/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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_non_eq-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:07:13,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:07:13,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:07:13,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:07:13,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:07:13,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:07:13,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:07:13,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:07:13,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:07:13,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:07:13,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:07:13,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:07:13,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:07:13,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:07:13,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:07:13,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:07:13,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:07:13,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:07:13,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:07:13,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:07:13,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:07:13,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:07:13,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:07:13,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:07:13,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:07:13,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:07:13,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:07:13,199 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:07:13,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:07:13,200 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 14:07:13,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:07:13,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:07:13,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:07:13,206 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 [2020-08-21 14:07:13,229 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:07:13,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:07:13,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:07:13,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:07:13,231 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:07:13,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:07:13,231 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:07:13,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:07:13,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:07:13,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:07:13,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:07:13,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:07:13,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:07:13,233 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:07:13,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:07:13,233 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:07:13,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:07:13,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:07:13,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:07:13,234 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:07:13,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:07:13,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:07:13,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:07:13,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:07:13,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:07:13,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:07:13,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:07:13,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:07:13,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:07:13,236 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 -> log-additional-information=true; [2020-08-21 14:07:13,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:07:13,560 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:07:13,565 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:07:13,568 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:07:13,568 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:07:13,570 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_non_eq-2.c [2020-08-21 14:07:13,641 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5c2235c7/9d56fbb5e4a34f098d4c1277155d19e3/FLAGf8a9255d1 [2020-08-21 14:07:14,090 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:07:14,093 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_non_eq-2.c [2020-08-21 14:07:14,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5c2235c7/9d56fbb5e4a34f098d4c1277155d19e3/FLAGf8a9255d1 [2020-08-21 14:07:14,427 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5c2235c7/9d56fbb5e4a34f098d4c1277155d19e3 [2020-08-21 14:07:14,435 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:07:14,437 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:07:14,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:07:14,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:07:14,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:07:14,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:07:14" (1/1) ... [2020-08-21 14:07:14,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@770ea115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:14, skipping insertion in model container [2020-08-21 14:07:14,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:07:14" (1/1) ... [2020-08-21 14:07:14,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:07:14,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:07:14,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:07:14,637 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:07:14,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:07:14,663 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:07:14,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:14 WrapperNode [2020-08-21 14:07:14,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:07:14,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:07:14,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:07:14,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:07:14,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:14" (1/1) ... [2020-08-21 14:07:14,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:14" (1/1) ... [2020-08-21 14:07:14,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:14" (1/1) ... [2020-08-21 14:07:14,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:14" (1/1) ... [2020-08-21 14:07:14,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:14" (1/1) ... [2020-08-21 14:07:14,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:14" (1/1) ... [2020-08-21 14:07:14,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:14" (1/1) ... [2020-08-21 14:07:14,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:07:14,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:07:14,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:07:14,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:07:14,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:14" (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 [2020-08-21 14:07:14,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:07:14,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:07:14,848 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-21 14:07:14,848 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:07:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 14:07:14,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:07:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-21 14:07:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:07:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:07:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:07:15,013 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:07:15,013 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 14:07:15,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:07:15 BoogieIcfgContainer [2020-08-21 14:07:15,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:07:15,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:07:15,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:07:15,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:07:15,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:07:14" (1/3) ... [2020-08-21 14:07:15,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192fbfdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:07:15, skipping insertion in model container [2020-08-21 14:07:15,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:07:14" (2/3) ... [2020-08-21 14:07:15,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192fbfdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:07:15, skipping insertion in model container [2020-08-21 14:07:15,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:07:15" (3/3) ... [2020-08-21 14:07:15,027 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_non_eq-2.c [2020-08-21 14:07:15,039 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:07:15,047 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:07:15,063 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:07:15,133 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:07:15,133 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:07:15,134 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:07:15,134 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:07:15,134 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:07:15,134 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:07:15,134 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:07:15,134 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:07:15,174 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 14:07:15,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 14:07:15,181 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:15,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:15,182 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:15,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:15,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-21 14:07:15,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:15,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301340125] [2020-08-21 14:07:15,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:15,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:15,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:07:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:07:15,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301340125] [2020-08-21 14:07:15,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:07:15,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:07:15,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290999636] [2020-08-21 14:07:15,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:07:15,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:15,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:07:15,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:07:15,627 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 6 states. [2020-08-21 14:07:15,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:15,754 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-21 14:07:15,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:07:15,756 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-08-21 14:07:15,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:15,767 INFO L225 Difference]: With dead ends: 32 [2020-08-21 14:07:15,769 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 14:07:15,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:07:15,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 14:07:15,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 14:07:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 14:07:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 14:07:15,816 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 14:07:15,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:15,817 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 14:07:15,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:07:15,817 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 14:07:15,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:07:15,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:07:15,819 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:07:15,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:07:15,820 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:07:15,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:07:15,821 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-21 14:07:15,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:07:15,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908198681] [2020-08-21 14:07:15,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:07:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:15,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:07:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:15,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:07:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:16,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:07:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:07:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 14:07:16,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908198681] [2020-08-21 14:07:16,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:07:16,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 14:07:16,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522879206] [2020-08-21 14:07:16,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:07:16,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:07:16,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:07:16,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:07:16,180 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-08-21 14:07:16,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:07:16,344 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2020-08-21 14:07:16,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 14:07:16,345 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-08-21 14:07:16,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:07:16,346 INFO L225 Difference]: With dead ends: 18 [2020-08-21 14:07:16,346 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 14:07:16,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:07:16,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 14:07:16,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 14:07:16,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 14:07:16,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 14:07:16,356 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-08-21 14:07:16,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:07:16,356 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 14:07:16,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:07:16,357 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 14:07:16,357 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 14:07:16,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:07:16,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 14:07:16,404 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 14:07:16,404 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:07:16,404 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:07:16,405 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 14:07:16,405 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 14:07:16,405 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 14:07:16,405 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 4 10) no Hoare annotation was computed. [2020-08-21 14:07:16,418 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|)) [2020-08-21 14:07:16,419 INFO L268 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-08-21 14:07:16,419 INFO L268 CegarLoopResult]: For program point L5(lines 5 9) no Hoare annotation was computed. [2020-08-21 14:07:16,419 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 4 10) no Hoare annotation was computed. [2020-08-21 14:07:16,419 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 4 10) the Hoare annotation is: true [2020-08-21 14:07:16,421 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2020-08-21 14:07:16,422 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 19) the Hoare annotation is: true [2020-08-21 14:07:16,422 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 19) no Hoare annotation was computed. [2020-08-21 14:07:16,422 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-21 14:07:16,422 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-08-21 14:07:16,423 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-08-21 14:07:16,423 INFO L268 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-08-21 14:07:16,423 INFO L268 CegarLoopResult]: For program point L16-2(lines 12 19) no Hoare annotation was computed. [2020-08-21 14:07:16,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:07:16 BoogieIcfgContainer [2020-08-21 14:07:16,431 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:07:16,436 INFO L168 Benchmark]: Toolchain (without parser) took 1996.40 ms. Allocated memory was 140.0 MB in the beginning and 234.4 MB in the end (delta: 94.4 MB). Free memory was 102.0 MB in the beginning and 204.9 MB in the end (delta: -102.9 MB). Peak memory consumption was 80.9 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:16,438 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 14:07:16,440 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.35 ms. Allocated memory is still 140.0 MB. Free memory was 101.8 MB in the beginning and 92.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:16,441 INFO L168 Benchmark]: Boogie Preprocessor took 106.32 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 92.5 MB in the beginning and 182.0 MB in the end (delta: -89.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:16,442 INFO L168 Benchmark]: RCFGBuilder took 247.61 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 170.7 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:16,445 INFO L168 Benchmark]: TraceAbstraction took 1412.12 ms. Allocated memory was 202.9 MB in the beginning and 234.4 MB in the end (delta: 31.5 MB). Free memory was 170.0 MB in the beginning and 204.9 MB in the end (delta: -34.9 MB). Peak memory consumption was 86.0 MB. Max. memory is 7.1 GB. [2020-08-21 14:07:16,456 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 224.35 ms. Allocated memory is still 140.0 MB. Free memory was 101.8 MB in the beginning and 92.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.32 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 92.5 MB in the beginning and 182.0 MB in the end (delta: -89.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 247.61 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 170.7 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1412.12 ms. Allocated memory was 202.9 MB in the beginning and 234.4 MB in the end (delta: 31.5 MB). Free memory was 170.0 MB in the beginning and 204.9 MB in the end (delta: -34.9 MB). Peak memory consumption was 86.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 10 SDslu, 76 SDs, 0 SdLazy, 78 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 13 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 3942 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 2/4 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 correct! Received shutdown request...