/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 19:29:13,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 19:29:13,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 19:29:13,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 19:29:13,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 19:29:13,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 19:29:13,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 19:29:13,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 19:29:13,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 19:29:13,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 19:29:13,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 19:29:13,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 19:29:13,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 19:29:13,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 19:29:13,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 19:29:13,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 19:29:13,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 19:29:13,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 19:29:13,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 19:29:13,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 19:29:13,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 19:29:13,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 19:29:13,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 19:29:13,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 19:29:13,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 19:29:13,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 19:29:13,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 19:29:13,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 19:29:13,365 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 19:29:13,405 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 19:29:13,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 19:29:13,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 19:29:13,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 19:29:13,408 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 19:29:13,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 19:29:13,409 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 19:29:13,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 19:29:13,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 19:29:13,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 19:29:13,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 19:29:13,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 19:29:13,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 19:29:13,412 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 19:29:13,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 19:29:13,412 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 19:29:13,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 19:29:13,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 19:29:13,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 19:29:13,414 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 19:29:13,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 19:29:13,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:29:13,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 19:29:13,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 19:29:13,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 19:29:13,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 19:29:13,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 19:29:13,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 19:29:13,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 19:29:13,416 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 19:29:13,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 19:29:13,733 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 19:29:13,736 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 19:29:13,738 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 19:29:13,738 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 19:29:13,739 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-08-18 19:29:13,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7867c802/db296d435c3042c0b81eb85dfbf764cb/FLAG513c09a3b [2020-08-18 19:29:14,282 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 19:29:14,283 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-08-18 19:29:14,290 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7867c802/db296d435c3042c0b81eb85dfbf764cb/FLAG513c09a3b [2020-08-18 19:29:14,663 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7867c802/db296d435c3042c0b81eb85dfbf764cb [2020-08-18 19:29:14,672 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 19:29:14,673 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 19:29:14,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 19:29:14,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 19:29:14,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 19:29:14,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:29:14" (1/1) ... [2020-08-18 19:29:14,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37d4521a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:14, skipping insertion in model container [2020-08-18 19:29:14,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:29:14" (1/1) ... [2020-08-18 19:29:14,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 19:29:14,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 19:29:14,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:29:14,883 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 19:29:14,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:29:14,911 INFO L208 MainTranslator]: Completed translation [2020-08-18 19:29:14,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:14 WrapperNode [2020-08-18 19:29:14,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 19:29:14,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 19:29:14,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 19:29:14,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 19:29:14,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:14" (1/1) ... [2020-08-18 19:29:14,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:14" (1/1) ... [2020-08-18 19:29:14,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:14" (1/1) ... [2020-08-18 19:29:14,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:14" (1/1) ... [2020-08-18 19:29:15,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:14" (1/1) ... [2020-08-18 19:29:15,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:14" (1/1) ... [2020-08-18 19:29:15,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:14" (1/1) ... [2020-08-18 19:29:15,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 19:29:15,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 19:29:15,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 19:29:15,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 19:29:15,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:29:15,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 19:29:15,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 19:29:15,077 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 19:29:15,077 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-18 19:29:15,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 19:29:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 19:29:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 19:29:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 19:29:15,078 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-18 19:29:15,078 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 19:29:15,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 19:29:15,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 19:29:15,274 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 19:29:15,274 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 19:29:15,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:29:15 BoogieIcfgContainer [2020-08-18 19:29:15,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 19:29:15,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 19:29:15,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 19:29:15,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 19:29:15,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:29:14" (1/3) ... [2020-08-18 19:29:15,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e25b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:29:15, skipping insertion in model container [2020-08-18 19:29:15,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:29:14" (2/3) ... [2020-08-18 19:29:15,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e25b4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:29:15, skipping insertion in model container [2020-08-18 19:29:15,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:29:15" (3/3) ... [2020-08-18 19:29:15,288 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-08-18 19:29:15,301 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 19:29:15,312 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 19:29:15,334 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 19:29:15,362 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 19:29:15,363 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 19:29:15,363 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 19:29:15,363 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 19:29:15,363 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 19:29:15,363 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 19:29:15,364 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 19:29:15,364 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 19:29:15,385 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-18 19:29:15,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 19:29:15,392 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:15,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:15,393 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:15,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:15,400 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-18 19:29:15,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:15,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112700537] [2020-08-18 19:29:15,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:15,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:15,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:29:15,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112700537] [2020-08-18 19:29:15,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:29:15,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 19:29:15,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032531605] [2020-08-18 19:29:15,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 19:29:15,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:15,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 19:29:15,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 19:29:15,716 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-18 19:29:15,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:15,766 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-18 19:29:15,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 19:29:15,767 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 19:29:15,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:15,776 INFO L225 Difference]: With dead ends: 40 [2020-08-18 19:29:15,777 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 19:29:15,780 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 [2020-08-18 19:29:15,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 19:29:15,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-18 19:29:15,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 19:29:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 19:29:15,820 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-18 19:29:15,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:15,821 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 19:29:15,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 19:29:15,821 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 19:29:15,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 19:29:15,823 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:15,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:15,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 19:29:15,824 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:15,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:15,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-18 19:29:15,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:15,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447267649] [2020-08-18 19:29:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:15,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:15,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:15,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:29:15,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447267649] [2020-08-18 19:29:15,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:29:15,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 19:29:15,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356029619] [2020-08-18 19:29:15,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 19:29:15,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:15,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 19:29:15,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 19:29:15,996 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-18 19:29:16,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:16,018 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-18 19:29:16,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 19:29:16,019 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 19:29:16,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:16,020 INFO L225 Difference]: With dead ends: 32 [2020-08-18 19:29:16,021 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 19:29:16,022 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 [2020-08-18 19:29:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 19:29:16,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-18 19:29:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 19:29:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 19:29:16,029 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-18 19:29:16,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:16,030 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 19:29:16,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 19:29:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 19:29:16,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 19:29:16,031 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:16,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:16,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 19:29:16,032 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:16,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-18 19:29:16,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:16,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774682099] [2020-08-18 19:29:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:16,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:16,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:16,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 19:29:16,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774682099] [2020-08-18 19:29:16,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:29:16,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 19:29:16,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283389321] [2020-08-18 19:29:16,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 19:29:16,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:16,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 19:29:16,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 19:29:16,228 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-18 19:29:16,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:16,293 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-18 19:29:16,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 19:29:16,294 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-18 19:29:16,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:16,296 INFO L225 Difference]: With dead ends: 48 [2020-08-18 19:29:16,296 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 19:29:16,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 19:29:16,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 19:29:16,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 19:29:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 19:29:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-18 19:29:16,305 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-18 19:29:16,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:16,306 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-18 19:29:16,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 19:29:16,306 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-18 19:29:16,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 19:29:16,308 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:16,308 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:16,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 19:29:16,309 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:16,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:16,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-18 19:29:16,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:16,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693374060] [2020-08-18 19:29:16,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:16,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:29:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:16,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 19:29:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:16,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:16,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 19:29:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:29:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 19:29:16,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693374060] [2020-08-18 19:29:16,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:29:16,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 19:29:16,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705620633] [2020-08-18 19:29:16,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 19:29:16,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:29:16,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 19:29:16,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 19:29:16,450 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-18 19:29:16,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:29:16,485 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-18 19:29:16,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 19:29:16,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-18 19:29:16,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:29:16,489 INFO L225 Difference]: With dead ends: 50 [2020-08-18 19:29:16,489 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 19:29:16,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 19:29:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 19:29:16,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-18 19:29:16,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 19:29:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-18 19:29:16,509 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-18 19:29:16,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:29:16,511 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-18 19:29:16,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 19:29:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-18 19:29:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 19:29:16,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:29:16,513 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 19:29:16,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 19:29:16,515 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:29:16,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:29:16,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-18 19:29:16,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:29:16,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374717604] [2020-08-18 19:29:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:29:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 19:29:16,556 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 19:29:16,561 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 19:29:16,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 19:29:16,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 07:29:16 BoogieIcfgContainer [2020-08-18 19:29:16,605 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 19:29:16,609 INFO L168 Benchmark]: Toolchain (without parser) took 1934.14 ms. Allocated memory was 141.0 MB in the beginning and 235.4 MB in the end (delta: 94.4 MB). Free memory was 104.2 MB in the beginning and 200.5 MB in the end (delta: -96.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 19:29:16,610 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 19:29:16,613 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.21 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 94.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-18 19:29:16,615 INFO L168 Benchmark]: Boogie Preprocessor took 101.61 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 94.0 MB in the beginning and 183.1 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 19:29:16,622 INFO L168 Benchmark]: RCFGBuilder took 264.98 ms. Allocated memory is still 203.9 MB. Free memory was 183.1 MB in the beginning and 170.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 19:29:16,623 INFO L168 Benchmark]: TraceAbstraction took 1324.38 ms. Allocated memory was 203.9 MB in the beginning and 235.4 MB in the end (delta: 31.5 MB). Free memory was 169.5 MB in the beginning and 200.5 MB in the end (delta: -31.1 MB). Peak memory consumption was 394.2 kB. Max. memory is 7.1 GB. [2020-08-18 19:29:16,635 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 238.21 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 94.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 101.61 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 94.0 MB in the beginning and 183.1 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 264.98 ms. Allocated memory is still 203.9 MB. Free memory was 183.1 MB in the beginning and 170.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1324.38 ms. Allocated memory was 203.9 MB in the beginning and 235.4 MB in the end (delta: 31.5 MB). Free memory was 169.5 MB in the beginning and 200.5 MB in the end (delta: -31.1 MB). Peak memory consumption was 394.2 kB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 25]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] unsigned int input = __VERIFIER_nondet_uint(); [L23] CALL, EXPR id(input) [L8] COND FALSE !(x==0) [L9] CALL, EXPR id2(x-1) [L15] COND FALSE !(x==0) [L16] CALL, EXPR id(x-1) [L8] COND TRUE x==0 [L8] return 0; [L16] RET, EXPR id(x-1) [L16] unsigned int ret = id(x-1) + 1; [L17] COND FALSE !(ret > 3) [L18] return ret; [L9] RET, EXPR id2(x-1) [L9] unsigned int ret = id2(x-1) + 1; [L10] COND FALSE !(ret > 3) [L11] return ret; [L23] RET, EXPR id(input) [L23] unsigned int result = id(input); [L24] COND TRUE result == 2 [L25] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 117 SDtfs, 6 SDslu, 405 SDs, 0 SdLazy, 57 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred 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, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 4036 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...