/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 CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:12:54,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:12:54,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:12:54,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:12:54,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:12:54,369 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:12:54,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:12:54,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:12:54,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:12:54,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:12:54,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:12:54,391 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:12:54,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:12:54,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:12:54,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:12:54,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:12:54,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:12:54,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:12:54,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:12:54,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:12:54,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:12:54,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:12:54,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:12:54,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:12:54,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:12:54,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:12:54,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:12:54,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:12:54,429 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 [2020-07-19 21:12:54,460 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:12:54,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:12:54,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:12:54,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:12:54,462 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:12:54,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:12:54,463 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:12:54,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:12:54,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:12:54,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:12:54,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:12:54,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:12:54,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:12:54,465 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:12:54,466 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:12:54,466 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:12:54,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:12:54,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:12:54,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:12:54,467 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:12:54,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:12:54,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:12:54,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:12:54,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:12:54,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:12:54,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:12:54,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:12:54,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:12:54,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:12:54,471 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:12:54,776 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:12:54,796 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:12:54,799 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:12:54,801 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:12:54,801 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:12:54,802 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci04.c [2020-07-19 21:12:54,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad48d030b/1e5decaa82474af9b3e31647e2ad49d8/FLAG530637dc1 [2020-07-19 21:12:55,271 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:12:55,272 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci04.c [2020-07-19 21:12:55,277 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad48d030b/1e5decaa82474af9b3e31647e2ad49d8/FLAG530637dc1 [2020-07-19 21:12:55,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad48d030b/1e5decaa82474af9b3e31647e2ad49d8 [2020-07-19 21:12:55,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:12:55,656 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:12:55,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:12:55,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:12:55,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:12:55,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:12:55" (1/1) ... [2020-07-19 21:12:55,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@149e319d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:55, skipping insertion in model container [2020-07-19 21:12:55,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:12:55" (1/1) ... [2020-07-19 21:12:55,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:12:55,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:12:55,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:12:55,861 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:12:55,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:12:55,886 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:12:55,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:55 WrapperNode [2020-07-19 21:12:55,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:12:55,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:12:55,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:12:55,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:12:55,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:55" (1/1) ... [2020-07-19 21:12:55,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:55" (1/1) ... [2020-07-19 21:12:55,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:55" (1/1) ... [2020-07-19 21:12:55,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:55" (1/1) ... [2020-07-19 21:12:55,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:55" (1/1) ... [2020-07-19 21:12:55,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:55" (1/1) ... [2020-07-19 21:12:55,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:55" (1/1) ... [2020-07-19 21:12:55,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:12:55,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:12:55,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:12:55,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:12:55,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:55" (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 [2020-07-19 21:12:56,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:12:56,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:12:56,056 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-19 21:12:56,056 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:12:56,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:12:56,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:12:56,057 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-19 21:12:56,057 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:12:56,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:12:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:12:56,219 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:12:56,219 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 21:12:56,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:12:56 BoogieIcfgContainer [2020-07-19 21:12:56,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:12:56,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:12:56,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:12:56,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:12:56,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:12:55" (1/3) ... [2020-07-19 21:12:56,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab2eed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:12:56, skipping insertion in model container [2020-07-19 21:12:56,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:12:55" (2/3) ... [2020-07-19 21:12:56,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab2eed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:12:56, skipping insertion in model container [2020-07-19 21:12:56,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:12:56" (3/3) ... [2020-07-19 21:12:56,230 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2020-07-19 21:12:56,238 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:12:56,244 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:12:56,258 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:12:56,280 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:12:56,280 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:12:56,280 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:12:56,280 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:12:56,280 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:12:56,281 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:12:56,281 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:12:56,281 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:12:56,297 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-19 21:12:56,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 21:12:56,303 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:56,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:56,304 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:56,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:56,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2020-07-19 21:12:56,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:56,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143173900] [2020-07-19 21:12:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56243b5f [2020-07-19 21:12:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:12:56,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143173900] [2020-07-19 21:12:56,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:12:56,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:12:56,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071452355] [2020-07-19 21:12:56,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:12:56,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:56,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:12:56,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:12:56,574 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-07-19 21:12:56,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:56,731 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-19 21:12:56,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:12:56,734 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-19 21:12:56,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:56,747 INFO L225 Difference]: With dead ends: 35 [2020-07-19 21:12:56,747 INFO L226 Difference]: Without dead ends: 21 [2020-07-19 21:12:56,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:12:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-19 21:12:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-19 21:12:56,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 21:12:56,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-19 21:12:56,800 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-19 21:12:56,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:56,801 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-19 21:12:56,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:12:56,801 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-19 21:12:56,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 21:12:56,803 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:56,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:56,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:12:56,805 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:56,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:56,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2020-07-19 21:12:56,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:56,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031968060] [2020-07-19 21:12:56,806 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56243b5f [2020-07-19 21:12:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:12:56,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031968060] [2020-07-19 21:12:56,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:12:56,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:12:56,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095245356] [2020-07-19 21:12:56,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:12:56,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:56,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:12:56,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:12:56,887 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-19 21:12:56,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:56,951 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-19 21:12:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:12:56,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-19 21:12:56,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:56,954 INFO L225 Difference]: With dead ends: 27 [2020-07-19 21:12:56,954 INFO L226 Difference]: Without dead ends: 23 [2020-07-19 21:12:56,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:12:56,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-19 21:12:56,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-19 21:12:56,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 21:12:56,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-19 21:12:56,963 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-19 21:12:56,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:56,964 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-19 21:12:56,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:12:56,964 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-19 21:12:56,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 21:12:56,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:56,966 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] [2020-07-19 21:12:56,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 21:12:56,966 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:56,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:56,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2020-07-19 21:12:56,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:56,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303261243] [2020-07-19 21:12:56,968 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56243b5f [2020-07-19 21:12:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:12:57,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303261243] [2020-07-19 21:12:57,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666141356] [2020-07-19 21:12:57,083 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56243b5f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:57,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:12:57,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:12:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 21:12:57,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:12:57,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-19 21:12:57,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565284383] [2020-07-19 21:12:57,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 21:12:57,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:57,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 21:12:57,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:12:57,219 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-19 21:12:57,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:57,340 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-07-19 21:12:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:12:57,341 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-19 21:12:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:57,342 INFO L225 Difference]: With dead ends: 38 [2020-07-19 21:12:57,342 INFO L226 Difference]: Without dead ends: 23 [2020-07-19 21:12:57,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:12:57,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-19 21:12:57,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-19 21:12:57,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-19 21:12:57,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-07-19 21:12:57,351 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-07-19 21:12:57,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:57,351 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-07-19 21:12:57,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 21:12:57,352 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-07-19 21:12:57,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-19 21:12:57,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:57,353 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] [2020-07-19 21:12:57,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 21:12:57,567 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:57,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:57,568 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2020-07-19 21:12:57,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:57,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887888766] [2020-07-19 21:12:57,568 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56243b5f [2020-07-19 21:12:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:12:57,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887888766] [2020-07-19 21:12:57,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056484252] [2020-07-19 21:12:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56243b5f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-07-19 21:12:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:57,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:12:57,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:12:57,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 21:12:57,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:12:57,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-19 21:12:57,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452093316] [2020-07-19 21:12:57,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:12:57,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:57,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:12:57,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:12:57,758 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 8 states. [2020-07-19 21:12:57,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:57,869 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-07-19 21:12:57,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:12:57,870 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-07-19 21:12:57,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:57,872 INFO L225 Difference]: With dead ends: 41 [2020-07-19 21:12:57,872 INFO L226 Difference]: Without dead ends: 37 [2020-07-19 21:12:57,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:12:57,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-19 21:12:57,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-19 21:12:57,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-19 21:12:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-07-19 21:12:57,884 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-07-19 21:12:57,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:57,884 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-07-19 21:12:57,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:12:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-07-19 21:12:57,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-19 21:12:57,886 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:57,887 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] [2020-07-19 21:12:58,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:58,101 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:58,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:58,102 INFO L82 PathProgramCache]: Analyzing trace with hash -111055954, now seen corresponding path program 2 times [2020-07-19 21:12:58,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:58,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583781628] [2020-07-19 21:12:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56243b5f [2020-07-19 21:12:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-19 21:12:58,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583781628] [2020-07-19 21:12:58,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035778555] [2020-07-19 21:12:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56243b5f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 21:12:58,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:12:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-19 21:12:58,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:12:58,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-19 21:12:58,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841248102] [2020-07-19 21:12:58,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 21:12:58,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:58,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 21:12:58,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:12:58,413 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 12 states. [2020-07-19 21:12:58,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:58,663 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2020-07-19 21:12:58,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 21:12:58,664 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-19 21:12:58,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:58,666 INFO L225 Difference]: With dead ends: 71 [2020-07-19 21:12:58,666 INFO L226 Difference]: Without dead ends: 38 [2020-07-19 21:12:58,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:12:58,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-19 21:12:58,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-19 21:12:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-19 21:12:58,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-19 21:12:58,677 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 40 [2020-07-19 21:12:58,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:58,677 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-19 21:12:58,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 21:12:58,678 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-19 21:12:58,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-19 21:12:58,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:58,681 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:58,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:58,894 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:58,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:58,894 INFO L82 PathProgramCache]: Analyzing trace with hash -383842586, now seen corresponding path program 3 times [2020-07-19 21:12:58,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:58,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525180383] [2020-07-19 21:12:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56243b5f [2020-07-19 21:12:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-19 21:12:59,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525180383] [2020-07-19 21:12:59,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956641148] [2020-07-19 21:12:59,229 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56243b5f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 21:12:59,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:12:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-19 21:12:59,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:12:59,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-19 21:12:59,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772655776] [2020-07-19 21:12:59,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 21:12:59,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:12:59,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 21:12:59,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:12:59,330 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 10 states. [2020-07-19 21:12:59,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:12:59,483 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2020-07-19 21:12:59,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:12:59,484 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-07-19 21:12:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:12:59,488 INFO L225 Difference]: With dead ends: 80 [2020-07-19 21:12:59,488 INFO L226 Difference]: Without dead ends: 76 [2020-07-19 21:12:59,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:12:59,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-19 21:12:59,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-07-19 21:12:59,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-19 21:12:59,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2020-07-19 21:12:59,503 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 68 [2020-07-19 21:12:59,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:12:59,504 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2020-07-19 21:12:59,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 21:12:59,504 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2020-07-19 21:12:59,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-19 21:12:59,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:12:59,507 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:12:59,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:12:59,723 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:12:59,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:12:59,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1110256604, now seen corresponding path program 4 times [2020-07-19 21:12:59,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:12:59,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964886238] [2020-07-19 21:12:59,726 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56243b5f [2020-07-19 21:12:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:12:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 249 proven. 381 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-07-19 21:13:00,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964886238] [2020-07-19 21:13:00,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821926967] [2020-07-19 21:13:00,142 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56243b5f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:13:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:13:00,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 21:13:00,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:13:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 327 proven. 131 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2020-07-19 21:13:00,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:13:00,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 15 [2020-07-19 21:13:00,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123600544] [2020-07-19 21:13:00,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 21:13:00,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:13:00,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 21:13:00,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:13:00,289 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand 15 states. [2020-07-19 21:13:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:13:00,879 INFO L93 Difference]: Finished difference Result 147 states and 257 transitions. [2020-07-19 21:13:00,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-19 21:13:00,879 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 150 [2020-07-19 21:13:00,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:13:00,881 INFO L225 Difference]: With dead ends: 147 [2020-07-19 21:13:00,882 INFO L226 Difference]: Without dead ends: 68 [2020-07-19 21:13:00,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2020-07-19 21:13:00,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-19 21:13:00,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2020-07-19 21:13:00,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-19 21:13:00,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2020-07-19 21:13:00,895 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 150 [2020-07-19 21:13:00,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:13:00,896 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2020-07-19 21:13:00,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 21:13:00,896 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2020-07-19 21:13:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-19 21:13:00,898 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:13:00,898 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:13:01,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 21:13:01,112 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:13:01,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:13:01,113 INFO L82 PathProgramCache]: Analyzing trace with hash 580129251, now seen corresponding path program 5 times [2020-07-19 21:13:01,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:13:01,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247428422] [2020-07-19 21:13:01,114 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56243b5f [2020-07-19 21:13:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 21:13:01,133 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 21:13:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 21:13:01,149 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 21:13:01,169 INFO L174 FreeRefinementEngine]: Strategy CAMEL_NO_AM found a feasible trace [2020-07-19 21:13:01,170 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 21:13:01,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-19 21:13:01,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:13:01 BoogieIcfgContainer [2020-07-19 21:13:01,210 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:13:01,213 INFO L168 Benchmark]: Toolchain (without parser) took 5557.98 ms. Allocated memory was 138.4 MB in the beginning and 286.3 MB in the end (delta: 147.8 MB). Free memory was 102.9 MB in the beginning and 167.2 MB in the end (delta: -64.4 MB). Peak memory consumption was 83.5 MB. Max. memory is 7.1 GB. [2020-07-19 21:13:01,214 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-19 21:13:01,214 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.98 ms. Allocated memory is still 138.4 MB. Free memory was 102.4 MB in the beginning and 93.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-19 21:13:01,215 INFO L168 Benchmark]: Boogie Preprocessor took 103.26 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 93.0 MB in the beginning and 182.1 MB in the end (delta: -89.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-07-19 21:13:01,216 INFO L168 Benchmark]: RCFGBuilder took 231.33 ms. Allocated memory is still 202.9 MB. Free memory was 182.1 MB in the beginning and 170.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-07-19 21:13:01,217 INFO L168 Benchmark]: TraceAbstraction took 4986.33 ms. Allocated memory was 202.9 MB in the beginning and 286.3 MB in the end (delta: 83.4 MB). Free memory was 169.4 MB in the beginning and 167.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 85.6 MB. Max. memory is 7.1 GB. [2020-07-19 21:13:01,221 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 228.98 ms. Allocated memory is still 138.4 MB. Free memory was 102.4 MB in the beginning and 93.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 103.26 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 93.0 MB in the beginning and 182.1 MB in the end (delta: -89.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 231.33 ms. Allocated memory is still 202.9 MB. Free memory was 182.1 MB in the beginning and 170.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4986.33 ms. Allocated memory was 202.9 MB in the beginning and 286.3 MB in the end (delta: 83.4 MB). Free memory was 169.4 MB in the beginning and 167.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 85.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 33]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L28] int x = __VERIFIER_nondet_int(); [L29] CALL, EXPR fibonacci(x) VAL [\old(n)=5] [L17] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L19] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=4] [L17] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L19] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=3] [L17] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=4, fibonacci(n-1)=2, n=4] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=4, fibonacci(n-1)=2, fibonacci(n-2)=1, n=4] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=5, fibonacci(n-1)=3, n=5] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=3] [L17] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=5, fibonacci(n-1)=3, fibonacci(n-2)=2, n=5] [L22] return fibonacci(n-1) + fibonacci(n-2); [L29] RET, EXPR fibonacci(x) VAL [fibonacci(x)=5, x=5] [L29] int result = fibonacci(x); [L30] COND FALSE !(x != 5 || result == 3) VAL [result=5, x=5] [L33] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.8s, OverallIterations: 8, TraceHistogramMax: 21, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 142 SDtfs, 197 SDslu, 454 SDs, 0 SdLazy, 743 SolverSat, 167 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 498 GetRequests, 408 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred 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, 15 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 758 NumberOfCodeBlocks, 758 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 637 ConstructedInterpolants, 0 QuantifiedInterpolants, 104123 SizeOfPredicates, 21 NumberOfNonLiveVariables, 716 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 2097/2834 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...