25 23:12:06,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:06,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-25 23:12:06,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-25 23:12:06,561 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 15 states. [2020-10-25 23:12:06,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:06,732 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-10-25 23:12:06,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-25 23:12:06,732 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2020-10-25 23:12:06,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:06,733 INFO L225 Difference]: With dead ends: 43 [2020-10-25 23:12:06,734 INFO L226 Difference]: Without dead ends: 39 [2020-10-25 23:12:06,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-10-25 23:12:06,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-25 23:12:06,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-25 23:12:06,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-25 23:12:06,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-25 23:12:06,741 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-10-25 23:12:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:06,741 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-25 23:12:06,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-25 23:12:06,741 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-25 23:12:06,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-25 23:12:06,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:06,743 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:06,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-25 23:12:06,958 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:06,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:06,959 INFO L82 PathProgramCache]: Analyzing trace with hash 764702676, now seen corresponding path program 9 times [2020-10-25 23:12:06,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:06,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397304390] [2020-10-25 23:12:06,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:06,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:07,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:07,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:07,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:07,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:07,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:07,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:07,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:07,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:07,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-25 23:12:07,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397304390] [2020-10-25 23:12:07,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745622163] [2020-10-25 23:12:07,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:07,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-25 23:12:07,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:07,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-25 23:12:07,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-25 23:12:07,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:07,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2020-10-25 23:12:07,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463847302] [2020-10-25 23:12:07,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-25 23:12:07,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:07,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-25 23:12:07,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2020-10-25 23:12:07,967 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 35 states. [2020-10-25 23:12:08,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:08,578 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-25 23:12:08,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-25 23:12:08,579 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 64 [2020-10-25 23:12:08,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:08,580 INFO L225 Difference]: With dead ends: 46 [2020-10-25 23:12:08,581 INFO L226 Difference]: Without dead ends: 42 [2020-10-25 23:12:08,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2020-10-25 23:12:08,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-25 23:12:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-25 23:12:08,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-25 23:12:08,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-25 23:12:08,591 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-10-25 23:12:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:08,591 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-25 23:12:08,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-25 23:12:08,591 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-25 23:12:08,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-25 23:12:08,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:08,593 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:08,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:08,808 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:08,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:08,809 INFO L82 PathProgramCache]: Analyzing trace with hash 554800586, now seen corresponding path program 10 times [2020-10-25 23:12:08,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:08,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416021326] [2020-10-25 23:12:08,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:08,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:08,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:08,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:08,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:08,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:08,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:09,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:09,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:09,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:09,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:09,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-25 23:12:09,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416021326] [2020-10-25 23:12:09,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943446521] [2020-10-25 23:12:09,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:09,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 23:12:09,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:09,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-25 23:12:09,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-25 23:12:09,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:09,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-25 23:12:09,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810025632] [2020-10-25 23:12:09,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-25 23:12:09,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:09,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-25 23:12:09,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-10-25 23:12:09,347 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 17 states. [2020-10-25 23:12:09,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:09,538 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-25 23:12:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-25 23:12:09,539 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2020-10-25 23:12:09,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:09,540 INFO L225 Difference]: With dead ends: 49 [2020-10-25 23:12:09,541 INFO L226 Difference]: Without dead ends: 45 [2020-10-25 23:12:09,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-10-25 23:12:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-25 23:12:09,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-25 23:12:09,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-25 23:12:09,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-25 23:12:09,549 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-10-25 23:12:09,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:09,549 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-25 23:12:09,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-25 23:12:09,550 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-25 23:12:09,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-25 23:12:09,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:09,551 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:09,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:09,766 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:09,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:09,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1164946284, now seen corresponding path program 11 times [2020-10-25 23:12:09,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:09,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375988946] [2020-10-25 23:12:09,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:09,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:09,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:09,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:09,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:09,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:09,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:09,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:10,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:10,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:10,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:10,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:10,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-25 23:12:10,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375988946] [2020-10-25 23:12:10,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673619692] [2020-10-25 23:12:10,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:10,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-25 23:12:10,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:10,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-25 23:12:10,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-25 23:12:10,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:10,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-10-25 23:12:10,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146396751] [2020-10-25 23:12:10,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-25 23:12:10,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:10,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-25 23:12:10,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-10-25 23:12:10,329 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 18 states. [2020-10-25 23:12:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:10,522 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-10-25 23:12:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-25 23:12:10,522 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-10-25 23:12:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:10,523 INFO L225 Difference]: With dead ends: 52 [2020-10-25 23:12:10,523 INFO L226 Difference]: Without dead ends: 48 [2020-10-25 23:12:10,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-10-25 23:12:10,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-25 23:12:10,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-25 23:12:10,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-25 23:12:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-25 23:12:10,531 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2020-10-25 23:12:10,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:10,531 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-25 23:12:10,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-25 23:12:10,531 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-25 23:12:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-25 23:12:10,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:10,533 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:10,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-25 23:12:10,746 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:10,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:10,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1163888118, now seen corresponding path program 12 times [2020-10-25 23:12:10,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:10,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742340447] [2020-10-25 23:12:10,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:10,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:10,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:10,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:10,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:10,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:10,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:10,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:11,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:11,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:11,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:11,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:11,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:11,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-25 23:12:11,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742340447] [2020-10-25 23:12:11,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349488960] [2020-10-25 23:12:11,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:11,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-25 23:12:11,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:11,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-25 23:12:11,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-25 23:12:11,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:11,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-25 23:12:11,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600537560] [2020-10-25 23:12:11,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-25 23:12:11,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:11,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-25 23:12:11,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-10-25 23:12:11,438 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 19 states. [2020-10-25 23:12:11,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:11,673 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-10-25 23:12:11,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-25 23:12:11,676 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2020-10-25 23:12:11,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:11,677 INFO L225 Difference]: With dead ends: 55 [2020-10-25 23:12:11,677 INFO L226 Difference]: Without dead ends: 51 [2020-10-25 23:12:11,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2020-10-25 23:12:11,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-25 23:12:11,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-25 23:12:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-25 23:12:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-25 23:12:11,692 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2020-10-25 23:12:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:11,693 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-25 23:12:11,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-25 23:12:11,696 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-25 23:12:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-25 23:12:11,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:11,697 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:11,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-25 23:12:11,898 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:11,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:11,899 INFO L82 PathProgramCache]: Analyzing trace with hash -164804268, now seen corresponding path program 13 times [2020-10-25 23:12:11,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:11,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580683154] [2020-10-25 23:12:11,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:11,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:11,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:12,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:12,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:12,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:12,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:12,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:12,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:12,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:12,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:12,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:12,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:12,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:12,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-25 23:12:12,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580683154] [2020-10-25 23:12:12,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719723001] [2020-10-25 23:12:12,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:12,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-25 23:12:12,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-25 23:12:12,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:12,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-10-25 23:12:12,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356941717] [2020-10-25 23:12:12,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-25 23:12:12,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:12,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-25 23:12:12,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-10-25 23:12:12,668 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 20 states. [2020-10-25 23:12:12,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:12,949 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-10-25 23:12:12,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-25 23:12:12,950 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 88 [2020-10-25 23:12:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:12,951 INFO L225 Difference]: With dead ends: 58 [2020-10-25 23:12:12,951 INFO L226 Difference]: Without dead ends: 54 [2020-10-25 23:12:12,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-10-25 23:12:12,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-25 23:12:12,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-25 23:12:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-25 23:12:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-25 23:12:12,959 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2020-10-25 23:12:12,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:12,959 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-25 23:12:12,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-25 23:12:12,959 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-25 23:12:12,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-25 23:12:12,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:12,960 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:13,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-25 23:12:13,161 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:13,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:13,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1799016010, now seen corresponding path program 14 times [2020-10-25 23:12:13,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:13,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179459712] [2020-10-25 23:12:13,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-25 23:12:13,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179459712] [2020-10-25 23:12:13,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638815654] [2020-10-25 23:12:13,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:13,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 23:12:13,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:13,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-25 23:12:13,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-25 23:12:13,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:13,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-25 23:12:13,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558172013] [2020-10-25 23:12:13,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-25 23:12:13,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:13,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-25 23:12:13,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-10-25 23:12:13,988 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 21 states. [2020-10-25 23:12:14,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:14,265 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-25 23:12:14,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-25 23:12:14,266 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 94 [2020-10-25 23:12:14,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:14,267 INFO L225 Difference]: With dead ends: 61 [2020-10-25 23:12:14,268 INFO L226 Difference]: Without dead ends: 57 [2020-10-25 23:12:14,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2020-10-25 23:12:14,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-25 23:12:14,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-25 23:12:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-25 23:12:14,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-25 23:12:14,276 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2020-10-25 23:12:14,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:14,276 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-25 23:12:14,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-25 23:12:14,277 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-25 23:12:14,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-25 23:12:14,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:14,278 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:14,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:14,494 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:14,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:14,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1022316052, now seen corresponding path program 15 times [2020-10-25 23:12:14,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:14,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109393927] [2020-10-25 23:12:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:14,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:14,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:14,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:14,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:14,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:14,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:14,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:14,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:14,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:14,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:14,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:14,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:15,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:15,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:15,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:15,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-25 23:12:15,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109393927] [2020-10-25 23:12:15,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274164438] [2020-10-25 23:12:15,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:15,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-25 23:12:15,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:15,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-25 23:12:15,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-25 23:12:15,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:15,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-10-25 23:12:15,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664920900] [2020-10-25 23:12:15,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-25 23:12:15,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:15,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-25 23:12:15,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-10-25 23:12:15,472 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 22 states. [2020-10-25 23:12:15,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:15,752 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-10-25 23:12:15,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-25 23:12:15,753 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 100 [2020-10-25 23:12:15,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:15,754 INFO L225 Difference]: With dead ends: 64 [2020-10-25 23:12:15,754 INFO L226 Difference]: Without dead ends: 60 [2020-10-25 23:12:15,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2020-10-25 23:12:15,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-25 23:12:15,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-25 23:12:15,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-25 23:12:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-25 23:12:15,766 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2020-10-25 23:12:15,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:15,768 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-25 23:12:15,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-25 23:12:15,768 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-25 23:12:15,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-25 23:12:15,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:15,770 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:15,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-25 23:12:15,983 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:15,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:15,985 INFO L82 PathProgramCache]: Analyzing trace with hash 35426954, now seen corresponding path program 16 times [2020-10-25 23:12:15,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:15,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868905695] [2020-10-25 23:12:15,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:16,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:16,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:16,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:16,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:16,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:16,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:16,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:16,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:16,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:16,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:16,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:16,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:16,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:16,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:16,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:16,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:16,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-25 23:12:16,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868905695] [2020-10-25 23:12:16,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273927917] [2020-10-25 23:12:16,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:16,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 23:12:16,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:16,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-25 23:12:16,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-25 23:12:16,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:16,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-10-25 23:12:16,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346875635] [2020-10-25 23:12:17,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-25 23:12:17,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:17,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-25 23:12:17,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-10-25 23:12:17,006 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 23 states. [2020-10-25 23:12:17,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:17,355 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-10-25 23:12:17,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-25 23:12:17,356 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-10-25 23:12:17,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:17,357 INFO L225 Difference]: With dead ends: 67 [2020-10-25 23:12:17,357 INFO L226 Difference]: Without dead ends: 63 [2020-10-25 23:12:17,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2020-10-25 23:12:17,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-25 23:12:17,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-25 23:12:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-25 23:12:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-25 23:12:17,365 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2020-10-25 23:12:17,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:17,366 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-25 23:12:17,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-25 23:12:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-25 23:12:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-25 23:12:17,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:17,368 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:17,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-25 23:12:17,584 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:17,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:17,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1604689196, now seen corresponding path program 17 times [2020-10-25 23:12:17,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:17,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500043052] [2020-10-25 23:12:17,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:17,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:17,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:17,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:17,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:17,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:17,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:17,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:17,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:17,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:18,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:18,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:18,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:18,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:18,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:18,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:18,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:18,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:18,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-25 23:12:18,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500043052] [2020-10-25 23:12:18,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349696815] [2020-10-25 23:12:18,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:18,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-10-25 23:12:18,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:18,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-25 23:12:18,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-25 23:12:18,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:18,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-10-25 23:12:18,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55096556] [2020-10-25 23:12:18,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-25 23:12:18,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:18,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-25 23:12:18,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-10-25 23:12:18,627 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 24 states. [2020-10-25 23:12:18,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:18,970 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-10-25 23:12:18,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-25 23:12:18,971 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-10-25 23:12:18,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:18,973 INFO L225 Difference]: With dead ends: 70 [2020-10-25 23:12:18,973 INFO L226 Difference]: Without dead ends: 66 [2020-10-25 23:12:18,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2020-10-25 23:12:18,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-25 23:12:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-25 23:12:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-25 23:12:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-10-25 23:12:18,981 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2020-10-25 23:12:18,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:18,982 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-10-25 23:12:18,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-25 23:12:18,982 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-10-25 23:12:18,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-25 23:12:18,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:18,983 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:19,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-25 23:12:19,197 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:19,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:19,197 INFO L82 PathProgramCache]: Analyzing trace with hash 427935434, now seen corresponding path program 18 times [2020-10-25 23:12:19,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:19,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176338217] [2020-10-25 23:12:19,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-25 23:12:20,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176338217] [2020-10-25 23:12:20,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765516178] [2020-10-25 23:12:20,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:20,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-10-25 23:12:20,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:20,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-25 23:12:20,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-25 23:12:21,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:21,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2020-10-25 23:12:21,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012458731] [2020-10-25 23:12:21,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-25 23:12:21,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:21,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-25 23:12:21,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3166, Unknown=0, NotChecked=0, Total=3782 [2020-10-25 23:12:21,643 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 62 states. [2020-10-25 23:12:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:23,298 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-10-25 23:12:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-25 23:12:23,299 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 118 [2020-10-25 23:12:23,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:23,301 INFO L225 Difference]: With dead ends: 73 [2020-10-25 23:12:23,301 INFO L226 Difference]: Without dead ends: 69 [2020-10-25 23:12:23,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1773, Invalid=7929, Unknown=0, NotChecked=0, Total=9702 [2020-10-25 23:12:23,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-25 23:12:23,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-25 23:12:23,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-25 23:12:23,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-25 23:12:23,309 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2020-10-25 23:12:23,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:23,310 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-25 23:12:23,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-25 23:12:23,310 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-25 23:12:23,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-25 23:12:23,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:23,311 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:23,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:23,527 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:23,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:23,527 INFO L82 PathProgramCache]: Analyzing trace with hash 653428628, now seen corresponding path program 19 times [2020-10-25 23:12:23,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:23,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532606248] [2020-10-25 23:12:23,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-25 23:12:24,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532606248] [2020-10-25 23:12:24,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131222478] [2020-10-25 23:12:24,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-25 23:12:24,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-25 23:12:24,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:24,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-10-25 23:12:24,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236702567] [2020-10-25 23:12:24,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-25 23:12:24,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:24,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-25 23:12:24,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-10-25 23:12:24,663 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 26 states. [2020-10-25 23:12:25,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:25,049 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-10-25 23:12:25,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-25 23:12:25,055 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 124 [2020-10-25 23:12:25,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:25,056 INFO L225 Difference]: With dead ends: 76 [2020-10-25 23:12:25,056 INFO L226 Difference]: Without dead ends: 72 [2020-10-25 23:12:25,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2020-10-25 23:12:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-25 23:12:25,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-25 23:12:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-25 23:12:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-25 23:12:25,062 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2020-10-25 23:12:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:25,063 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-25 23:12:25,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-25 23:12:25,063 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-25 23:12:25,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-25 23:12:25,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:25,064 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:25,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:25,276 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:25,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:25,277 INFO L82 PathProgramCache]: Analyzing trace with hash -693736694, now seen corresponding path program 20 times [2020-10-25 23:12:25,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:25,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853150318] [2020-10-25 23:12:25,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 23:12:25,307 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 23:12:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 23:12:25,350 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 23:12:25,385 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 23:12:25,385 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 23:12:25,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-25 23:12:25,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 11:12:25 BoogieIcfgContainer [2020-10-25 23:12:25,468 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 23:12:25,468 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 23:12:25,469 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 23:12:25,469 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 23:12:25,469 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:11:59" (3/4) ... [2020-10-25 23:12:25,471 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 23:12:25,538 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 23:12:25,539 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 23:12:25,540 INFO L168 Benchmark]: Toolchain (without parser) took 26445.39 ms. Allocated memory was 44.0 MB in the beginning and 308.3 MB in the end (delta: 264.2 MB). Free memory was 21.4 MB in the beginning and 160.3 MB in the end (delta: -138.9 MB). Peak memory consumption was 126.4 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:25,541 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 44.0 MB. Free memory is still 21.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 23:12:25,541 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.93 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 20.8 MB in the beginning and 31.2 MB in the end (delta: -10.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:25,541 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.22 ms. Allocated memory is still 54.5 MB. Free memory was 31.2 MB in the beginning and 29.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 23:12:25,542 INFO L168 Benchmark]: Boogie Preprocessor took 18.21 ms. Allocated memory is still 54.5 MB. Free memory was 29.9 MB in the beginning and 29.0 MB in the end (delta: 941.6 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:25,542 INFO L168 Benchmark]: RCFGBuilder took 495.20 ms. Allocated memory is still 54.5 MB. Free memory was 29.0 MB in the beginning and 32.2 MB in the end (delta: -3.2 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:25,543 INFO L168 Benchmark]: TraceAbstraction took 25491.94 ms. Allocated memory was 54.5 MB in the beginning and 308.3 MB in the end (delta: 253.8 MB). Free memory was 31.8 MB in the beginning and 166.6 MB in the end (delta: -134.8 MB). Peak memory consumption was 117.7 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:25,543 INFO L168 Benchmark]: Witness Printer took 70.15 ms. Allocated memory is still 308.3 MB. Free memory was 166.6 MB in the beginning and 160.3 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:25,545 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 44.0 MB. Free memory is still 21.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 310.93 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 20.8 MB in the beginning and 31.2 MB in the end (delta: -10.5 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.22 ms. Allocated memory is still 54.5 MB. Free memory was 31.2 MB in the beginning and 29.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.21 ms. Allocated memory is still 54.5 MB. Free memory was 29.9 MB in the beginning and 29.0 MB in the end (delta: 941.6 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 495.20 ms. Allocated memory is still 54.5 MB. Free memory was 29.0 MB in the beginning and 32.2 MB in the end (delta: -3.2 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 25491.94 ms. Allocated memory was 54.5 MB in the beginning and 308.3 MB in the end (delta: 253.8 MB). Free memory was 31.8 MB in the beginning and 166.6 MB in the end (delta: -134.8 MB). Peak memory consumption was 117.7 MB. Max. memory is 16.1 GB. * Witness Printer took 70.15 ms. Allocated memory is still 308.3 MB. Free memory was 166.6 MB in the beginning and 160.3 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = 20; [L13] CALL, EXPR id(input) VAL [\old(x)=20] [L7] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L8] CALL, EXPR id(x-1) VAL [\old(x)=19] [L7] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L8] CALL, EXPR id(x-1) VAL [\old(x)=18] [L7] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L8] CALL, EXPR id(x-1) VAL [\old(x)=17] [L7] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L8] CALL, EXPR id(x-1) VAL [\old(x)=16] [L7] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L8] CALL, EXPR id(x-1) VAL [\old(x)=15] [L7] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L8] CALL, EXPR id(x-1) VAL [\old(x)=14] [L7] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L8] CALL, EXPR id(x-1) VAL [\old(x)=13] [L7] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L8] CALL, EXPR id(x-1) VAL [\old(x)=12] [L7] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L8] CALL, EXPR id(x-1) VAL [\old(x)=11] [L7] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L8] CALL, EXPR id(x-1) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 20 [L4] __assert_fail("0", "id_i20_o20-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 25.3s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 6.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 201 SDtfs, 722 SDslu, 1281 SDs, 0 SdLazy, 1092 SolverSat, 218 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2247 GetRequests, 1638 SyntacticMatches, 0 SemanticMatches, 609 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5236 ImplicationChecksByTransitivity, 10.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 12.4s InterpolantComputationTime, 2800 NumberOfCodeBlocks, 2800 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2631 ConstructedInterpolants, 0 QuantifiedInterpolants, 561591 SizeOfPredicates, 188 NumberOfNonLiveVariables, 3667 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...