/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 0.1.25-3af5e1f [2020-09-04 13:04:43,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:04:43,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:04:43,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:04:43,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:04:43,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:04:43,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:04:43,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:04:43,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:04:43,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:04:43,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:04:43,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:04:43,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:04:43,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:04:43,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:04:43,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:04:43,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:04:43,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:04:43,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:04:43,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:04:43,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:04:43,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:04:43,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:04:43,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:04:43,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:04:43,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:04:43,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:04:43,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:04:43,461 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:04:43,490 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:04:43,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:04:43,491 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:04:43,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:04:43,492 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:04:43,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:04:43,492 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:04:43,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:04:43,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:04:43,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:04:43,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:04:43,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:04:43,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:04:43,493 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:04:43,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:04:43,494 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:04:43,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:04:43,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:04:43,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:04:43,495 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:04:43,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:04:43,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:04:43,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:04:43,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:04:43,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:04:43,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:04:43,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:04:43,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:04:43,497 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:04:43,497 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:04:43,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:04:43,928 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:04:43,932 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:04:43,934 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:04:43,934 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:04:43,935 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-09-04 13:04:44,007 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a52ff4dc1/770e33557eb54481bc7e5bfe89d5d921/FLAG145b98451 [2020-09-04 13:04:44,471 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:04:44,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2020-09-04 13:04:44,480 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a52ff4dc1/770e33557eb54481bc7e5bfe89d5d921/FLAG145b98451 [2020-09-04 13:04:44,818 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a52ff4dc1/770e33557eb54481bc7e5bfe89d5d921 [2020-09-04 13:04:44,833 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:04:44,835 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:04:44,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:04:44,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:04:44,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:04:44,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:04:44" (1/1) ... [2020-09-04 13:04:44,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45e0ef97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:04:44, skipping insertion in model container [2020-09-04 13:04:44,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:04:44" (1/1) ... [2020-09-04 13:04:44,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:04:44,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:04:45,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:04:45,114 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:04:45,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:04:45,151 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:04:45,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:04:45 WrapperNode [2020-09-04 13:04:45,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:04:45,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:04:45,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:04:45,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:04:45,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:04:45" (1/1) ... [2020-09-04 13:04:45,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:04:45" (1/1) ... [2020-09-04 13:04:45,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:04:45" (1/1) ... [2020-09-04 13:04:45,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:04:45" (1/1) ... [2020-09-04 13:04:45,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:04:45" (1/1) ... [2020-09-04 13:04:45,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:04:45" (1/1) ... [2020-09-04 13:04:45,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:04:45" (1/1) ... [2020-09-04 13:04:45,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:04:45,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:04:45,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:04:45,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:04:45,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:04:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:04:45,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:04:45,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:04:45,327 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-09-04 13:04:45,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:04:45,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:04:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:04:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-09-04 13:04:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:04:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:04:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:04:45,530 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:04:45,530 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:04:45,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:04:45 BoogieIcfgContainer [2020-09-04 13:04:45,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:04:45,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:04:45,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:04:45,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:04:45,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:04:44" (1/3) ... [2020-09-04 13:04:45,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2175ca27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:04:45, skipping insertion in model container [2020-09-04 13:04:45,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:04:45" (2/3) ... [2020-09-04 13:04:45,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2175ca27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:04:45, skipping insertion in model container [2020-09-04 13:04:45,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:04:45" (3/3) ... [2020-09-04 13:04:45,544 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2020-09-04 13:04:45,553 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:04:45,561 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:04:45,581 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:04:45,608 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:04:45,608 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:04:45,608 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:04:45,609 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:04:45,610 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:04:45,610 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:04:45,610 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:04:45,610 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:04:45,630 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-04 13:04:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-04 13:04:45,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:04:45,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:04:45,638 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:04:45,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:04:45,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times [2020-09-04 13:04:45,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:04:45,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424509456] [2020-09-04 13:04:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:04:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:45,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:04:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:45,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:04:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:04:45,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424509456] [2020-09-04 13:04:45,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:04:45,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 13:04:45,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495387319] [2020-09-04 13:04:45,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:04:45,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:04:46,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:04:46,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:04:46,007 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-09-04 13:04:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:04:46,180 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-09-04 13:04:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:04:46,182 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-09-04 13:04:46,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:04:46,195 INFO L225 Difference]: With dead ends: 36 [2020-09-04 13:04:46,196 INFO L226 Difference]: Without dead ends: 22 [2020-09-04 13:04:46,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:04:46,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-04 13:04:46,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-04 13:04:46,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-04 13:04:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-09-04 13:04:46,249 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-09-04 13:04:46,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:04:46,249 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-09-04 13:04:46,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:04:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-09-04 13:04:46,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 13:04:46,252 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:04:46,252 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] [2020-09-04 13:04:46,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:04:46,253 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:04:46,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:04:46,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times [2020-09-04 13:04:46,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:04:46,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190312479] [2020-09-04 13:04:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:04:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:46,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:04:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:46,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:04:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:46,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:04:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:46,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:04:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 13:04:46,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190312479] [2020-09-04 13:04:46,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921252616] [2020-09-04 13:04:46,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:04:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:46,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-04 13:04:46,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:04:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 13:04:46,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:04:46,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 14 [2020-09-04 13:04:46,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353473591] [2020-09-04 13:04:46,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 13:04:46,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:04:46,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 13:04:46,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:04:46,701 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 14 states. [2020-09-04 13:04:46,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:04:46,898 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2020-09-04 13:04:46,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:04:46,899 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-09-04 13:04:46,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:04:46,900 INFO L225 Difference]: With dead ends: 39 [2020-09-04 13:04:46,900 INFO L226 Difference]: Without dead ends: 24 [2020-09-04 13:04:46,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:04:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-04 13:04:46,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-04 13:04:46,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-04 13:04:46,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-09-04 13:04:46,910 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27 [2020-09-04 13:04:46,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:04:46,910 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-09-04 13:04:46,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 13:04:46,911 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-09-04 13:04:46,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 13:04:46,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:04:46,913 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] [2020-09-04 13:04:47,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 13:04:47,126 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:04:47,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:04:47,127 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times [2020-09-04 13:04:47,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:04:47,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054137469] [2020-09-04 13:04:47,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:04:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:47,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:04:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:47,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:04:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:47,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:04:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:47,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:04:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-04 13:04:47,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054137469] [2020-09-04 13:04:47,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665995925] [2020-09-04 13:04:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-09-04 13:04:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:47,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:04:47,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:04:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-04 13:04:47,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:04:47,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-09-04 13:04:47,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184490267] [2020-09-04 13:04:47,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 13:04:47,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:04:47,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 13:04:47,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-09-04 13:04:47,552 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 17 states. [2020-09-04 13:04:47,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:04:47,775 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2020-09-04 13:04:47,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:04:47,776 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-09-04 13:04:47,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:04:47,778 INFO L225 Difference]: With dead ends: 34 [2020-09-04 13:04:47,778 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 13:04:47,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2020-09-04 13:04:47,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 13:04:47,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-09-04 13:04:47,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-04 13:04:47,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2020-09-04 13:04:47,788 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28 [2020-09-04 13:04:47,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:04:47,789 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2020-09-04 13:04:47,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 13:04:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2020-09-04 13:04:47,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 13:04:47,791 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:04:47,791 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] [2020-09-04 13:04:48,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:04:48,004 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:04:48,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:04:48,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 2 times [2020-09-04 13:04:48,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:04:48,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348148883] [2020-09-04 13:04:48,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:04:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:48,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:04:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:48,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:04:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:48,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:04:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:48,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:04:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:48,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:04:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:48,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:04:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-04 13:04:48,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348148883] [2020-09-04 13:04:48,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695638838] [2020-09-04 13:04:48,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:04:48,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:04:48,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:04:48,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:04:48,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:04:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-04 13:04:48,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:04:48,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2020-09-04 13:04:48,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836565244] [2020-09-04 13:04:48,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:04:48,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:04:48,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:04:48,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:04:48,318 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 10 states. [2020-09-04 13:04:48,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:04:48,467 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions. [2020-09-04 13:04:48,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 13:04:48,468 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-09-04 13:04:48,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:04:48,470 INFO L225 Difference]: With dead ends: 56 [2020-09-04 13:04:48,470 INFO L226 Difference]: Without dead ends: 34 [2020-09-04 13:04:48,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:04:48,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-04 13:04:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-09-04 13:04:48,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-04 13:04:48,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2020-09-04 13:04:48,479 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 41 [2020-09-04 13:04:48,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:04:48,480 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2020-09-04 13:04:48,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:04:48,480 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2020-09-04 13:04:48,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-04 13:04:48,482 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:04:48,482 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] [2020-09-04 13:04:48,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:04:48,698 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:04:48,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:04:48,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 3 times [2020-09-04 13:04:48,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:04:48,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56948481] [2020-09-04 13:04:48,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:04:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:48,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:04:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:48,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:04:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:48,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:04:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:48,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:04:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:48,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-04 13:04:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:48,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 13:04:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:04:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-04 13:04:48,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56948481] [2020-09-04 13:04:48,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13516869] [2020-09-04 13:04:48,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-09-04 13:04:48,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-04 13:04:48,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:04:48,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-04 13:04:48,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:04:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-04 13:04:49,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:04:49,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2020-09-04 13:04:49,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553795536] [2020-09-04 13:04:49,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-04 13:04:49,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:04:49,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-04 13:04:49,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-09-04 13:04:49,151 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 21 states. [2020-09-04 13:04:49,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:04:49,648 INFO L93 Difference]: Finished difference Result 45 states and 67 transitions. [2020-09-04 13:04:49,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 13:04:49,649 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-09-04 13:04:49,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:04:49,649 INFO L225 Difference]: With dead ends: 45 [2020-09-04 13:04:49,649 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:04:49,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2020-09-04 13:04:49,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:04:49,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:04:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:04:49,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:04:49,655 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2020-09-04 13:04:49,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:04:49,655 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:04:49,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-04 13:04:49,655 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:04:49,655 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:04:49,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:04:49,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:04:50,045 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-09-04 13:04:50,045 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-09-04 13:04:50,046 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= fibonacci_~n |fibonacci_#in~n|) (<= 2 |fibonacci_#in~n|)) [2020-09-04 13:04:50,046 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-09-04 13:04:50,046 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= |fibonacci_#in~n| 2) (<= 1 |fibonacci_#t~ret0|) .cse0 (<= 2 |fibonacci_#in~n|)) (and (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 2)) (<= 3 fibonacci_~n) .cse0))) [2020-09-04 13:04:50,046 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-09-04 13:04:50,046 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-09-04 13:04:50,046 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-09-04 13:04:50,046 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-09-04 13:04:50,046 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 13:04:50,046 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:04:50,047 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:04:50,047 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:04:50,047 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:04:50,047 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:04:50,047 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2020-09-04 13:04:50,047 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2020-09-04 13:04:50,047 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2020-09-04 13:04:50,048 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true [2020-09-04 13:04:50,048 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-09-04 13:04:50,048 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-09-04 13:04:50,048 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed. [2020-09-04 13:04:50,048 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed. [2020-09-04 13:04:50,048 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-09-04 13:04:50,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:04:50 BoogieIcfgContainer [2020-09-04 13:04:50,054 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:04:50,057 INFO L168 Benchmark]: Toolchain (without parser) took 5221.40 ms. Allocated memory was 138.9 MB in the beginning and 249.0 MB in the end (delta: 110.1 MB). Free memory was 102.2 MB in the beginning and 198.1 MB in the end (delta: -95.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-09-04 13:04:50,057 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 13:04:50,058 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.96 ms. Allocated memory is still 138.9 MB. Free memory was 102.0 MB in the beginning and 92.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:04:50,059 INFO L168 Benchmark]: Boogie Preprocessor took 32.76 ms. Allocated memory is still 138.9 MB. Free memory was 92.6 MB in the beginning and 91.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:04:50,060 INFO L168 Benchmark]: RCFGBuilder took 349.49 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 91.2 MB in the beginning and 169.1 MB in the end (delta: -77.9 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:04:50,062 INFO L168 Benchmark]: TraceAbstraction took 4518.02 ms. Allocated memory was 201.9 MB in the beginning and 249.0 MB in the end (delta: 47.2 MB). Free memory was 168.5 MB in the beginning and 198.1 MB in the end (delta: -29.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:04:50,066 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 315.96 ms. Allocated memory is still 138.9 MB. Free memory was 102.0 MB in the beginning and 92.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.76 ms. Allocated memory is still 138.9 MB. Free memory was 92.6 MB in the beginning and 91.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 349.49 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 91.2 MB in the beginning and 169.1 MB in the end (delta: -77.9 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4518.02 ms. Allocated memory was 201.9 MB in the beginning and 249.0 MB in the end (delta: 47.2 MB). Free memory was 168.5 MB in the beginning and 198.1 MB in the end (delta: -29.6 MB). Peak memory consumption was 17.6 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: 4.2s, OverallIterations: 5, TraceHistogramMax: 5, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 88 SDtfs, 73 SDslu, 400 SDs, 0 SdLazy, 596 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 246 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.2s 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, 113 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 290 NumberOfCodeBlocks, 282 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 281 ConstructedInterpolants, 0 QuantifiedInterpolants, 24318 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...