/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:54:16,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:54:16,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:54:16,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:54:16,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:54:16,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:54:16,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:54:16,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:54:16,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:54:16,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:54:16,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:54:16,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:54:16,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:54:16,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:54:16,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:54:16,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:54:16,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:54:16,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:54:16,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:54:16,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:54:16,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:54:16,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:54:16,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:54:16,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:54:16,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:54:16,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:54:16,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:54:16,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:54:16,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:54:16,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 14:54:16,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 14:54:16,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 14:54:16,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 14:54:16,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 14:54:16,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 14:54:16,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 14:54:16,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 14:54:16,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 14:54:16,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:54:16,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:54:16,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:54:16,478 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 14:54:16,517 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:54:16,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:54:16,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:54:16,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:54:16,520 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:54:16,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:54:16,520 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:54:16,521 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:54:16,521 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:54:16,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:54:16,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:54:16,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:54:16,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:54:16,523 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:54:16,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:54:16,523 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:54:16,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:54:16,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:54:16,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:54:16,524 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:54:16,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:54:16,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:54:16,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:54:16,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:54:16,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:54:16,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:54:16,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:54:16,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:54:16,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:54:16,526 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:54:16,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:54:16,852 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:54:16,861 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:54:16,862 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:54:16,863 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:54:16,863 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-08-21 14:54:16,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ee4572f3/fc7d238a494d4b8f8c8c93274e115f48/FLAG38573a3be [2020-08-21 14:54:17,352 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:54:17,353 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-08-21 14:54:17,359 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ee4572f3/fc7d238a494d4b8f8c8c93274e115f48/FLAG38573a3be [2020-08-21 14:54:17,723 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ee4572f3/fc7d238a494d4b8f8c8c93274e115f48 [2020-08-21 14:54:17,732 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:54:17,733 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:54:17,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:54:17,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:54:17,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:54:17,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:54:17" (1/1) ... [2020-08-21 14:54:17,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c77fbdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:54:17, skipping insertion in model container [2020-08-21 14:54:17,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:54:17" (1/1) ... [2020-08-21 14:54:17,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:54:17,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:54:17,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:54:17,990 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:54:18,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:54:18,023 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:54:18,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:54:18 WrapperNode [2020-08-21 14:54:18,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:54:18,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:54:18,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:54:18,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:54:18,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:54:18" (1/1) ... [2020-08-21 14:54:18,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:54:18" (1/1) ... [2020-08-21 14:54:18,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:54:18" (1/1) ... [2020-08-21 14:54:18,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:54:18" (1/1) ... [2020-08-21 14:54:18,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:54:18" (1/1) ... [2020-08-21 14:54:18,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:54:18" (1/1) ... [2020-08-21 14:54:18,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:54:18" (1/1) ... [2020-08-21 14:54:18,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:54:18,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:54:18,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:54:18,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:54:18,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:54:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 14:54:18,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:54:18,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:54:18,254 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-21 14:54:18,254 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-21 14:54:18,254 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:54:18,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:54:18,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:54:18,255 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-21 14:54:18,255 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-21 14:54:18,255 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:54:18,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:54:18,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:54:18,455 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:54:18,456 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 14:54:18,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:54:18 BoogieIcfgContainer [2020-08-21 14:54:18,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:54:18,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:54:18,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:54:18,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:54:18,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:54:17" (1/3) ... [2020-08-21 14:54:18,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73795d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:54:18, skipping insertion in model container [2020-08-21 14:54:18,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:54:18" (2/3) ... [2020-08-21 14:54:18,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73795d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:54:18, skipping insertion in model container [2020-08-21 14:54:18,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:54:18" (3/3) ... [2020-08-21 14:54:18,469 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2020-08-21 14:54:18,483 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:54:18,493 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:54:18,513 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:54:18,546 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:54:18,546 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:54:18,546 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:54:18,547 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:54:18,547 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:54:18,547 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:54:18,547 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:54:18,547 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:54:18,590 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-21 14:54:18,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 14:54:18,601 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:54:18,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:54:18,602 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:54:18,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:54:18,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-21 14:54:18,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:54:18,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403760400] [2020-08-21 14:54:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:54:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:18,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:54:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:18,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:54:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:54:18,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403760400] [2020-08-21 14:54:18,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:54:18,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:54:18,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732940471] [2020-08-21 14:54:18,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:54:18,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:54:18,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:54:18,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:54:18,866 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-21 14:54:18,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:54:18,986 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-21 14:54:18,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:54:18,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 14:54:18,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:54:19,002 INFO L225 Difference]: With dead ends: 44 [2020-08-21 14:54:19,002 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 14:54:19,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:54:19,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 14:54:19,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 14:54:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 14:54:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-21 14:54:19,060 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-21 14:54:19,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:54:19,060 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-21 14:54:19,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:54:19,061 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-21 14:54:19,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 14:54:19,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:54:19,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:54:19,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:54:19,064 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:54:19,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:54:19,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-21 14:54:19,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:54:19,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459927298] [2020-08-21 14:54:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:54:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:19,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:54:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:19,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:54:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:54:19,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459927298] [2020-08-21 14:54:19,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:54:19,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:54:19,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762190295] [2020-08-21 14:54:19,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:54:19,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:54:19,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:54:19,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:54:19,139 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-21 14:54:19,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:54:19,211 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-21 14:54:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:54:19,212 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-21 14:54:19,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:54:19,214 INFO L225 Difference]: With dead ends: 36 [2020-08-21 14:54:19,215 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 14:54:19,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:54:19,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 14:54:19,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 14:54:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 14:54:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-21 14:54:19,227 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-21 14:54:19,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:54:19,228 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-21 14:54:19,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:54:19,228 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-21 14:54:19,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 14:54:19,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:54:19,230 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:54:19,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:54:19,231 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:54:19,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:54:19,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-21 14:54:19,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:54:19,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739881325] [2020-08-21 14:54:19,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:54:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:19,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:54:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:19,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:54:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:19,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:19,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:54:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 14:54:19,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739881325] [2020-08-21 14:54:19,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:54:19,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 14:54:19,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391428834] [2020-08-21 14:54:19,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:54:19,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:54:19,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:54:19,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:54:19,400 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-21 14:54:19,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:54:19,491 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-21 14:54:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 14:54:19,492 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-21 14:54:19,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:54:19,494 INFO L225 Difference]: With dead ends: 58 [2020-08-21 14:54:19,494 INFO L226 Difference]: Without dead ends: 34 [2020-08-21 14:54:19,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:54:19,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-21 14:54:19,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-21 14:54:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 14:54:19,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-21 14:54:19,506 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-21 14:54:19,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:54:19,506 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-21 14:54:19,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:54:19,507 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-21 14:54:19,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 14:54:19,509 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:54:19,509 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:54:19,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:54:19,510 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:54:19,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:54:19,510 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-21 14:54:19,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:54:19,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176968929] [2020-08-21 14:54:19,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:54:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:19,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:54:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:19,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:54:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:19,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:19,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:54:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 14:54:19,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176968929] [2020-08-21 14:54:19,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:54:19,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 14:54:19,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019861639] [2020-08-21 14:54:19,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:54:19,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:54:19,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:54:19,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:54:19,765 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-08-21 14:54:19,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:54:19,833 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-08-21 14:54:19,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:54:19,834 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-08-21 14:54:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:54:19,836 INFO L225 Difference]: With dead ends: 46 [2020-08-21 14:54:19,836 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 14:54:19,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:54:19,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 14:54:19,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-08-21 14:54:19,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-21 14:54:19,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-08-21 14:54:19,848 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2020-08-21 14:54:19,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:54:19,848 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-08-21 14:54:19,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:54:19,848 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-08-21 14:54:19,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 14:54:19,850 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:54:19,850 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:54:19,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:54:19,851 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:54:19,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:54:19,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1725129826, now seen corresponding path program 1 times [2020-08-21 14:54:19,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:54:19,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210150391] [2020-08-21 14:54:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:54:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:19,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:54:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:19,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:54:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:19,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:19,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:54:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 14:54:19,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210150391] [2020-08-21 14:54:19,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:54:19,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 14:54:19,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506294778] [2020-08-21 14:54:19,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:54:19,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:54:19,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:54:19,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:54:19,935 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 7 states. [2020-08-21 14:54:20,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:54:20,052 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2020-08-21 14:54:20,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:54:20,053 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-08-21 14:54:20,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:54:20,054 INFO L225 Difference]: With dead ends: 71 [2020-08-21 14:54:20,055 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 14:54:20,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:54:20,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 14:54:20,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 14:54:20,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 14:54:20,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-08-21 14:54:20,064 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 28 [2020-08-21 14:54:20,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:54:20,064 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-08-21 14:54:20,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:54:20,065 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-08-21 14:54:20,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 14:54:20,066 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:54:20,067 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:54:20,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:54:20,070 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:54:20,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:54:20,071 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-21 14:54:20,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:54:20,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214483617] [2020-08-21 14:54:20,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:54:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:20,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:54:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:20,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:54:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:20,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:20,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:20,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 14:54:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:20,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:54:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 14:54:20,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214483617] [2020-08-21 14:54:20,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:54:20,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 14:54:20,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758478812] [2020-08-21 14:54:20,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:54:20,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:54:20,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:54:20,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:54:20,170 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 7 states. [2020-08-21 14:54:20,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:54:20,252 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2020-08-21 14:54:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 14:54:20,252 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-08-21 14:54:20,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:54:20,254 INFO L225 Difference]: With dead ends: 74 [2020-08-21 14:54:20,254 INFO L226 Difference]: Without dead ends: 41 [2020-08-21 14:54:20,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:54:20,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-21 14:54:20,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-08-21 14:54:20,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-21 14:54:20,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-08-21 14:54:20,264 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 39 [2020-08-21 14:54:20,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:54:20,264 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-08-21 14:54:20,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:54:20,265 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-08-21 14:54:20,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 14:54:20,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:54:20,267 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:54:20,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:54:20,267 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:54:20,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:54:20,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-21 14:54:20,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:54:20,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052118345] [2020-08-21 14:54:20,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:54:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:20,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:54:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:20,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:54:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:20,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:20,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:54:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:20,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:54:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:20,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 14:54:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:54:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 14:54:20,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052118345] [2020-08-21 14:54:20,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:54:20,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 14:54:20,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886606519] [2020-08-21 14:54:20,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:54:20,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:54:20,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:54:20,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:54:20,392 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 8 states. [2020-08-21 14:54:20,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:54:20,523 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-08-21 14:54:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 14:54:20,524 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-21 14:54:20,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:54:20,525 INFO L225 Difference]: With dead ends: 41 [2020-08-21 14:54:20,525 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 14:54:20,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:54:20,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 14:54:20,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 14:54:20,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 14:54:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 14:54:20,527 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2020-08-21 14:54:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:54:20,528 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 14:54:20,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:54:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 14:54:20,528 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 14:54:20,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:54:20,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 14:54:20,675 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 14:54:20,675 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:54:20,675 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:54:20,676 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 14:54:20,676 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 14:54:20,676 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 14:54:20,677 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-08-21 14:54:20,677 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-08-21 14:54:20,677 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-08-21 14:54:20,678 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-08-21 14:54:20,678 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-21 14:54:20,678 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-21 14:54:20,679 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 2 main_~x~0) (<= main_~x~0 2)) [2020-08-21 14:54:20,679 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-08-21 14:54:20,679 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-08-21 14:54:20,680 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-08-21 14:54:20,680 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-21 14:54:20,680 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-21 14:54:20,680 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-21 14:54:20,680 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-08-21 14:54:20,681 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-08-21 14:54:20,681 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-08-21 14:54:20,681 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-08-21 14:54:20,682 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-08-21 14:54:20,682 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-08-21 14:54:20,682 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-08-21 14:54:20,682 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-21 14:54:20,683 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 3 |fibo1_#in~n|)) (and (<= |fibo1_#t~ret0| 1) (< 1 fibo1_~n) (<= 1 |fibo1_#t~ret0|) .cse0))) [2020-08-21 14:54:20,683 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-08-21 14:54:20,683 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-08-21 14:54:20,683 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-08-21 14:54:20,683 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-08-21 14:54:20,683 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-08-21 14:54:20,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:54:20 BoogieIcfgContainer [2020-08-21 14:54:20,690 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:54:20,693 INFO L168 Benchmark]: Toolchain (without parser) took 2959.13 ms. Allocated memory was 141.0 MB in the beginning and 242.2 MB in the end (delta: 101.2 MB). Free memory was 104.4 MB in the beginning and 207.6 MB in the end (delta: -103.2 MB). Peak memory consumption was 106.4 MB. Max. memory is 7.1 GB. [2020-08-21 14:54:20,694 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 14:54:20,695 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.86 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 94.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-21 14:54:20,696 INFO L168 Benchmark]: Boogie Preprocessor took 153.24 ms. Allocated memory was 141.0 MB in the beginning and 207.6 MB in the end (delta: 66.6 MB). Free memory was 94.4 MB in the beginning and 186.4 MB in the end (delta: -91.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 14:54:20,697 INFO L168 Benchmark]: RCFGBuilder took 282.04 ms. Allocated memory is still 207.6 MB. Free memory was 186.4 MB in the beginning and 172.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-08-21 14:54:20,698 INFO L168 Benchmark]: TraceAbstraction took 2229.08 ms. Allocated memory was 207.6 MB in the beginning and 242.2 MB in the end (delta: 34.6 MB). Free memory was 172.8 MB in the beginning and 207.6 MB in the end (delta: -34.8 MB). Peak memory consumption was 108.2 MB. Max. memory is 7.1 GB. [2020-08-21 14:54:20,702 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 289.86 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 94.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 153.24 ms. Allocated memory was 141.0 MB in the beginning and 207.6 MB in the end (delta: 66.6 MB). Free memory was 94.4 MB in the beginning and 186.4 MB in the end (delta: -91.9 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 282.04 ms. Allocated memory is still 207.6 MB. Free memory was 186.4 MB in the beginning and 172.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2229.08 ms. Allocated memory was 207.6 MB in the beginning and 242.2 MB in the end (delta: 34.6 MB). Free memory was 172.8 MB in the beginning and 207.6 MB in the end (delta: -34.8 MB). Peak memory consumption was 108.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 212 SDtfs, 96 SDslu, 767 SDs, 0 SdLazy, 354 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 113 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 65 PreInvPairs, 73 NumberOfFragments, 57 HoareAnnotationTreeSize, 65 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 187 NumberOfCodeBlocks, 187 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 10186 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 27/46 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...