/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-simple/id_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:21:13,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:21:13,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:21:13,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:21:13,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:21:13,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:21:13,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:21:13,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:21:13,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:21:13,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:21:13,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:21:13,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:21:13,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:21:13,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:21:13,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:21:13,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:21:13,396 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:21:13,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:21:13,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:21:13,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:21:13,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:21:13,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:21:13,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:21:13,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:21:13,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:21:13,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:21:13,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:21:13,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:21:13,431 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 13:21:13,488 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:21:13,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:21:13,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:21:13,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:21:13,494 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:21:13,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:21:13,495 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:21:13,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:21:13,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:21:13,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:21:13,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:21:13,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:21:13,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:21:13,496 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:21:13,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:21:13,496 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:21:13,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:21:13,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:21:13,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:21:13,498 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:21:13,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:21:13,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:21:13,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:21:13,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:21:13,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:21:13,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:21:13,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:21:13,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:21:13,500 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:21:13,500 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:21:13,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:21:14,005 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:21:14,009 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:21:14,010 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:21:14,011 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:21:14,012 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-09-04 13:21:14,102 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d5dd7e82/82e5044d636c4df686639de67c4fc176/FLAGa8b2917c0 [2020-09-04 13:21:14,664 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:21:14,665 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-09-04 13:21:14,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d5dd7e82/82e5044d636c4df686639de67c4fc176/FLAGa8b2917c0 [2020-09-04 13:21:15,044 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d5dd7e82/82e5044d636c4df686639de67c4fc176 [2020-09-04 13:21:15,061 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:21:15,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:21:15,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:21:15,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:21:15,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:21:15,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:21:15" (1/1) ... [2020-09-04 13:21:15,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45d903d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:15, skipping insertion in model container [2020-09-04 13:21:15,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:21:15" (1/1) ... [2020-09-04 13:21:15,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:21:15,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:21:15,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:21:15,323 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:21:15,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:21:15,363 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:21:15,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:15 WrapperNode [2020-09-04 13:21:15,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:21:15,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:21:15,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:21:15,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:21:15,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:15" (1/1) ... [2020-09-04 13:21:15,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:15" (1/1) ... [2020-09-04 13:21:15,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:15" (1/1) ... [2020-09-04 13:21:15,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:15" (1/1) ... [2020-09-04 13:21:15,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:15" (1/1) ... [2020-09-04 13:21:15,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:15" (1/1) ... [2020-09-04 13:21:15,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:15" (1/1) ... [2020-09-04 13:21:15,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:21:15,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:21:15,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:21:15,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:21:15,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:15" (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 13:21:15,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:21:15,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:21:15,565 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-04 13:21:15,565 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:21:15,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-04 13:21:15,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:21:15,565 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-04 13:21:15,565 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:21:15,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:21:15,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:21:15,774 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:21:15,774 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:21:15,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:21:15 BoogieIcfgContainer [2020-09-04 13:21:15,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:21:15,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:21:15,781 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:21:15,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:21:15,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:21:15" (1/3) ... [2020-09-04 13:21:15,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5097328d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:21:15, skipping insertion in model container [2020-09-04 13:21:15,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:15" (2/3) ... [2020-09-04 13:21:15,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5097328d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:21:15, skipping insertion in model container [2020-09-04 13:21:15,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:21:15" (3/3) ... [2020-09-04 13:21:15,790 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b2_o3.c [2020-09-04 13:21:15,802 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:21:15,812 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:21:15,835 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:21:15,865 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:21:15,865 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:21:15,866 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:21:15,866 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:21:15,866 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:21:15,866 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:21:15,866 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:21:15,866 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:21:15,887 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-09-04 13:21:15,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:21:15,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:15,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:15,896 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:15,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:15,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1250208381, now seen corresponding path program 1 times [2020-09-04 13:21:15,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:15,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643229250] [2020-09-04 13:21:15,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,215 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 13:21:16,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643229250] [2020-09-04 13:21:16,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:21:16,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:21:16,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064117997] [2020-09-04 13:21:16,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:21:16,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:16,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:21:16,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:21:16,265 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-09-04 13:21:16,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:16,348 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-09-04 13:21:16,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:21:16,350 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-04 13:21:16,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:16,368 INFO L225 Difference]: With dead ends: 33 [2020-09-04 13:21:16,368 INFO L226 Difference]: Without dead ends: 19 [2020-09-04 13:21:16,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:21:16,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-04 13:21:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-09-04 13:21:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-04 13:21:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-09-04 13:21:16,431 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-09-04 13:21:16,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:16,431 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-09-04 13:21:16,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:21:16,432 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-09-04 13:21:16,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-04 13:21:16,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:16,434 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:16,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:21:16,435 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:16,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:16,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1951994857, now seen corresponding path program 1 times [2020-09-04 13:21:16,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:16,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295127153] [2020-09-04 13:21:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:21:16,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295127153] [2020-09-04 13:21:16,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:21:16,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:21:16,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986459619] [2020-09-04 13:21:16,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:21:16,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:16,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:21:16,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:21:16,613 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-09-04 13:21:16,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:16,639 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-09-04 13:21:16,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:21:16,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-09-04 13:21:16,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:16,641 INFO L225 Difference]: With dead ends: 25 [2020-09-04 13:21:16,641 INFO L226 Difference]: Without dead ends: 21 [2020-09-04 13:21:16,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:21:16,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-04 13:21:16,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-09-04 13:21:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-04 13:21:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-09-04 13:21:16,649 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 20 [2020-09-04 13:21:16,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:16,650 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-09-04 13:21:16,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:21:16,650 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-09-04 13:21:16,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-04 13:21:16,651 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:16,651 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:16,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:21:16,652 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:16,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:16,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1923365706, now seen corresponding path program 1 times [2020-09-04 13:21:16,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:16,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273159929] [2020-09-04 13:21:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:21:16,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273159929] [2020-09-04 13:21:16,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42314606] [2020-09-04 13:21:16,927 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 13:21:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-04 13:21:17,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:21:17,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:17,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-04 13:21:17,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342694055] [2020-09-04 13:21:17,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:21:17,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:17,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:21:17,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:21:17,135 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 9 states. [2020-09-04 13:21:17,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:17,201 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-09-04 13:21:17,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 13:21:17,202 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-09-04 13:21:17,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:17,203 INFO L225 Difference]: With dead ends: 37 [2020-09-04 13:21:17,204 INFO L226 Difference]: Without dead ends: 25 [2020-09-04 13:21:17,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:21:17,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-04 13:21:17,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-09-04 13:21:17,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-04 13:21:17,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-09-04 13:21:17,212 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-09-04 13:21:17,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:17,212 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-09-04 13:21:17,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:21:17,213 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-09-04 13:21:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 13:21:17,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:17,214 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:17,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-09-04 13:21:17,430 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:17,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:17,430 INFO L82 PathProgramCache]: Analyzing trace with hash 405472645, now seen corresponding path program 2 times [2020-09-04 13:21:17,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:17,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565146803] [2020-09-04 13:21:17,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:17,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:17,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:17,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:17,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 13:21:17,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565146803] [2020-09-04 13:21:17,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338491179] [2020-09-04 13:21:17,769 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 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 [2020-09-04 13:21:17,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:21:17,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:17,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-04 13:21:17,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 13:21:17,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:17,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-04 13:21:17,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600861844] [2020-09-04 13:21:17,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 13:21:17,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:17,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 13:21:17,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:21:17,872 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 12 states. [2020-09-04 13:21:17,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:17,967 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-09-04 13:21:17,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 13:21:17,967 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-09-04 13:21:17,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:17,969 INFO L225 Difference]: With dead ends: 41 [2020-09-04 13:21:17,969 INFO L226 Difference]: Without dead ends: 29 [2020-09-04 13:21:17,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:21:17,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-04 13:21:17,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-09-04 13:21:17,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 13:21:17,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-09-04 13:21:17,977 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 27 [2020-09-04 13:21:17,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:17,977 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-09-04 13:21:17,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 13:21:17,978 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-09-04 13:21:17,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 13:21:17,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:17,979 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:18,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:18,194 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:18,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:18,194 INFO L82 PathProgramCache]: Analyzing trace with hash -617031938, now seen corresponding path program 3 times [2020-09-04 13:21:18,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:18,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100925785] [2020-09-04 13:21:18,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:18,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:18,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:18,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:18,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:18,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-04 13:21:18,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100925785] [2020-09-04 13:21:18,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454222772] [2020-09-04 13:21:18,426 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-09-04 13:21:18,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-04 13:21:18,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:18,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-04 13:21:18,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-09-04 13:21:18,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:21:18,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2020-09-04 13:21:18,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429235379] [2020-09-04 13:21:18,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:21:18,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:18,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:21:18,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:21:18,535 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2020-09-04 13:21:18,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:18,545 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-09-04 13:21:18,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:21:18,546 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-09-04 13:21:18,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:18,547 INFO L225 Difference]: With dead ends: 27 [2020-09-04 13:21:18,547 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:21:18,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:21:18,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:21:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:21:18,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:21:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:21:18,549 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-09-04 13:21:18,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:18,550 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:21:18,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:21:18,550 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:21:18,550 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:21:18,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:18,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:21:18,785 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 13:21:18,785 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:21:18,785 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:21:18,786 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:21:18,786 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:21:18,786 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:21:18,786 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2020-09-04 13:21:18,786 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-09-04 13:21:18,786 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-09-04 13:21:18,787 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-04 13:21:18,787 INFO L268 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-09-04 13:21:18,787 INFO L271 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: true [2020-09-04 13:21:18,787 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-09-04 13:21:18,787 INFO L268 CegarLoopResult]: For program point L14-2(lines 11 17) no Hoare annotation was computed. [2020-09-04 13:21:18,787 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 9) no Hoare annotation was computed. [2020-09-04 13:21:18,788 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 9) no Hoare annotation was computed. [2020-09-04 13:21:18,788 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2020-09-04 13:21:18,788 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-09-04 13:21:18,788 INFO L271 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: true [2020-09-04 13:21:18,788 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-04 13:21:18,788 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-09-04 13:21:18,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:21:18 BoogieIcfgContainer [2020-09-04 13:21:18,796 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:21:18,800 INFO L168 Benchmark]: Toolchain (without parser) took 3735.70 ms. Allocated memory was 140.0 MB in the beginning and 234.9 MB in the end (delta: 94.9 MB). Free memory was 101.5 MB in the beginning and 108.9 MB in the end (delta: -7.3 MB). Peak memory consumption was 87.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:21:18,801 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:21:18,802 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.11 ms. Allocated memory is still 140.0 MB. Free memory was 101.3 MB in the beginning and 92.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-04 13:21:18,803 INFO L168 Benchmark]: Boogie Preprocessor took 35.92 ms. Allocated memory is still 140.0 MB. Free memory was 92.1 MB in the beginning and 90.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:21:18,804 INFO L168 Benchmark]: RCFGBuilder took 377.35 ms. Allocated memory was 140.0 MB in the beginning and 200.8 MB in the end (delta: 60.8 MB). Free memory was 90.8 MB in the beginning and 169.2 MB in the end (delta: -78.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:21:18,804 INFO L168 Benchmark]: TraceAbstraction took 3015.96 ms. Allocated memory was 200.8 MB in the beginning and 234.9 MB in the end (delta: 34.1 MB). Free memory was 168.5 MB in the beginning and 108.9 MB in the end (delta: 59.6 MB). Peak memory consumption was 93.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:21:18,808 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 300.11 ms. Allocated memory is still 140.0 MB. Free memory was 101.3 MB in the beginning and 92.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.92 ms. Allocated memory is still 140.0 MB. Free memory was 92.1 MB in the beginning and 90.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 377.35 ms. Allocated memory was 140.0 MB in the beginning and 200.8 MB in the end (delta: 60.8 MB). Free memory was 90.8 MB in the beginning and 169.2 MB in the end (delta: -78.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3015.96 ms. Allocated memory was 200.8 MB in the beginning and 234.9 MB in the end (delta: 34.1 MB). Free memory was 168.5 MB in the beginning and 108.9 MB in the end (delta: 59.6 MB). Peak memory consumption was 93.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: 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, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.8s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 95 SDtfs, 8 SDslu, 432 SDs, 0 SdLazy, 107 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 195 NumberOfCodeBlocks, 181 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 187 ConstructedInterpolants, 0 QuantifiedInterpolants, 14343 SizeOfPredicates, 7 NumberOfNonLiveVariables, 150 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 76/108 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...