/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 false -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 13:18:58,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:18:58,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:18:58,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:18:58,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:18:58,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:18:58,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:18:58,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:18:58,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:18:58,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:18:58,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:18:58,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:18:58,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:18:58,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:18:58,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:18:58,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:18:58,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:18:58,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:18:58,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:18:58,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:18:58,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:18:58,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:18:58,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:18:58,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:18:58,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 13:18:58,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:18:58,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:18:58,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:18:58,169 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 13:18:58,190 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:18:58,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:18:58,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:18:58,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:18:58,192 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:18:58,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:18:58,193 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:18:58,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:18:58,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:18:58,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:18:58,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:18:58,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:18:58,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:18:58,194 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:18:58,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:18:58,194 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:18:58,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:18:58,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:18:58,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:18:58,195 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:18:58,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:18:58,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:18:58,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:18:58,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:18:58,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:18:58,196 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:18:58,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:18:58,196 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:18:58,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:18:58,197 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 -> false [2020-08-21 13:18:58,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:18:58,512 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:18:58,516 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:18:58,517 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:18:58,518 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:18:58,519 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_non_eq-2.c [2020-08-21 13:18:58,575 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a4baad828/013d69db81384acab71e3827069db5d4/FLAG9ec6c7ea8 [2020-08-21 13:18:58,985 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:18:58,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/sum_non_eq-2.c [2020-08-21 13:18:58,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a4baad828/013d69db81384acab71e3827069db5d4/FLAG9ec6c7ea8 [2020-08-21 13:18:59,400 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a4baad828/013d69db81384acab71e3827069db5d4 [2020-08-21 13:18:59,410 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:18:59,412 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:18:59,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:18:59,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:18:59,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:18:59,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:18:59" (1/1) ... [2020-08-21 13:18:59,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42e65116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:59, skipping insertion in model container [2020-08-21 13:18:59,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:18:59" (1/1) ... [2020-08-21 13:18:59,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:18:59,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:18:59,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:18:59,613 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:18:59,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:18:59,644 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:18:59,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:59 WrapperNode [2020-08-21 13:18:59,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:18:59,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:18:59,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:18:59,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:18:59,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:59" (1/1) ... [2020-08-21 13:18:59,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:59" (1/1) ... [2020-08-21 13:18:59,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:59" (1/1) ... [2020-08-21 13:18:59,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:59" (1/1) ... [2020-08-21 13:18:59,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:59" (1/1) ... [2020-08-21 13:18:59,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:59" (1/1) ... [2020-08-21 13:18:59,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:59" (1/1) ... [2020-08-21 13:18:59,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:18:59,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:18:59,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:18:59,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:18:59,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:59" (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 13:18:59,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:18:59,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:18:59,817 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-08-21 13:18:59,817 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:18:59,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 13:18:59,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:18:59,818 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-08-21 13:18:59,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:18:59,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:18:59,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:18:59,977 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:18:59,977 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 13:18:59,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:18:59 BoogieIcfgContainer [2020-08-21 13:18:59,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:18:59,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:18:59,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:18:59,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:18:59,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:18:59" (1/3) ... [2020-08-21 13:18:59,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13119f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:18:59, skipping insertion in model container [2020-08-21 13:18:59,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:59" (2/3) ... [2020-08-21 13:18:59,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13119f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:18:59, skipping insertion in model container [2020-08-21 13:18:59,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:18:59" (3/3) ... [2020-08-21 13:18:59,990 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_non_eq-2.c [2020-08-21 13:19:00,000 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:19:00,008 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:19:00,022 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:19:00,046 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:19:00,047 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:19:00,047 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:19:00,047 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:19:00,047 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:19:00,047 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:19:00,048 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:19:00,048 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:19:00,065 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 13:19:00,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 13:19:00,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:00,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:00,072 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:00,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:00,077 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-08-21 13:19:00,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:00,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981339542] [2020-08-21 13:19:00,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:19:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:00,640 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 13:19:00,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981339542] [2020-08-21 13:19:00,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:00,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 13:19:00,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237321913] [2020-08-21 13:19:00,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 13:19:00,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:00,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 13:19:00,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 13:19:00,675 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 6 states. [2020-08-21 13:19:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:00,819 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-21 13:19:00,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 13:19:00,821 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-08-21 13:19:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:00,832 INFO L225 Difference]: With dead ends: 32 [2020-08-21 13:19:00,833 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 13:19:00,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 13:19:00,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 13:19:00,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 13:19:00,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 13:19:00,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 13:19:00,881 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 13:19:00,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:00,882 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 13:19:00,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 13:19:00,882 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 13:19:00,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 13:19:00,884 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:00,884 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 13:19:00,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:19:00,885 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:00,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:00,886 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-08-21 13:19:00,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:00,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847163282] [2020-08-21 13:19:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:00,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:01,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:01,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:19:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:01,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:19:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:01,221 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 13:19:01,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847163282] [2020-08-21 13:19:01,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:19:01,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 13:19:01,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000483824] [2020-08-21 13:19:01,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 13:19:01,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:01,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 13:19:01,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:19:01,227 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-08-21 13:19:01,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:01,380 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2020-08-21 13:19:01,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 13:19:01,381 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-08-21 13:19:01,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:01,381 INFO L225 Difference]: With dead ends: 18 [2020-08-21 13:19:01,381 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 13:19:01,383 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 13:19:01,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 13:19:01,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 13:19:01,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 13:19:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 13:19:01,385 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-08-21 13:19:01,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:01,385 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 13:19:01,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 13:19:01,385 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 13:19:01,386 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 13:19:01,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:19:01,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 13:19:01,422 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 13:19:01,422 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:19:01,423 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:19:01,423 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 13:19:01,423 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 13:19:01,423 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 13:19:01,423 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 4 10) no Hoare annotation was computed. [2020-08-21 13:19:01,424 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 13:19:01,424 INFO L268 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-08-21 13:19:01,424 INFO L268 CegarLoopResult]: For program point L5(lines 5 9) no Hoare annotation was computed. [2020-08-21 13:19:01,424 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 4 10) no Hoare annotation was computed. [2020-08-21 13:19:01,425 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 4 10) the Hoare annotation is: true [2020-08-21 13:19:01,425 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2020-08-21 13:19:01,425 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 19) the Hoare annotation is: true [2020-08-21 13:19:01,435 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 19) no Hoare annotation was computed. [2020-08-21 13:19:01,436 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-21 13:19:01,436 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-08-21 13:19:01,436 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-08-21 13:19:01,436 INFO L268 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-08-21 13:19:01,436 INFO L268 CegarLoopResult]: For program point L16-2(lines 12 19) no Hoare annotation was computed. [2020-08-21 13:19:01,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:19:01 BoogieIcfgContainer [2020-08-21 13:19:01,446 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:19:01,449 INFO L168 Benchmark]: Toolchain (without parser) took 2036.35 ms. Allocated memory was 140.5 MB in the beginning and 234.4 MB in the end (delta: 93.8 MB). Free memory was 102.6 MB in the beginning and 205.3 MB in the end (delta: -102.7 MB). Peak memory consumption was 80.4 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:01,450 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 13:19:01,451 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.16 ms. Allocated memory is still 140.5 MB. Free memory was 102.3 MB in the beginning and 93.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:01,452 INFO L168 Benchmark]: Boogie Preprocessor took 28.85 ms. Allocated memory is still 140.5 MB. Free memory was 93.0 MB in the beginning and 91.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:01,453 INFO L168 Benchmark]: RCFGBuilder took 306.98 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 91.7 MB in the beginning and 171.7 MB in the end (delta: -80.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:01,454 INFO L168 Benchmark]: TraceAbstraction took 1463.42 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 171.1 MB in the beginning and 205.3 MB in the end (delta: -34.2 MB). Peak memory consumption was 86.0 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:01,457 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 232.16 ms. Allocated memory is still 140.5 MB. Free memory was 102.3 MB in the beginning and 93.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.85 ms. Allocated memory is still 140.5 MB. Free memory was 93.0 MB in the beginning and 91.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 306.98 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 91.7 MB in the beginning and 171.7 MB in the end (delta: -80.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1463.42 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 171.1 MB in the beginning and 205.3 MB in the end (delta: -34.2 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: 1.3s, 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, 0.4s 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, 0.7s 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...