/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=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/id_build.i.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:01:06,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:01:06,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:01:06,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:01:06,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:01:06,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:01:06,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:01:06,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:01:06,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:01:06,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:01:06,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:01:06,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:01:06,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:01:06,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:01:06,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:01:06,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:01:06,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:01:06,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:01:06,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:01:06,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:01:06,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:01:06,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:01:06,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:01:06,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:01:06,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:01:06,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:01:06,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:01:06,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:01:06,570 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 18:01:06,613 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:01:06,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:01:06,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:01:06,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:01:06,616 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:01:06,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:01:06,616 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:01:06,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:01:06,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:01:06,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:01:06,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:01:06,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:01:06,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:01:06,619 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:01:06,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:01:06,619 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:01:06,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:01:06,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:01:06,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:01:06,620 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:01:06,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:01:06,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:01:06,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:01:06,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:01:06,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:01:06,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:01:06,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:01:06,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:01:06,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:01:06,622 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=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 18:01:06,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:01:06,909 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:01:06,912 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:01:06,914 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:01:06,914 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:01:06,915 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_build.i.v+lhb-reducer.c [2020-08-18 18:01:06,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2948cf83c/ade007bb2dde46d288d30ae89a471701/FLAG5a8fb6909 [2020-08-18 18:01:07,358 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:01:07,359 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/id_build.i.v+lhb-reducer.c [2020-08-18 18:01:07,366 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2948cf83c/ade007bb2dde46d288d30ae89a471701/FLAG5a8fb6909 [2020-08-18 18:01:07,757 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2948cf83c/ade007bb2dde46d288d30ae89a471701 [2020-08-18 18:01:07,768 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:01:07,770 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:01:07,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:01:07,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:01:07,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:01:07,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:01:07" (1/1) ... [2020-08-18 18:01:07,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b861da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:07, skipping insertion in model container [2020-08-18 18:01:07,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:01:07" (1/1) ... [2020-08-18 18:01:07,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:01:07,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:01:07,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:01:08,001 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:01:08,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:01:08,037 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:01:08,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:08 WrapperNode [2020-08-18 18:01:08,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:01:08,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:01:08,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:01:08,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:01:08,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:08" (1/1) ... [2020-08-18 18:01:08,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:08" (1/1) ... [2020-08-18 18:01:08,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:08" (1/1) ... [2020-08-18 18:01:08,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:08" (1/1) ... [2020-08-18 18:01:08,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:08" (1/1) ... [2020-08-18 18:01:08,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:08" (1/1) ... [2020-08-18 18:01:08,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:08" (1/1) ... [2020-08-18 18:01:08,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:01:08,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:01:08,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:01:08,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:01:08,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:08" (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 18:01:08,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:01:08,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:01:08,218 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 18:01:08,218 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:01:08,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:01:08,218 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 18:01:08,218 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 18:01:08,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 18:01:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:01:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:01:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:01:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:01:08,432 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:01:08,432 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 18:01:08,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:01:08 BoogieIcfgContainer [2020-08-18 18:01:08,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:01:08,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:01:08,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:01:08,441 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:01:08,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:01:07" (1/3) ... [2020-08-18 18:01:08,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e7c4be9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:01:08, skipping insertion in model container [2020-08-18 18:01:08,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:01:08" (2/3) ... [2020-08-18 18:01:08,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e7c4be9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:01:08, skipping insertion in model container [2020-08-18 18:01:08,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:01:08" (3/3) ... [2020-08-18 18:01:08,444 INFO L109 eAbstractionObserver]: Analyzing ICFG id_build.i.v+lhb-reducer.c [2020-08-18 18:01:08,456 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:01:08,464 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-08-18 18:01:08,486 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-08-18 18:01:08,541 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:01:08,542 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:01:08,542 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:01:08,542 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:01:08,542 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:01:08,542 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:01:08,543 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:01:08,545 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:01:08,580 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-18 18:01:08,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 18:01:08,586 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:01:08,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:01:08,587 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:01:08,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:01:08,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1747837512, now seen corresponding path program 1 times [2020-08-18 18:01:08,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:01:08,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600623802] [2020-08-18 18:01:08,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:01:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:08,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:01:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:08,792 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 18:01:08,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600623802] [2020-08-18 18:01:08,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:01:08,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:01:08,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212655694] [2020-08-18 18:01:08,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:01:08,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:01:08,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:01:08,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:01:08,817 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-08-18 18:01:08,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:01:08,967 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-08-18 18:01:08,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 18:01:08,969 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-18 18:01:08,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:01:08,979 INFO L225 Difference]: With dead ends: 30 [2020-08-18 18:01:08,979 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 18:01:08,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:01:09,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 18:01:09,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 18:01:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 18:01:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-18 18:01:09,024 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-08-18 18:01:09,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:01:09,024 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-18 18:01:09,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:01:09,025 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-18 18:01:09,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-18 18:01:09,026 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:01:09,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:01:09,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:01:09,027 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:01:09,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:01:09,028 INFO L82 PathProgramCache]: Analyzing trace with hash -339542086, now seen corresponding path program 1 times [2020-08-18 18:01:09,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:01:09,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952991325] [2020-08-18 18:01:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:01:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:09,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:01:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:09,135 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 18:01:09,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952991325] [2020-08-18 18:01:09,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:01:09,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:01:09,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034764371] [2020-08-18 18:01:09,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:01:09,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:01:09,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:01:09,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:01:09,143 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2020-08-18 18:01:09,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:01:09,247 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-08-18 18:01:09,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:01:09,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-08-18 18:01:09,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:01:09,249 INFO L225 Difference]: With dead ends: 19 [2020-08-18 18:01:09,249 INFO L226 Difference]: Without dead ends: 17 [2020-08-18 18:01:09,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:01:09,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-18 18:01:09,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-08-18 18:01:09,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-18 18:01:09,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-08-18 18:01:09,257 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2020-08-18 18:01:09,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:01:09,257 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-08-18 18:01:09,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:01:09,258 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-08-18 18:01:09,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 18:01:09,259 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:01:09,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:01:09,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:01:09,260 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:01:09,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:01:09,260 INFO L82 PathProgramCache]: Analyzing trace with hash 117666302, now seen corresponding path program 1 times [2020-08-18 18:01:09,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:01:09,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105941629] [2020-08-18 18:01:09,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:01:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:09,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:01:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:01:09,346 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 18:01:09,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105941629] [2020-08-18 18:01:09,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:01:09,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 18:01:09,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436692444] [2020-08-18 18:01:09,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:01:09,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:01:09,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:01:09,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:01:09,349 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-08-18 18:01:09,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:01:09,554 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2020-08-18 18:01:09,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:01:09,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-18 18:01:09,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:01:09,555 INFO L225 Difference]: With dead ends: 25 [2020-08-18 18:01:09,555 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 18:01:09,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:01:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 18:01:09,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 18:01:09,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 18:01:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 18:01:09,557 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-08-18 18:01:09,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:01:09,558 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 18:01:09,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:01:09,558 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 18:01:09,558 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 18:01:09,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:01:09,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 18:01:09,738 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:01:09,739 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__return_100~0 |old(~__return_100~0)|) (= ~__return_main~0 |old(~__return_main~0)|)) [2020-08-18 18:01:09,739 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:01:09,739 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:01:09,739 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 18:01:09,739 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 18:01:09,739 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:01:09,740 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-08-18 18:01:09,740 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-18 18:01:09,740 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-08-18 18:01:09,740 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-08-18 18:01:09,740 INFO L268 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-08-18 18:01:09,740 INFO L268 CegarLoopResult]: For program point mainErr1ASSERT_VIOLATIONERROR_FUNCTION(line 46) no Hoare annotation was computed. [2020-08-18 18:01:09,741 INFO L268 CegarLoopResult]: For program point L31(lines 31 87) no Hoare annotation was computed. [2020-08-18 18:01:09,741 INFO L268 CegarLoopResult]: For program point L62(line 62) no Hoare annotation was computed. [2020-08-18 18:01:09,741 INFO L264 CegarLoopResult]: At program point L93(lines 12 100) the Hoare annotation is: (and (= |old(~__return_100~0)| ~__return_100~0) (< 0 (+ main_~main__i~0 1))) [2020-08-18 18:01:09,741 INFO L268 CegarLoopResult]: For program point L60(lines 60 68) no Hoare annotation was computed. [2020-08-18 18:01:09,741 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 100) no Hoare annotation was computed. [2020-08-18 18:01:09,742 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-08-18 18:01:09,742 INFO L264 CegarLoopResult]: At program point L77(lines 50 85) the Hoare annotation is: (and (= |old(~__return_100~0)| ~__return_100~0) (not (= main_~__VERIFIER_assert__cond~0 0)) (< 0 (+ main_~main__i~0 1)) (< main_~main__i~0 main_~main__nlen~0) (not (= main_~__VERIFIER_assert__cond~1 0))) [2020-08-18 18:01:09,742 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 100) no Hoare annotation was computed. [2020-08-18 18:01:09,742 INFO L268 CegarLoopResult]: For program point L44(lines 44 85) no Hoare annotation was computed. [2020-08-18 18:01:09,742 INFO L264 CegarLoopResult]: At program point L67(lines 37 87) the Hoare annotation is: (let ((.cse0 (= |old(~__return_100~0)| ~__return_100~0)) (.cse1 (< 0 (+ main_~main__i~0 1))) (.cse2 (< main_~main__i~0 main_~main__nlen~0))) (or (and .cse0 .cse1 .cse2 (= main_~__VERIFIER_assert__cond~0 1)) (and .cse0 (not (= main_~__VERIFIER_assert__cond~2 0)) (not (= main_~__VERIFIER_assert__cond~0 0)) .cse1 .cse2))) [2020-08-18 18:01:09,743 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 33) no Hoare annotation was computed. [2020-08-18 18:01:09,743 INFO L268 CegarLoopResult]: For program point mainErr2ASSERT_VIOLATIONERROR_FUNCTION(line 62) no Hoare annotation was computed. [2020-08-18 18:01:09,743 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 11 100) the Hoare annotation is: (= |old(~__return_100~0)| ~__return_100~0) [2020-08-18 18:01:09,743 INFO L268 CegarLoopResult]: For program point L24(lines 24 94) no Hoare annotation was computed. [2020-08-18 18:01:09,743 INFO L268 CegarLoopResult]: For program point L74(lines 74 83) no Hoare annotation was computed. [2020-08-18 18:01:09,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:01:09 BoogieIcfgContainer [2020-08-18 18:01:09,765 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:01:09,768 INFO L168 Benchmark]: Toolchain (without parser) took 1997.29 ms. Allocated memory was 141.6 MB in the beginning and 232.8 MB in the end (delta: 91.2 MB). Free memory was 104.6 MB in the beginning and 178.0 MB in the end (delta: -73.3 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2020-08-18 18:01:09,770 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 18:01:09,770 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.61 ms. Allocated memory is still 141.6 MB. Free memory was 104.4 MB in the beginning and 94.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-18 18:01:09,771 INFO L168 Benchmark]: Boogie Preprocessor took 30.40 ms. Allocated memory is still 141.6 MB. Free memory was 94.4 MB in the beginning and 93.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-18 18:01:09,773 INFO L168 Benchmark]: RCFGBuilder took 367.36 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 93.0 MB in the beginning and 170.2 MB in the end (delta: -77.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-18 18:01:09,774 INFO L168 Benchmark]: TraceAbstraction took 1327.65 ms. Allocated memory was 205.0 MB in the beginning and 232.8 MB in the end (delta: 27.8 MB). Free memory was 169.5 MB in the beginning and 178.0 MB in the end (delta: -8.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2020-08-18 18:01:09,778 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 264.61 ms. Allocated memory is still 141.6 MB. Free memory was 104.4 MB in the beginning and 94.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.40 ms. Allocated memory is still 141.6 MB. Free memory was 94.4 MB in the beginning and 93.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 367.36 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 93.0 MB in the beginning and 170.2 MB in the end (delta: -77.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1327.65 ms. Allocated memory was 205.0 MB in the beginning and 232.8 MB in the end (delta: 27.8 MB). Free memory was 169.5 MB in the beginning and 178.0 MB in the end (delta: -8.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 33]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 62]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 46]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: \old(__return_100) == __return_100 && 0 < main__i + 1 - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: (((\old(__return_100) == __return_100 && !(__VERIFIER_assert__cond == 0)) && 0 < main__i + 1) && main__i < main__nlen) && !(__VERIFIER_assert__cond == 0) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (((\old(__return_100) == __return_100 && 0 < main__i + 1) && main__i < main__nlen) && __VERIFIER_assert__cond == 1) || ((((\old(__return_100) == __return_100 && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && 0 < main__i + 1) && main__i < main__nlen) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 41 SDtfs, 91 SDslu, 50 SDs, 0 SdLazy, 73 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, 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, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 12 NumberOfFragments, 77 HoareAnnotationTreeSize, 7 FomulaSimplifications, 198 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 66 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 1252 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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...