/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 10:56:36,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 10:56:36,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 10:56:36,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 10:56:36,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 10:56:36,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 10:56:36,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 10:56:36,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 10:56:36,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 10:56:36,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 10:56:36,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 10:56:36,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 10:56:36,854 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 10:56:36,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 10:56:36,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 10:56:36,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 10:56:36,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 10:56:36,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 10:56:36,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 10:56:36,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 10:56:36,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 10:56:36,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 10:56:36,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 10:56:36,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 10:56:36,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 10:56:36,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 10:56:36,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 10:56:36,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 10:56:36,898 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 [2020-07-07 10:56:36,921 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 10:56:36,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 10:56:36,923 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 10:56:36,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 10:56:36,924 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 10:56:36,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 10:56:36,924 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 10:56:36,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 10:56:36,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 10:56:36,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 10:56:36,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 10:56:36,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 10:56:36,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 10:56:36,927 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 10:56:36,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 10:56:36,927 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 10:56:36,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 10:56:36,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 10:56:36,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 10:56:36,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 10:56:36,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 10:56:36,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 10:56:36,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 10:56:36,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 10:56:36,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 10:56:36,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 10:56:36,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 10:56:36,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 10:56:36,930 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 10:56:36,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 10:56:37,202 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 10:56:37,215 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 10:56:37,219 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 10:56:37,221 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 10:56:37,221 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 10:56:37,222 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-07-07 10:56:37,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcb319f57/ba1dbd0077024c91ae7923497f5842c9/FLAG2124f2350 [2020-07-07 10:56:37,736 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 10:56:37,737 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-07-07 10:56:37,742 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcb319f57/ba1dbd0077024c91ae7923497f5842c9/FLAG2124f2350 [2020-07-07 10:56:38,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcb319f57/ba1dbd0077024c91ae7923497f5842c9 [2020-07-07 10:56:38,148 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 10:56:38,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 10:56:38,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 10:56:38,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 10:56:38,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 10:56:38,158 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 10:56:38" (1/1) ... [2020-07-07 10:56:38,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c71e754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:38, skipping insertion in model container [2020-07-07 10:56:38,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 10:56:38" (1/1) ... [2020-07-07 10:56:38,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 10:56:38,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 10:56:38,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 10:56:38,400 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 10:56:38,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 10:56:38,427 INFO L208 MainTranslator]: Completed translation [2020-07-07 10:56:38,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:38 WrapperNode [2020-07-07 10:56:38,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 10:56:38,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 10:56:38,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 10:56:38,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 10:56:38,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:38" (1/1) ... [2020-07-07 10:56:38,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:38" (1/1) ... [2020-07-07 10:56:38,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:38" (1/1) ... [2020-07-07 10:56:38,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:38" (1/1) ... [2020-07-07 10:56:38,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:38" (1/1) ... [2020-07-07 10:56:38,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:38" (1/1) ... [2020-07-07 10:56:38,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:38" (1/1) ... [2020-07-07 10:56:38,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 10:56:38,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 10:56:38,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 10:56:38,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 10:56:38,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:38" (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 [2020-07-07 10:56:38,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 10:56:38,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 10:56:38,595 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-07 10:56:38,595 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 10:56:38,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 10:56:38,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 10:56:38,595 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-07 10:56:38,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 10:56:38,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 10:56:38,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 10:56:38,780 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 10:56:38,781 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 10:56:38,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 10:56:38 BoogieIcfgContainer [2020-07-07 10:56:38,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 10:56:38,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 10:56:38,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 10:56:38,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 10:56:38,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 10:56:38" (1/3) ... [2020-07-07 10:56:38,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424aa05d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 10:56:38, skipping insertion in model container [2020-07-07 10:56:38,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:38" (2/3) ... [2020-07-07 10:56:38,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424aa05d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 10:56:38, skipping insertion in model container [2020-07-07 10:56:38,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 10:56:38" (3/3) ... [2020-07-07 10:56:38,792 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-07-07 10:56:38,803 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 10:56:38,810 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 10:56:38,824 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 10:56:38,846 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 10:56:38,846 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 10:56:38,846 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 10:56:38,847 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 10:56:38,847 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 10:56:38,847 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 10:56:38,847 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 10:56:38,847 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 10:56:38,862 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-07 10:56:38,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-07 10:56:38,868 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:38,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:38,869 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:38,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:38,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-07-07 10:56:38,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:38,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578571348] [2020-07-07 10:56:38,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 10:56:39,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578571348] [2020-07-07 10:56:39,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 10:56:39,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 10:56:39,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638621198] [2020-07-07 10:56:39,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 10:56:39,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:39,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 10:56:39,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 10:56:39,153 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-07-07 10:56:39,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:39,292 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-07-07 10:56:39,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 10:56:39,294 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-07 10:56:39,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:39,304 INFO L225 Difference]: With dead ends: 36 [2020-07-07 10:56:39,305 INFO L226 Difference]: Without dead ends: 22 [2020-07-07 10:56:39,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 10:56:39,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-07 10:56:39,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-07 10:56:39,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-07 10:56:39,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-07 10:56:39,360 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-07-07 10:56:39,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:39,360 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-07 10:56:39,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 10:56:39,361 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-07 10:56:39,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 10:56:39,363 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:39,364 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] [2020-07-07 10:56:39,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 10:56:39,364 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:39,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:39,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-07-07 10:56:39,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:39,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380020985] [2020-07-07 10:56:39,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 10:56:39,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380020985] [2020-07-07 10:56:39,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815148373] [2020-07-07 10:56:39,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,610 INFO L264 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-07 10:56:39,617 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 10:56:39,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:39,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 14 [2020-07-07 10:56:39,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374941539] [2020-07-07 10:56:39,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 10:56:39,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:39,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 10:56:39,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-07-07 10:56:39,814 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 14 states. [2020-07-07 10:56:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:40,015 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2020-07-07 10:56:40,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 10:56:40,016 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-07-07 10:56:40,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:40,017 INFO L225 Difference]: With dead ends: 39 [2020-07-07 10:56:40,017 INFO L226 Difference]: Without dead ends: 24 [2020-07-07 10:56:40,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-07-07 10:56:40,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-07 10:56:40,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-07 10:56:40,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-07 10:56:40,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-07 10:56:40,027 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2020-07-07 10:56:40,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:40,028 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-07 10:56:40,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 10:56:40,028 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-07 10:56:40,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 10:56:40,030 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:40,030 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:40,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 10:56:40,244 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:40,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:40,245 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2020-07-07 10:56:40,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:40,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211256557] [2020-07-07 10:56:40,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-07 10:56:40,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211256557] [2020-07-07 10:56:40,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987700234] [2020-07-07 10:56:40,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:40,463 INFO L264 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-07 10:56:40,465 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-07 10:56:40,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:40,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-07-07 10:56:40,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123418317] [2020-07-07 10:56:40,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 10:56:40,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:40,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 10:56:40,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-07-07 10:56:40,612 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 17 states. [2020-07-07 10:56:40,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:40,847 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2020-07-07 10:56:40,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 10:56:40,848 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-07-07 10:56:40,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:40,850 INFO L225 Difference]: With dead ends: 34 [2020-07-07 10:56:40,850 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 10:56:40,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2020-07-07 10:56:40,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 10:56:40,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-07-07 10:56:40,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-07 10:56:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2020-07-07 10:56:40,859 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2020-07-07 10:56:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:40,860 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2020-07-07 10:56:40,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 10:56:40,861 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2020-07-07 10:56:40,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-07 10:56:40,862 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:40,863 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:41,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:41,077 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:41,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 2 times [2020-07-07 10:56:41,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:41,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91165806] [2020-07-07 10:56:41,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-07 10:56:41,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91165806] [2020-07-07 10:56:41,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280006734] [2020-07-07 10:56:41,275 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-07-07 10:56:41,307 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:41,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:41,308 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 10:56:41,311 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-07 10:56:41,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:41,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-07-07 10:56:41,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960131649] [2020-07-07 10:56:41,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 10:56:41,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:41,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 10:56:41,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-07 10:56:41,354 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 11 states. [2020-07-07 10:56:41,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:41,471 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions. [2020-07-07 10:56:41,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 10:56:41,472 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-07 10:56:41,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:41,474 INFO L225 Difference]: With dead ends: 56 [2020-07-07 10:56:41,474 INFO L226 Difference]: Without dead ends: 34 [2020-07-07 10:56:41,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-07-07 10:56:41,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-07 10:56:41,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-07-07 10:56:41,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-07 10:56:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2020-07-07 10:56:41,484 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 41 [2020-07-07 10:56:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:41,484 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2020-07-07 10:56:41,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 10:56:41,485 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2020-07-07 10:56:41,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-07 10:56:41,486 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:41,486 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:41,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:41,700 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:41,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:41,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 3 times [2020-07-07 10:56:41,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:41,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791753199] [2020-07-07 10:56:41,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 10:56:41,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791753199] [2020-07-07 10:56:41,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961226701] [2020-07-07 10:56:41,880 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-07-07 10:56:41,909 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-07-07 10:56:41,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:41,910 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-07 10:56:41,913 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:42,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:42,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2020-07-07 10:56:42,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700391148] [2020-07-07 10:56:42,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-07 10:56:42,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:42,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-07 10:56:42,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-07-07 10:56:42,092 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 21 states. [2020-07-07 10:56:42,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:42,551 INFO L93 Difference]: Finished difference Result 45 states and 67 transitions. [2020-07-07 10:56:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 10:56:42,551 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-07-07 10:56:42,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:42,552 INFO L225 Difference]: With dead ends: 45 [2020-07-07 10:56:42,552 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 10:56:42,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2020-07-07 10:56:42,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 10:56:42,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 10:56:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 10:56:42,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 10:56:42,555 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2020-07-07 10:56:42,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:42,556 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 10:56:42,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-07 10:56:42,556 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 10:56:42,556 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 10:56:42,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:42,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 10:56:42,889 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-07 10:56:42,889 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-07 10:56:42,890 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (< 1 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-07 10:56:42,890 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-07 10:56:42,890 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (< 1 fibonacci_~n) (<= 1 |fibonacci_#t~ret0|) .cse0 (<= |fibonacci_#in~n| 2)) (and (<= fibonacci_~n (+ |fibonacci_#t~ret0| 2)) (<= 3 fibonacci_~n) .cse0))) [2020-07-07 10:56:42,890 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-07 10:56:42,890 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-07-07 10:56:42,890 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-07-07 10:56:42,891 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-07-07 10:56:42,891 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 10:56:42,891 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 10:56:42,891 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 10:56:42,891 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 10:56:42,891 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 10:56:42,891 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 10:56:42,892 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-07-07 10:56:42,892 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-07-07 10:56:42,892 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-07-07 10:56:42,892 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-07-07 10:56:42,892 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-07-07 10:56:42,892 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-07-07 10:56:42,893 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-07-07 10:56:42,893 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-07-07 10:56:42,893 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-07-07 10:56:42,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 10:56:42 BoogieIcfgContainer [2020-07-07 10:56:42,899 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 10:56:42,902 INFO L168 Benchmark]: Toolchain (without parser) took 4751.85 ms. Allocated memory was 139.5 MB in the beginning and 245.4 MB in the end (delta: 105.9 MB). Free memory was 104.5 MB in the beginning and 190.2 MB in the end (delta: -85.7 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:42,903 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 10:56:42,904 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.95 ms. Allocated memory is still 139.5 MB. Free memory was 104.1 MB in the beginning and 94.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:42,905 INFO L168 Benchmark]: Boogie Preprocessor took 25.29 ms. Allocated memory is still 139.5 MB. Free memory was 94.8 MB in the beginning and 93.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:42,906 INFO L168 Benchmark]: RCFGBuilder took 330.57 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 93.4 MB in the beginning and 170.6 MB in the end (delta: -77.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:42,907 INFO L168 Benchmark]: TraceAbstraction took 4113.29 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 170.6 MB in the beginning and 190.2 MB in the end (delta: -19.6 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:42,911 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.95 ms. Allocated memory is still 139.5 MB. Free memory was 104.1 MB in the beginning and 94.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.29 ms. Allocated memory is still 139.5 MB. Free memory was 94.8 MB in the beginning and 93.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 330.57 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 93.4 MB in the beginning and 170.6 MB in the end (delta: -77.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4113.29 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 170.6 MB in the beginning and 190.2 MB in the end (delta: -19.6 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.9s, OverallIterations: 5, TraceHistogramMax: 5, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 88 SDtfs, 67 SDslu, 420 SDs, 0 SdLazy, 608 SolverSat, 83 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 246 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=4, 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, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 35 PreInvPairs, 50 NumberOfFragments, 39 HoareAnnotationTreeSize, 35 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 101 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 290 NumberOfCodeBlocks, 282 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 281 ConstructedInterpolants, 0 QuantifiedInterpolants, 25670 SizeOfPredicates, 16 NumberOfNonLiveVariables, 302 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 164/244 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...