/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:40:43,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:40:43,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:40:43,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:40:43,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:40:43,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:40:43,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:40:43,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:40:43,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:40:43,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:40:43,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:40:43,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:40:43,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:40:43,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:40:43,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:40:43,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:40:43,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:40:43,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:40:43,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:40:43,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:40:43,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:40:43,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:40:43,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:40:43,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:40:43,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:40:43,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:40:43,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:40:43,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:40:43,435 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 10:40:43,463 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:40:43,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:40:43,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:40:43,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:40:43,465 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:40:43,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:40:43,465 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:40:43,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:40:43,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:40:43,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:40:43,466 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:40:43,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:40:43,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:40:43,468 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:40:43,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:40:43,468 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:40:43,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:40:43,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:40:43,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:40:43,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:40:43,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:40:43,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:40:43,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:40:43,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:40:43,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:40:43,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:40:43,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:43,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:40:43,475 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:40:43,475 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 10:40:43,808 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:40:43,822 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:40:43,826 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:40:43,827 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:40:43,828 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:40:43,828 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-07-21 10:40:43,893 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d2ecda43/509ad813716240ef8e933f9c7ce4aee2/FLAG26ffd7840 [2020-07-21 10:40:44,336 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:40:44,337 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-07-21 10:40:44,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d2ecda43/509ad813716240ef8e933f9c7ce4aee2/FLAG26ffd7840 [2020-07-21 10:40:44,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d2ecda43/509ad813716240ef8e933f9c7ce4aee2 [2020-07-21 10:40:44,716 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:40:44,719 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:40:44,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:44,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:40:44,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:40:44,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:44" (1/1) ... [2020-07-21 10:40:44,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bc9b275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:44, skipping insertion in model container [2020-07-21 10:40:44,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:44" (1/1) ... [2020-07-21 10:40:44,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:40:44,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:40:44,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:44,920 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:40:44,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:44,956 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:40:44,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:44 WrapperNode [2020-07-21 10:40:44,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:44,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:40:44,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:40:44,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:40:44,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:44" (1/1) ... [2020-07-21 10:40:44,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:44" (1/1) ... [2020-07-21 10:40:44,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:44" (1/1) ... [2020-07-21 10:40:44,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:44" (1/1) ... [2020-07-21 10:40:44,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:44" (1/1) ... [2020-07-21 10:40:44,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:44" (1/1) ... [2020-07-21 10:40:44,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:44" (1/1) ... [2020-07-21 10:40:44,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:40:44,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:40:44,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:40:44,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:40:44,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:44" (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 [2020-07-21 10:40:45,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:40:45,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:40:45,160 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-21 10:40:45,160 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:40:45,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:40:45,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:40:45,161 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-21 10:40:45,161 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:40:45,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:40:45,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:40:45,365 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:40:45,365 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:40:45,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:45 BoogieIcfgContainer [2020-07-21 10:40:45,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:40:45,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:40:45,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:40:45,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:40:45,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:40:44" (1/3) ... [2020-07-21 10:40:45,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190e0633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:45, skipping insertion in model container [2020-07-21 10:40:45,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:44" (2/3) ... [2020-07-21 10:40:45,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190e0633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:45, skipping insertion in model container [2020-07-21 10:40:45,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:45" (3/3) ... [2020-07-21 10:40:45,379 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-07-21 10:40:45,389 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:40:45,395 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:40:45,408 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:40:45,431 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:40:45,431 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:40:45,431 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:40:45,431 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:40:45,431 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:40:45,432 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:40:45,432 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:40:45,432 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:40:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 10:40:45,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 10:40:45,458 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:45,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:45,460 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:45,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:45,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-07-21 10:40:45,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:45,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547233552] [2020-07-21 10:40:45,477 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:45,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 10:40:45,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:40:45,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:45,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547233552] [2020-07-21 10:40:45,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:45,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 10:40:45,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689814428] [2020-07-21 10:40:45,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 10:40:45,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:45,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 10:40:45,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:40:45,697 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-07-21 10:40:45,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:45,952 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-07-21 10:40:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:40:45,955 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-21 10:40:45,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:45,974 INFO L225 Difference]: With dead ends: 36 [2020-07-21 10:40:45,974 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 10:40:45,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 10:40:46,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 10:40:46,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 10:40:46,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 10:40:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-21 10:40:46,033 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-07-21 10:40:46,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:46,033 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-21 10:40:46,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 10:40:46,034 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-21 10:40:46,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 10:40:46,036 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:46,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:46,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:46,250 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:46,251 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times [2020-07-21 10:40:46,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:46,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340783280] [2020-07-21 10:40:46,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:46,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 10:40:46,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:40:46,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:46,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340783280] [2020-07-21 10:40:46,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:46,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 10:40:46,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619522937] [2020-07-21 10:40:46,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 10:40:46,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:46,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 10:40:46,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:40:46,389 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states. [2020-07-21 10:40:46,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:46,488 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-07-21 10:40:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:40:46,489 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-21 10:40:46,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:46,491 INFO L225 Difference]: With dead ends: 28 [2020-07-21 10:40:46,491 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 10:40:46,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 10:40:46,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 10:40:46,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-07-21 10:40:46,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 10:40:46,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-21 10:40:46,500 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-07-21 10:40:46,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:46,500 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-21 10:40:46,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 10:40:46,501 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-21 10:40:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 10:40:46,502 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:46,502 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:46,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:46,717 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:46,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:46,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-07-21 10:40:46,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:46,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020361637] [2020-07-21 10:40:46,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:46,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 10:40:46,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:40:46,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:47,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:47,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:47,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 10:40:47,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020361637] [2020-07-21 10:40:47,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:47,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2020-07-21 10:40:47,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530671812] [2020-07-21 10:40:47,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:40:47,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:47,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:40:47,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:40:47,399 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 17 states. [2020-07-21 10:40:47,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:47,621 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2020-07-21 10:40:47,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:40:47,622 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-07-21 10:40:47,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:47,624 INFO L225 Difference]: With dead ends: 34 [2020-07-21 10:40:47,624 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 10:40:47,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:40:47,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 10:40:47,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-21 10:40:47,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 10:40:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-07-21 10:40:47,634 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 27 [2020-07-21 10:40:47,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:47,635 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-07-21 10:40:47,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:40:47,635 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-07-21 10:40:47,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 10:40:47,637 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:47,637 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:47,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:47,852 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:47,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:47,853 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2020-07-21 10:40:47,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:47,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238559339] [2020-07-21 10:40:47,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) [2020-07-21 10:40:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:47,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 10:40:47,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 10:40:47,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:48,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:48,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:48,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 10:40:48,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238559339] [2020-07-21 10:40:48,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:48,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2020-07-21 10:40:48,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041116157] [2020-07-21 10:40:48,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:40:48,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:48,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:40:48,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:40:48,364 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 17 states. [2020-07-21 10:40:48,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:48,667 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2020-07-21 10:40:48,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:40:48,667 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-07-21 10:40:48,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:48,671 INFO L225 Difference]: With dead ends: 39 [2020-07-21 10:40:48,671 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 10:40:48,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:40:48,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 10:40:48,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-21 10:40:48,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 10:40:48,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 51 transitions. [2020-07-21 10:40:48,688 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 51 transitions. Word has length 28 [2020-07-21 10:40:48,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:48,688 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 51 transitions. [2020-07-21 10:40:48,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:40:48,689 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 51 transitions. [2020-07-21 10:40:48,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 10:40:48,691 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:48,691 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:48,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:48,893 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:48,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:48,893 INFO L82 PathProgramCache]: Analyzing trace with hash -928122994, now seen corresponding path program 2 times [2020-07-21 10:40:48,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:48,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224498111] [2020-07-21 10:40:48,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:48,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:40:48,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 10:40:48,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 10:40:49,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224498111] [2020-07-21 10:40:49,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:49,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-21 10:40:49,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142264463] [2020-07-21 10:40:49,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:40:49,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:49,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:40:49,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:40:49,161 INFO L87 Difference]: Start difference. First operand 34 states and 51 transitions. Second operand 11 states. [2020-07-21 10:40:49,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:49,388 INFO L93 Difference]: Finished difference Result 68 states and 116 transitions. [2020-07-21 10:40:49,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:40:49,389 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 10:40:49,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:49,393 INFO L225 Difference]: With dead ends: 68 [2020-07-21 10:40:49,393 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 10:40:49,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-07-21 10:40:49,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 10:40:49,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-07-21 10:40:49,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 10:40:49,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-07-21 10:40:49,416 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 41 [2020-07-21 10:40:49,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:49,417 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-07-21 10:40:49,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:40:49,417 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-07-21 10:40:49,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 10:40:49,419 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:49,420 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:49,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:49,633 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:49,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:49,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1952548262, now seen corresponding path program 2 times [2020-07-21 10:40:49,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:49,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480863020] [2020-07-21 10:40:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:49,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 10:40:49,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:40:49,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:49,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480863020] [2020-07-21 10:40:49,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:49,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 10:40:49,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124811628] [2020-07-21 10:40:49,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 10:40:49,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:49,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 10:40:49,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:40:49,705 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 6 states. [2020-07-21 10:40:49,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:49,808 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2020-07-21 10:40:49,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:40:49,809 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-07-21 10:40:49,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:49,810 INFO L225 Difference]: With dead ends: 62 [2020-07-21 10:40:49,811 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 10:40:49,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-21 10:40:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 10:40:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-21 10:40:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 10:40:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-07-21 10:40:49,818 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 40 [2020-07-21 10:40:49,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:49,818 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-07-21 10:40:49,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 10:40:49,819 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-07-21 10:40:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 10:40:49,820 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:49,820 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:50,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:50,035 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:50,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:50,036 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 3 times [2020-07-21 10:40:50,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:50,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541038063] [2020-07-21 10:40:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:50,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:40:50,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 10:40:50,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:50,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:50,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-21 10:40:50,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541038063] [2020-07-21 10:40:50,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:50,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 10:40:50,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847676884] [2020-07-21 10:40:50,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:40:50,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:50,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:40:50,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:40:50,406 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 11 states. [2020-07-21 10:40:50,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:50,564 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2020-07-21 10:40:50,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:40:50,564 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 10:40:50,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:50,566 INFO L225 Difference]: With dead ends: 57 [2020-07-21 10:40:50,566 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 10:40:50,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-07-21 10:40:50,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 10:40:50,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 10:40:50,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 10:40:50,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-07-21 10:40:50,582 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 41 [2020-07-21 10:40:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:50,583 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-07-21 10:40:50,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:40:50,583 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-07-21 10:40:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 10:40:50,589 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:50,589 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:50,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:50,807 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:50,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:50,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 4 times [2020-07-21 10:40:50,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:50,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780529390] [2020-07-21 10:40:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:50,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 10:40:50,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 10:40:51,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:51,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:51,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:51,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:51,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:51,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:51,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:51,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:51,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:51,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:51,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:51,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-21 10:40:51,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780529390] [2020-07-21 10:40:51,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:51,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2020-07-21 10:40:51,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171484853] [2020-07-21 10:40:51,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 10:40:51,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:51,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 10:40:51,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:40:51,755 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 23 states. [2020-07-21 10:40:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:52,155 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2020-07-21 10:40:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 10:40:52,156 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42 [2020-07-21 10:40:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:52,158 INFO L225 Difference]: With dead ends: 51 [2020-07-21 10:40:52,158 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 10:40:52,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 10:40:52,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 10:40:52,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-07-21 10:40:52,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 10:40:52,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2020-07-21 10:40:52,168 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 42 [2020-07-21 10:40:52,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:52,168 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2020-07-21 10:40:52,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 10:40:52,169 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2020-07-21 10:40:52,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-21 10:40:52,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:52,171 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:52,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:52,384 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:52,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:52,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1434057987, now seen corresponding path program 5 times [2020-07-21 10:40:52,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:52,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6018632] [2020-07-21 10:40:52,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:52,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:40:52,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 72 proven. 104 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-07-21 10:40:52,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:52,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:52,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:52,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 72 proven. 107 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-07-21 10:40:53,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6018632] [2020-07-21 10:40:53,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:53,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:40:53,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506210938] [2020-07-21 10:40:53,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:40:53,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:53,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:40:53,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:40:53,005 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand 13 states. [2020-07-21 10:40:53,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:53,241 INFO L93 Difference]: Finished difference Result 88 states and 136 transitions. [2020-07-21 10:40:53,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:40:53,242 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 83 [2020-07-21 10:40:53,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:53,243 INFO L225 Difference]: With dead ends: 88 [2020-07-21 10:40:53,243 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 10:40:53,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 145 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:40:53,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 10:40:53,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-07-21 10:40:53,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 10:40:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2020-07-21 10:40:53,253 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 83 [2020-07-21 10:40:53,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:53,254 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2020-07-21 10:40:53,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:40:53,254 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2020-07-21 10:40:53,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-21 10:40:53,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:53,255 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:53,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:53,461 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:53,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:53,462 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 6 times [2020-07-21 10:40:53,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:53,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073508191] [2020-07-21 10:40:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:53,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:40:53,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 106 proven. 170 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-07-21 10:40:53,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:54,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:54,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:54,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:54,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:54,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 106 proven. 182 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-07-21 10:40:54,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073508191] [2020-07-21 10:40:54,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:54,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 10:40:54,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70750909] [2020-07-21 10:40:54,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:40:54,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:54,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:40:54,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:40:54,445 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 17 states. [2020-07-21 10:40:54,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:54,855 INFO L93 Difference]: Finished difference Result 106 states and 164 transitions. [2020-07-21 10:40:54,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 10:40:54,856 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-07-21 10:40:54,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:54,859 INFO L225 Difference]: With dead ends: 106 [2020-07-21 10:40:54,859 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 10:40:54,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 169 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-07-21 10:40:54,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 10:40:54,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2020-07-21 10:40:54,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 10:40:54,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 84 transitions. [2020-07-21 10:40:54,872 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 84 transitions. Word has length 97 [2020-07-21 10:40:54,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:54,872 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 84 transitions. [2020-07-21 10:40:54,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:40:54,873 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 84 transitions. [2020-07-21 10:40:54,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-21 10:40:54,874 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:54,874 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 8, 8, 8, 8, 8, 8, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:55,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:55,084 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:55,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:55,084 INFO L82 PathProgramCache]: Analyzing trace with hash -680629368, now seen corresponding path program 7 times [2020-07-21 10:40:55,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:55,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190850605] [2020-07-21 10:40:55,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:55,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:40:55,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 197 proven. 279 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2020-07-21 10:40:55,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:56,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:56,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:56,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:56,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:56,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:56,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:56,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:56,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:56,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:56,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:56,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 197 proven. 306 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2020-07-21 10:40:56,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190850605] [2020-07-21 10:40:56,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:56,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 10:40:56,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741426499] [2020-07-21 10:40:56,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 10:40:56,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:56,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 10:40:56,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:40:56,761 INFO L87 Difference]: Start difference. First operand 60 states and 84 transitions. Second operand 21 states. [2020-07-21 10:40:57,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:57,312 INFO L93 Difference]: Finished difference Result 130 states and 222 transitions. [2020-07-21 10:40:57,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 10:40:57,314 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 124 [2020-07-21 10:40:57,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:57,317 INFO L225 Difference]: With dead ends: 130 [2020-07-21 10:40:57,317 INFO L226 Difference]: Without dead ends: 79 [2020-07-21 10:40:57,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 211 SyntacticMatches, 17 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 10:40:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-21 10:40:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-07-21 10:40:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 10:40:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2020-07-21 10:40:57,330 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 124 [2020-07-21 10:40:57,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:57,330 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2020-07-21 10:40:57,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 10:40:57,330 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2020-07-21 10:40:57,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-07-21 10:40:57,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:57,333 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:57,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:57,543 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:57,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:57,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1288458278, now seen corresponding path program 8 times [2020-07-21 10:40:57,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:57,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404104170] [2020-07-21 10:40:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:57,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 10:40:57,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 453 proven. 734 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2020-07-21 10:40:57,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:58,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:59,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:59,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:59,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:59,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:59,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:00,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:00,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:00,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:00,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:00,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 453 proven. 782 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2020-07-21 10:41:00,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404104170] [2020-07-21 10:41:00,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:00,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 10:41:00,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158979968] [2020-07-21 10:41:00,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 10:41:00,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:00,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 10:41:00,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 10:41:00,308 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand 25 states. [2020-07-21 10:41:01,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:01,161 INFO L93 Difference]: Finished difference Result 157 states and 259 transitions. [2020-07-21 10:41:01,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 10:41:01,165 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 205 [2020-07-21 10:41:01,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:01,167 INFO L225 Difference]: With dead ends: 157 [2020-07-21 10:41:01,167 INFO L226 Difference]: Without dead ends: 94 [2020-07-21 10:41:01,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 365 SyntacticMatches, 21 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=539, Invalid=1531, Unknown=0, NotChecked=0, Total=2070 [2020-07-21 10:41:01,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-21 10:41:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2020-07-21 10:41:01,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-21 10:41:01,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 112 transitions. [2020-07-21 10:41:01,181 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 112 transitions. Word has length 205 [2020-07-21 10:41:01,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:01,182 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 112 transitions. [2020-07-21 10:41:01,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 10:41:01,182 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 112 transitions. [2020-07-21 10:41:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-21 10:41:01,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:01,184 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:41:01,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:01,399 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:01,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:01,400 INFO L82 PathProgramCache]: Analyzing trace with hash 375112636, now seen corresponding path program 9 times [2020-07-21 10:41:01,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:01,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906613408] [2020-07-21 10:41:01,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:01,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 65 conjunts are in the unsatisfiable core [2020-07-21 10:41:01,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 258 proven. 604 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2020-07-21 10:41:01,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:41:02,939 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 10:41:03,067 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 10:41:03,211 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 10:41:03,362 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 10:41:04,020 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 10:41:04,286 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 10:41:04,570 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-07-21 10:41:04,836 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-07-21 10:41:07,163 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 10:41:07,298 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 10:41:07,452 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 10:41:07,591 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 10:41:08,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:08,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:08,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:09,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:09,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:10,054 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-21 10:41:10,164 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-21 10:41:10,276 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-07-21 10:41:10,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:10,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:10,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:10,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:10,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:10,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:10,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:10,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:10,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 207 proven. 695 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2020-07-21 10:41:11,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906613408] [2020-07-21 10:41:11,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:11,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 35] total 48 [2020-07-21 10:41:11,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112278793] [2020-07-21 10:41:11,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-21 10:41:11,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:11,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-21 10:41:11,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1962, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 10:41:11,601 INFO L87 Difference]: Start difference. First operand 84 states and 112 transitions. Second operand 48 states. [2020-07-21 10:41:12,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:12,707 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2020-07-21 10:41:12,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-21 10:41:12,709 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 178 [2020-07-21 10:41:12,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:12,710 INFO L225 Difference]: With dead ends: 90 [2020-07-21 10:41:12,710 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 10:41:12,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 268 SyntacticMatches, 41 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2291 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=658, Invalid=4034, Unknown=0, NotChecked=0, Total=4692 [2020-07-21 10:41:12,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 10:41:12,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 10:41:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 10:41:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 10:41:12,713 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 178 [2020-07-21 10:41:12,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:12,713 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 10:41:12,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-21 10:41:12,713 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 10:41:12,714 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 10:41:12,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:12,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 10:41:13,726 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 19 [2020-07-21 10:41:13,729 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-21 10:41:13,730 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-21 10:41:13,730 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-07-21 10:41:13,730 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-21 10:41:13,730 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (and (<= 1 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (or (and (<= 2 |fibonacci_#t~ret0|) (< |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 5))) (<= |fibonacci_#in~n| 3)) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-07-21 10:41:13,730 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-21 10:41:13,730 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-07-21 10:41:13,731 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-07-21 10:41:13,731 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-07-21 10:41:13,731 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 10:41:13,731 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:41:13,731 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:41:13,731 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 10:41:13,731 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 10:41:13,731 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 10:41:13,732 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-07-21 10:41:13,732 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-07-21 10:41:13,732 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-07-21 10:41:13,732 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-07-21 10:41:13,732 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-07-21 10:41:13,732 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-07-21 10:41:13,732 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-07-21 10:41:13,733 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-07-21 10:41:13,733 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-07-21 10:41:13,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:41:13 BoogieIcfgContainer [2020-07-21 10:41:13,741 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:41:13,744 INFO L168 Benchmark]: Toolchain (without parser) took 29025.37 ms. Allocated memory was 146.8 MB in the beginning and 405.3 MB in the end (delta: 258.5 MB). Free memory was 105.0 MB in the beginning and 257.3 MB in the end (delta: -152.3 MB). Peak memory consumption was 106.2 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:13,748 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 10:41:13,754 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.68 ms. Allocated memory is still 146.8 MB. Free memory was 104.8 MB in the beginning and 94.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:13,755 INFO L168 Benchmark]: Boogie Preprocessor took 34.87 ms. Allocated memory is still 146.8 MB. Free memory was 94.9 MB in the beginning and 93.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:13,756 INFO L168 Benchmark]: RCFGBuilder took 376.76 ms. Allocated memory was 146.8 MB in the beginning and 205.0 MB in the end (delta: 58.2 MB). Free memory was 93.6 MB in the beginning and 172.1 MB in the end (delta: -78.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:13,759 INFO L168 Benchmark]: TraceAbstraction took 28370.33 ms. Allocated memory was 205.0 MB in the beginning and 405.3 MB in the end (delta: 200.3 MB). Free memory was 172.1 MB in the beginning and 257.3 MB in the end (delta: -85.1 MB). Peak memory consumption was 115.2 MB. Max. memory is 7.1 GB. [2020-07-21 10:41:13,764 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 237.68 ms. Allocated memory is still 146.8 MB. Free memory was 104.8 MB in the beginning and 94.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.87 ms. Allocated memory is still 146.8 MB. Free memory was 94.9 MB in the beginning and 93.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 376.76 ms. Allocated memory was 146.8 MB in the beginning and 205.0 MB in the end (delta: 58.2 MB). Free memory was 93.6 MB in the beginning and 172.1 MB in the end (delta: -78.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28370.33 ms. Allocated memory was 205.0 MB in the beginning and 405.3 MB in the end (delta: 200.3 MB). Free memory was 172.1 MB in the beginning and 257.3 MB in the end (delta: -85.1 MB). Peak memory consumption was 115.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: 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 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 27.4s, OverallIterations: 13, TraceHistogramMax: 29, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 258 SDtfs, 912 SDslu, 1279 SDs, 0 SdLazy, 2228 SolverSat, 1131 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1912 GetRequests, 1478 SyntacticMatches, 127 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3565 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=12, 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, 13 MinimizatonAttempts, 45 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 167 PreInvPairs, 212 NumberOfFragments, 42 HoareAnnotationTreeSize, 167 FomulaSimplifications, 434 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1548 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 18.7s InterpolantComputationTime, 935 NumberOfCodeBlocks, 935 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 1778 ConstructedInterpolants, 0 QuantifiedInterpolants, 541358 SizeOfPredicates, 78 NumberOfNonLiveVariables, 2113 ConjunctsInSsa, 207 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 7005/11113 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...