./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/sum_15x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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/sum_15x0-1.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 d450838eb5360c0781a4b04de09325400364ec08 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 01:48:32,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:48:32,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:48:32,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:48:32,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:48:32,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:48:32,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:48:32,366 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:48:32,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:48:32,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:48:32,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:48:32,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:48:32,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:48:32,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:48:32,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:48:32,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:48:32,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:48:32,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:48:32,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:48:32,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:48:32,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:48:32,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:48:32,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:48:32,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:48:32,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:48:32,388 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:48:32,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:48:32,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:48:32,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:48:32,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:48:32,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:48:32,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:48:32,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:48:32,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:48:32,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:48:32,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:48:32,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:48:32,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:48:32,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:48:32,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:48:32,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:48:32,399 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:48:32,442 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:48:32,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:48:32,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:48:32,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:48:32,449 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:48:32,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:48:32,450 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:48:32,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:48:32,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:48:32,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:48:32,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:48:32,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:48:32,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:48:32,452 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:48:32,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:48:32,452 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:48:32,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:48:32,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:48:32,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:48:32,455 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:48:32,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:48:32,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:48:32,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:48:32,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:48:32,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:48:32,457 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:48:32,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:48:32,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:48:32,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:48:32,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> d450838eb5360c0781a4b04de09325400364ec08 [2020-10-20 01:48:32,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:48:32,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:48:32,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:48:32,706 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:48:32,707 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:48:32,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2020-10-20 01:48:32,789 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac5a95c02/232f663f6fe74f188f32b304d83052c5/FLAG0422f5fba [2020-10-20 01:48:33,345 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:48:33,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2020-10-20 01:48:33,351 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac5a95c02/232f663f6fe74f188f32b304d83052c5/FLAG0422f5fba [2020-10-20 01:48:33,602 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac5a95c02/232f663f6fe74f188f32b304d83052c5 [2020-10-20 01:48:33,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:48:33,613 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:48:33,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:48:33,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:48:33,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:48:33,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:48:33" (1/1) ... [2020-10-20 01:48:33,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@167ad720 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:33, skipping insertion in model container [2020-10-20 01:48:33,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:48:33" (1/1) ... [2020-10-20 01:48:33,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:48:33,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:48:33,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:48:33,864 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:48:33,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:48:33,894 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:48:33,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:33 WrapperNode [2020-10-20 01:48:33,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:48:33,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:48:33,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:48:33,897 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:48:33,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:33" (1/1) ... [2020-10-20 01:48:33,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:33" (1/1) ... [2020-10-20 01:48:33,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:48:33,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:48:33,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:48:33,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:48:33,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:33" (1/1) ... [2020-10-20 01:48:33,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:33" (1/1) ... [2020-10-20 01:48:33,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:33" (1/1) ... [2020-10-20 01:48:33,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:33" (1/1) ... [2020-10-20 01:48:33,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:33" (1/1) ... [2020-10-20 01:48:33,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:33" (1/1) ... [2020-10-20 01:48:33,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:33" (1/1) ... [2020-10-20 01:48:33,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:48:33,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:48:33,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:48:33,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:48:33,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:33" (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 [2020-10-20 01:48:34,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:48:34,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:48:34,027 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-10-20 01:48:34,027 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-10-20 01:48:34,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:48:34,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:48:34,215 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:48:34,215 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 01:48:34,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:48:34 BoogieIcfgContainer [2020-10-20 01:48:34,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:48:34,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:48:34,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:48:34,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:48:34,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:48:33" (1/3) ... [2020-10-20 01:48:34,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@256c787b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:48:34, skipping insertion in model container [2020-10-20 01:48:34,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:33" (2/3) ... [2020-10-20 01:48:34,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@256c787b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:48:34, skipping insertion in model container [2020-10-20 01:48:34,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:48:34" (3/3) ... [2020-10-20 01:48:34,225 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2020-10-20 01:48:34,237 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:48:34,244 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 01:48:34,258 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 01:48:34,306 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:48:34,306 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:48:34,307 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:48:34,307 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:48:34,307 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:48:34,308 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:48:34,308 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:48:34,308 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:48:34,332 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-20 01:48:34,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 01:48:34,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:34,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:34,341 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:34,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:34,349 INFO L82 PathProgramCache]: Analyzing trace with hash 666808458, now seen corresponding path program 1 times [2020-10-20 01:48:34,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:34,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956257381] [2020-10-20 01:48:34,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:34,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:48:34,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956257381] [2020-10-20 01:48:34,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:48:34,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 01:48:34,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447597173] [2020-10-20 01:48:34,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:48:34,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:34,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:48:34,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:48:34,652 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-10-20 01:48:34,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:34,741 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-10-20 01:48:34,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:48:34,743 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-20 01:48:34,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:34,754 INFO L225 Difference]: With dead ends: 26 [2020-10-20 01:48:34,755 INFO L226 Difference]: Without dead ends: 15 [2020-10-20 01:48:34,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:48:34,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-20 01:48:34,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-20 01:48:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-20 01:48:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-20 01:48:34,804 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-10-20 01:48:34,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:34,804 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-20 01:48:34,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:48:34,805 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-20 01:48:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 01:48:34,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:34,807 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:34,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:48:34,807 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:34,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:34,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1352629460, now seen corresponding path program 1 times [2020-10-20 01:48:34,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:34,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051553365] [2020-10-20 01:48:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:34,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:34,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 01:48:34,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051553365] [2020-10-20 01:48:34,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250714732] [2020-10-20 01:48:34,947 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 [2020-10-20 01:48:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:35,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:48:35,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 01:48:35,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:35,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 01:48:35,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901397578] [2020-10-20 01:48:35,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:48:35,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:35,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:48:35,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:48:35,100 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-10-20 01:48:35,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:35,162 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-10-20 01:48:35,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 01:48:35,163 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-20 01:48:35,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:35,164 INFO L225 Difference]: With dead ends: 22 [2020-10-20 01:48:35,164 INFO L226 Difference]: Without dead ends: 18 [2020-10-20 01:48:35,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:48:35,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-20 01:48:35,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-20 01:48:35,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-20 01:48:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-20 01:48:35,172 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-10-20 01:48:35,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:35,173 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-20 01:48:35,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:48:35,173 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-20 01:48:35,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 01:48:35,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:35,175 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:35,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-20 01:48:35,391 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:35,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:35,392 INFO L82 PathProgramCache]: Analyzing trace with hash 832070858, now seen corresponding path program 2 times [2020-10-20 01:48:35,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:35,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414324198] [2020-10-20 01:48:35,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:35,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:35,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:35,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 01:48:35,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414324198] [2020-10-20 01:48:35,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371944095] [2020-10-20 01:48:35,624 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 [2020-10-20 01:48:35,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:48:35,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:35,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 01:48:35,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 01:48:35,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:35,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 01:48:35,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285855650] [2020-10-20 01:48:35,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 01:48:35,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:35,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 01:48:35,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:48:35,725 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-10-20 01:48:35,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:35,796 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-10-20 01:48:35,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:48:35,797 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-20 01:48:35,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:35,798 INFO L225 Difference]: With dead ends: 25 [2020-10-20 01:48:35,798 INFO L226 Difference]: Without dead ends: 21 [2020-10-20 01:48:35,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-20 01:48:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-20 01:48:35,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-20 01:48:35,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-20 01:48:35,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-20 01:48:35,813 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-10-20 01:48:35,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:35,814 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-20 01:48:35,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 01:48:35,814 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-20 01:48:35,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 01:48:35,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:35,816 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:36,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:36,031 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:36,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:36,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1547641236, now seen corresponding path program 3 times [2020-10-20 01:48:36,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:36,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421607383] [2020-10-20 01:48:36,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:36,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:36,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:36,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:36,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-20 01:48:36,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421607383] [2020-10-20 01:48:36,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116397505] [2020-10-20 01:48:36,196 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 [2020-10-20 01:48:36,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-20 01:48:36,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:36,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 01:48:36,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-20 01:48:36,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:36,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 01:48:36,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613611159] [2020-10-20 01:48:36,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 01:48:36,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:36,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 01:48:36,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:48:36,324 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-10-20 01:48:36,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:36,398 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-20 01:48:36,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 01:48:36,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-20 01:48:36,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:36,400 INFO L225 Difference]: With dead ends: 28 [2020-10-20 01:48:36,401 INFO L226 Difference]: Without dead ends: 24 [2020-10-20 01:48:36,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-20 01:48:36,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-20 01:48:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-20 01:48:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 01:48:36,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-20 01:48:36,407 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-10-20 01:48:36,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:36,408 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-20 01:48:36,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 01:48:36,408 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-20 01:48:36,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-20 01:48:36,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:36,410 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:36,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:36,624 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:36,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:36,625 INFO L82 PathProgramCache]: Analyzing trace with hash -346978038, now seen corresponding path program 4 times [2020-10-20 01:48:36,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:36,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967688575] [2020-10-20 01:48:36,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:36,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:36,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:36,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:36,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:36,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-20 01:48:36,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967688575] [2020-10-20 01:48:36,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678591697] [2020-10-20 01:48:36,808 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 [2020-10-20 01:48:36,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 01:48:36,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:36,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 01:48:36,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-20 01:48:36,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:36,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 01:48:36,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206464921] [2020-10-20 01:48:36,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 01:48:36,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:36,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 01:48:36,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:48:36,944 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-10-20 01:48:37,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:37,036 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-20 01:48:37,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 01:48:37,037 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-20 01:48:37,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:37,038 INFO L225 Difference]: With dead ends: 31 [2020-10-20 01:48:37,038 INFO L226 Difference]: Without dead ends: 27 [2020-10-20 01:48:37,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-20 01:48:37,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-20 01:48:37,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-20 01:48:37,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 01:48:37,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-20 01:48:37,045 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-10-20 01:48:37,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:37,046 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-20 01:48:37,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 01:48:37,047 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-20 01:48:37,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-20 01:48:37,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:37,048 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:37,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:37,262 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:37,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:37,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1234184620, now seen corresponding path program 5 times [2020-10-20 01:48:37,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:37,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660400108] [2020-10-20 01:48:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:37,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:37,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:37,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:37,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:37,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:37,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-20 01:48:37,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660400108] [2020-10-20 01:48:37,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5445445] [2020-10-20 01:48:37,494 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 [2020-10-20 01:48:37,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-20 01:48:37,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:37,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 01:48:37,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-20 01:48:37,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:37,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-20 01:48:37,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570916456] [2020-10-20 01:48:37,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 01:48:37,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:37,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 01:48:37,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-20 01:48:37,609 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-10-20 01:48:37,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:37,706 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-20 01:48:37,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 01:48:37,707 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-20 01:48:37,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:37,708 INFO L225 Difference]: With dead ends: 34 [2020-10-20 01:48:37,708 INFO L226 Difference]: Without dead ends: 30 [2020-10-20 01:48:37,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-20 01:48:37,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-20 01:48:37,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-20 01:48:37,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 01:48:37,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-20 01:48:37,716 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-10-20 01:48:37,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:37,717 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-20 01:48:37,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 01:48:37,717 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-20 01:48:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-20 01:48:37,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:37,719 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:37,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-20 01:48:37,933 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:37,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:37,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1831214410, now seen corresponding path program 6 times [2020-10-20 01:48:37,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:37,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880391326] [2020-10-20 01:48:37,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:37,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:38,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:38,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:38,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:38,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:38,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:38,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-20 01:48:38,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880391326] [2020-10-20 01:48:38,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315259425] [2020-10-20 01:48:38,129 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 [2020-10-20 01:48:38,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-20 01:48:38,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:38,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 01:48:38,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-20 01:48:38,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:38,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-20 01:48:38,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394445517] [2020-10-20 01:48:38,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 01:48:38,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:38,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 01:48:38,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-20 01:48:38,292 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-10-20 01:48:38,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:38,413 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-20 01:48:38,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 01:48:38,414 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-20 01:48:38,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:38,415 INFO L225 Difference]: With dead ends: 37 [2020-10-20 01:48:38,416 INFO L226 Difference]: Without dead ends: 33 [2020-10-20 01:48:38,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-10-20 01:48:38,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-20 01:48:38,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-20 01:48:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-20 01:48:38,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-20 01:48:38,422 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-10-20 01:48:38,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:38,423 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-20 01:48:38,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 01:48:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-20 01:48:38,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-20 01:48:38,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:38,425 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:38,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:38,638 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:38,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:38,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1739954964, now seen corresponding path program 7 times [2020-10-20 01:48:38,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:38,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657597941] [2020-10-20 01:48:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:38,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:38,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:38,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:38,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:38,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:38,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:38,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:38,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-20 01:48:38,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657597941] [2020-10-20 01:48:38,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674544749] [2020-10-20 01:48:38,902 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 [2020-10-20 01:48:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:38,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 01:48:38,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-20 01:48:39,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:39,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-20 01:48:39,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422580478] [2020-10-20 01:48:39,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 01:48:39,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:39,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 01:48:39,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-20 01:48:39,008 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-10-20 01:48:39,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:39,127 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-20 01:48:39,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 01:48:39,128 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-20 01:48:39,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:39,129 INFO L225 Difference]: With dead ends: 40 [2020-10-20 01:48:39,129 INFO L226 Difference]: Without dead ends: 36 [2020-10-20 01:48:39,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-10-20 01:48:39,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-20 01:48:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-20 01:48:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-20 01:48:39,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-20 01:48:39,136 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-10-20 01:48:39,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:39,136 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-20 01:48:39,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 01:48:39,137 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-20 01:48:39,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-20 01:48:39,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:39,138 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:39,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:39,352 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:39,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:39,353 INFO L82 PathProgramCache]: Analyzing trace with hash -632151670, now seen corresponding path program 8 times [2020-10-20 01:48:39,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:39,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569756779] [2020-10-20 01:48:39,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:39,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:39,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:39,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:39,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:39,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:39,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:39,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:39,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:39,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-20 01:48:39,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569756779] [2020-10-20 01:48:39,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302624333] [2020-10-20 01:48:39,662 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 [2020-10-20 01:48:39,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:48:39,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:39,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 01:48:39,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-20 01:48:39,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:39,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-20 01:48:39,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891530087] [2020-10-20 01:48:39,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 01:48:39,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:39,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 01:48:39,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-10-20 01:48:39,805 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-10-20 01:48:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:39,951 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-10-20 01:48:39,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 01:48:39,957 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-10-20 01:48:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:39,958 INFO L225 Difference]: With dead ends: 43 [2020-10-20 01:48:39,959 INFO L226 Difference]: Without dead ends: 39 [2020-10-20 01:48:39,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-10-20 01:48:39,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-20 01:48:39,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-20 01:48:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-20 01:48:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-20 01:48:39,966 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-10-20 01:48:39,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:39,966 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-20 01:48:39,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 01:48:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-20 01:48:39,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-20 01:48:39,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:39,968 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:40,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-20 01:48:40,181 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:40,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:40,181 INFO L82 PathProgramCache]: Analyzing trace with hash 764702676, now seen corresponding path program 9 times [2020-10-20 01:48:40,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:40,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071411788] [2020-10-20 01:48:40,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-20 01:48:40,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071411788] [2020-10-20 01:48:40,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012342931] [2020-10-20 01:48:40,490 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 [2020-10-20 01:48:40,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-20 01:48:40,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:40,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 01:48:40,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-20 01:48:40,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:40,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-20 01:48:40,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817652507] [2020-10-20 01:48:40,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-20 01:48:40,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:40,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 01:48:40,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-20 01:48:40,625 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-10-20 01:48:40,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:40,763 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-20 01:48:40,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-20 01:48:40,763 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-10-20 01:48:40,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:40,765 INFO L225 Difference]: With dead ends: 46 [2020-10-20 01:48:40,765 INFO L226 Difference]: Without dead ends: 42 [2020-10-20 01:48:40,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-10-20 01:48:40,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-20 01:48:40,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-20 01:48:40,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-20 01:48:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-20 01:48:40,772 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-10-20 01:48:40,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:40,773 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-20 01:48:40,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-20 01:48:40,773 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-20 01:48:40,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-20 01:48:40,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:40,775 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:40,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:40,988 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:40,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:40,989 INFO L82 PathProgramCache]: Analyzing trace with hash 554800586, now seen corresponding path program 10 times [2020-10-20 01:48:40,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:40,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342047212] [2020-10-20 01:48:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-20 01:48:41,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342047212] [2020-10-20 01:48:41,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475493364] [2020-10-20 01:48:41,313 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 [2020-10-20 01:48:41,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 01:48:41,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:41,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-20 01:48:41,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-20 01:48:41,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:41,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-20 01:48:41,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803568938] [2020-10-20 01:48:41,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 01:48:41,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:41,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 01:48:41,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-10-20 01:48:41,432 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-10-20 01:48:41,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:41,575 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-20 01:48:41,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 01:48:41,575 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-10-20 01:48:41,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:41,577 INFO L225 Difference]: With dead ends: 49 [2020-10-20 01:48:41,577 INFO L226 Difference]: Without dead ends: 45 [2020-10-20 01:48:41,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-10-20 01:48:41,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-20 01:48:41,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-20 01:48:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-20 01:48:41,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-20 01:48:41,584 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-10-20 01:48:41,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:41,584 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-20 01:48:41,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 01:48:41,584 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-20 01:48:41,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-20 01:48:41,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:41,586 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:41,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:41,799 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:41,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:41,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1164946284, now seen corresponding path program 11 times [2020-10-20 01:48:41,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:41,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589149021] [2020-10-20 01:48:41,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:41,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-20 01:48:42,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589149021] [2020-10-20 01:48:42,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821480507] [2020-10-20 01:48:42,172 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 [2020-10-20 01:48:42,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-20 01:48:42,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:42,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-20 01:48:42,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-20 01:48:42,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:42,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-20 01:48:42,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642742560] [2020-10-20 01:48:42,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-20 01:48:42,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:42,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-20 01:48:42,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-10-20 01:48:42,307 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-10-20 01:48:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:42,474 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-10-20 01:48:42,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 01:48:42,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-10-20 01:48:42,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:42,475 INFO L225 Difference]: With dead ends: 52 [2020-10-20 01:48:42,475 INFO L226 Difference]: Without dead ends: 48 [2020-10-20 01:48:42,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-10-20 01:48:42,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-20 01:48:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-20 01:48:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-20 01:48:42,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-20 01:48:42,483 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2020-10-20 01:48:42,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:42,484 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-20 01:48:42,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-20 01:48:42,484 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-20 01:48:42,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-20 01:48:42,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:42,485 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:42,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-20 01:48:42,692 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:42,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:42,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1163888118, now seen corresponding path program 12 times [2020-10-20 01:48:42,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:42,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199596850] [2020-10-20 01:48:42,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:42,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-20 01:48:43,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199596850] [2020-10-20 01:48:43,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220696459] [2020-10-20 01:48:43,074 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 [2020-10-20 01:48:43,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-20 01:48:43,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:43,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-20 01:48:43,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-20 01:48:43,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:43,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-20 01:48:43,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849131171] [2020-10-20 01:48:43,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-20 01:48:43,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:43,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 01:48:43,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-10-20 01:48:43,194 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-10-20 01:48:43,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:43,380 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-10-20 01:48:43,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 01:48:43,381 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-10-20 01:48:43,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:43,382 INFO L225 Difference]: With dead ends: 55 [2020-10-20 01:48:43,382 INFO L226 Difference]: Without dead ends: 51 [2020-10-20 01:48:43,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-10-20 01:48:43,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-20 01:48:43,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-20 01:48:43,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-20 01:48:43,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-20 01:48:43,389 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2020-10-20 01:48:43,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:43,390 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-20 01:48:43,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-20 01:48:43,390 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-20 01:48:43,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-20 01:48:43,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:43,392 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:43,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-20 01:48:43,606 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:43,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:43,606 INFO L82 PathProgramCache]: Analyzing trace with hash -164804268, now seen corresponding path program 13 times [2020-10-20 01:48:43,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:43,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805147607] [2020-10-20 01:48:43,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:43,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-20 01:48:44,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805147607] [2020-10-20 01:48:44,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769511265] [2020-10-20 01:48:44,032 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 [2020-10-20 01:48:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-20 01:48:44,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-20 01:48:44,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:44,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-20 01:48:44,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130038158] [2020-10-20 01:48:44,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-20 01:48:44,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:44,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-20 01:48:44,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-10-20 01:48:44,174 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-10-20 01:48:44,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:44,360 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-10-20 01:48:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-20 01:48:44,361 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 88 [2020-10-20 01:48:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:44,362 INFO L225 Difference]: With dead ends: 58 [2020-10-20 01:48:44,362 INFO L226 Difference]: Without dead ends: 54 [2020-10-20 01:48:44,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-10-20 01:48:44,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-20 01:48:44,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-20 01:48:44,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-20 01:48:44,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-20 01:48:44,378 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2020-10-20 01:48:44,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:44,379 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-20 01:48:44,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-20 01:48:44,380 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-20 01:48:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-20 01:48:44,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:44,382 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:44,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-20 01:48:44,583 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:44,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:44,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1799016010, now seen corresponding path program 14 times [2020-10-20 01:48:44,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:44,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712776979] [2020-10-20 01:48:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:44,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-20 01:48:45,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712776979] [2020-10-20 01:48:45,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499813316] [2020-10-20 01:48:45,173 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 [2020-10-20 01:48:45,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:48:45,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:45,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-20 01:48:45,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-20 01:48:45,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:45,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-20 01:48:45,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752886624] [2020-10-20 01:48:45,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-20 01:48:45,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:45,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-20 01:48:45,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-10-20 01:48:45,355 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-10-20 01:48:45,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:45,643 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-20 01:48:45,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-20 01:48:45,644 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-10-20 01:48:45,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:45,646 INFO L225 Difference]: With dead ends: 61 [2020-10-20 01:48:45,646 INFO L226 Difference]: Without dead ends: 57 [2020-10-20 01:48:45,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-10-20 01:48:45,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-20 01:48:45,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-20 01:48:45,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-20 01:48:45,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-20 01:48:45,666 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2020-10-20 01:48:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:45,668 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-20 01:48:45,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-20 01:48:45,669 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-20 01:48:45,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-20 01:48:45,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:45,671 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:45,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:45,884 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:45,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:45,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1022316052, now seen corresponding path program 15 times [2020-10-20 01:48:45,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:45,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602920660] [2020-10-20 01:48:45,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:45,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:46,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:47,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-10-20 01:48:47,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602920660] [2020-10-20 01:48:47,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685950998] [2020-10-20 01:48:47,272 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 [2020-10-20 01:48:47,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-20 01:48:47,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:47,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 137 conjunts are in the unsatisfiable core [2020-10-20 01:48:47,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 29 proven. 345 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2020-10-20 01:48:49,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:49,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39] total 74 [2020-10-20 01:48:49,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936100386] [2020-10-20 01:48:49,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-20 01:48:49,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:49,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-20 01:48:49,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=5037, Unknown=0, NotChecked=0, Total=5402 [2020-10-20 01:48:49,406 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 74 states. [2020-10-20 01:48:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:52,999 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-20 01:48:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-20 01:48:52,999 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 100 [2020-10-20 01:48:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:53,000 INFO L225 Difference]: With dead ends: 60 [2020-10-20 01:48:53,000 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 01:48:53,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2163 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=915, Invalid=11075, Unknown=0, NotChecked=0, Total=11990 [2020-10-20 01:48:53,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 01:48:53,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 01:48:53,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 01:48:53,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 01:48:53,006 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2020-10-20 01:48:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:53,006 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 01:48:53,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-20 01:48:53,006 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 01:48:53,006 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 01:48:53,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-20 01:48:53,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 01:48:53,239 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 01:48:53,239 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 01:48:53,239 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 01:48:53,239 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 01:48:53,239 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-20 01:48:53,240 INFO L274 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-10-20 01:48:53,240 INFO L274 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-10-20 01:48:53,240 INFO L270 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (= ULTIMATE.start_main_~a~0 15) (= ULTIMATE.start_main_~b~0 0)) [2020-10-20 01:48:53,241 INFO L274 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-10-20 01:48:53,241 INFO L274 CegarLoopResult]: For program point L13(lines 13 20) no Hoare annotation was computed. [2020-10-20 01:48:53,241 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-20 01:48:53,241 INFO L274 CegarLoopResult]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2020-10-20 01:48:53,241 INFO L270 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (<= 1 sum_~n) (= sum_~m |sum_#in~m|)) [2020-10-20 01:48:53,241 INFO L274 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-10-20 01:48:53,241 INFO L274 CegarLoopResult]: For program point L6(lines 6 10) no Hoare annotation was computed. [2020-10-20 01:48:53,241 INFO L274 CegarLoopResult]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2020-10-20 01:48:53,241 INFO L277 CegarLoopResult]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2020-10-20 01:48:53,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:48:53 BoogieIcfgContainer [2020-10-20 01:48:53,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:48:53,249 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:48:53,249 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:48:53,250 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:48:53,250 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:48:34" (3/4) ... [2020-10-20 01:48:53,254 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 01:48:53,264 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2020-10-20 01:48:53,273 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-10-20 01:48:53,274 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-10-20 01:48:53,275 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:48:53,275 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:48:53,345 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:48:53,345 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:48:53,348 INFO L168 Benchmark]: Toolchain (without parser) took 19739.85 ms. Allocated memory was 43.0 MB in the beginning and 138.9 MB in the end (delta: 95.9 MB). Free memory was 25.0 MB in the beginning and 18.3 MB in the end (delta: 6.7 MB). Peak memory consumption was 102.7 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:53,353 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 32.5 MB. Free memory was 11.2 MB in the beginning and 11.1 MB in the end (delta: 49.5 kB). Peak memory consumption was 49.5 kB. Max. memory is 14.3 GB. [2020-10-20 01:48:53,354 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.09 ms. Allocated memory is still 43.0 MB. Free memory was 24.2 MB in the beginning and 14.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:53,357 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.67 ms. Allocated memory was 43.0 MB in the beginning and 43.5 MB in the end (delta: 524.3 kB). Free memory was 14.0 MB in the beginning and 26.9 MB in the end (delta: -12.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:53,357 INFO L168 Benchmark]: Boogie Preprocessor took 21.49 ms. Allocated memory is still 43.5 MB. Free memory was 26.9 MB in the beginning and 25.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:53,358 INFO L168 Benchmark]: RCFGBuilder took 251.93 ms. Allocated memory is still 43.5 MB. Free memory was 25.8 MB in the beginning and 13.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:53,358 INFO L168 Benchmark]: TraceAbstraction took 19030.72 ms. Allocated memory was 43.5 MB in the beginning and 138.9 MB in the end (delta: 95.4 MB). Free memory was 13.4 MB in the beginning and 20.6 MB in the end (delta: -7.2 MB). Peak memory consumption was 88.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:53,358 INFO L168 Benchmark]: Witness Printer took 96.35 ms. Allocated memory is still 138.9 MB. Free memory was 20.6 MB in the beginning and 18.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:53,363 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 32.5 MB. Free memory was 11.2 MB in the beginning and 11.1 MB in the end (delta: 49.5 kB). Peak memory consumption was 49.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 282.09 ms. Allocated memory is still 43.0 MB. Free memory was 24.2 MB in the beginning and 14.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 46.67 ms. Allocated memory was 43.0 MB in the beginning and 43.5 MB in the end (delta: 524.3 kB). Free memory was 14.0 MB in the beginning and 26.9 MB in the end (delta: -12.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 21.49 ms. Allocated memory is still 43.5 MB. Free memory was 26.9 MB in the beginning and 25.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 251.93 ms. Allocated memory is still 43.5 MB. Free memory was 25.8 MB in the beginning and 13.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 14.3 GB. * TraceAbstraction took 19030.72 ms. Allocated memory was 43.5 MB in the beginning and 138.9 MB in the end (delta: 95.4 MB). Free memory was 13.4 MB in the beginning and 20.6 MB in the end (delta: -7.2 MB). Peak memory consumption was 88.2 MB. Max. memory is 14.3 GB. * Witness Printer took 96.35 ms. Allocated memory is still 138.9 MB. Free memory was 20.6 MB in the beginning and 18.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.9s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 158 SDtfs, 520 SDslu, 1322 SDs, 0 SdLazy, 2208 SolverSat, 163 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1485 GetRequests, 1093 SyntacticMatches, 0 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3283 ImplicationChecksByTransitivity, 7.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=15, 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, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.3s InterpolantComputationTime, 1750 NumberOfCodeBlocks, 1750 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 1719 ConstructedInterpolants, 0 QuantifiedInterpolants, 393636 SizeOfPredicates, 154 NumberOfNonLiveVariables, 3015 ConjunctsInSsa, 403 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 4155/7680 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 correct! Received shutdown request...