/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=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:41:04,654 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 18:41:04,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:41:04,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:41:04,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:41:04,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:41:04,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:41:04,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:41:04,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:41:04,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:41:04,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:41:04,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:41:04,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:41:04,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:41:04,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:41:04,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:41:04,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:41:04,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:41:04,768 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 18:41:04,809 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:41:04,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:41:04,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:41:04,812 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:41:04,812 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:41:04,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:41:04,813 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:41:04,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:41:04,813 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:41:04,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:41:04,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:41:04,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:41:04,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:41:04,815 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:41:04,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:41:04,815 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:41:04,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:41:04,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:41:04,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:41:04,816 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:41:04,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:41:04,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:41:04,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:41:04,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:41:04,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:41:04,817 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:41:04,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:41:04,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:41:04,818 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:41:04,818 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=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:41:05,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:41:05,196 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:41:05,201 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:41:05,203 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:41:05,204 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:41:05,205 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c [2020-08-18 18:41:05,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1277f95fc/b708e6f057b54341b62c82d66c6238d6/FLAGcc3daf541 [2020-08-18 18:41:05,671 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:41:05,671 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c [2020-08-18 18:41:05,678 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1277f95fc/b708e6f057b54341b62c82d66c6238d6/FLAGcc3daf541 [2020-08-18 18:41:06,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1277f95fc/b708e6f057b54341b62c82d66c6238d6 [2020-08-18 18:41:06,111 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:41:06,113 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:41:06,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:41:06,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:41:06,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:41:06,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:41:06" (1/1) ... [2020-08-18 18:41:06,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be13c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:06, skipping insertion in model container [2020-08-18 18:41:06,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:41:06" (1/1) ... [2020-08-18 18:41:06,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:41:06,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:41:06,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:41:06,319 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:41:06,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:41:06,351 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:41:06,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:06 WrapperNode [2020-08-18 18:41:06,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:41:06,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:41:06,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:41:06,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:41:06,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:06" (1/1) ... [2020-08-18 18:41:06,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:06" (1/1) ... [2020-08-18 18:41:06,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:06" (1/1) ... [2020-08-18 18:41:06,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:06" (1/1) ... [2020-08-18 18:41:06,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:06" (1/1) ... [2020-08-18 18:41:06,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:06" (1/1) ... [2020-08-18 18:41:06,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:06" (1/1) ... [2020-08-18 18:41:06,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:41:06,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:41:06,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:41:06,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:41:06,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:06" (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 18:41:06,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:41:06,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:41:06,573 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 18:41:06,574 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:41:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:41:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:41:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 18:41:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:41:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:41:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:41:06,773 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:41:06,773 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 18:41:06,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:41:06 BoogieIcfgContainer [2020-08-18 18:41:06,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:41:06,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:41:06,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:41:06,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:41:06,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:41:06" (1/3) ... [2020-08-18 18:41:06,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75577ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:41:06, skipping insertion in model container [2020-08-18 18:41:06,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:06" (2/3) ... [2020-08-18 18:41:06,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75577ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:41:06, skipping insertion in model container [2020-08-18 18:41:06,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:41:06" (3/3) ... [2020-08-18 18:41:06,811 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b5_o10-2.c [2020-08-18 18:41:06,841 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:41:06,858 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:41:06,888 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:41:06,912 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:41:06,912 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:41:06,913 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:41:06,913 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:41:06,913 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:41:06,913 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:41:06,913 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:41:06,913 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:41:06,928 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-18 18:41:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 18:41:06,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:06,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:06,936 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:06,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:06,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1250208381, now seen corresponding path program 1 times [2020-08-18 18:41:06,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:06,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640977388] [2020-08-18 18:41:06,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:07,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:07,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:41:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:07,171 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 18:41:07,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640977388] [2020-08-18 18:41:07,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:07,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:41:07,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175472691] [2020-08-18 18:41:07,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:41:07,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:07,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:41:07,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:41:07,193 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-08-18 18:41:07,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:07,247 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-18 18:41:07,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:41:07,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 18:41:07,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:07,259 INFO L225 Difference]: With dead ends: 31 [2020-08-18 18:41:07,260 INFO L226 Difference]: Without dead ends: 19 [2020-08-18 18:41:07,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:41:07,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-18 18:41:07,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-18 18:41:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-18 18:41:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-08-18 18:41:07,301 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-08-18 18:41:07,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:07,302 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-08-18 18:41:07,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:41:07,302 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-08-18 18:41:07,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:41:07,304 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:07,304 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:07,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:41:07,305 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:07,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1951994857, now seen corresponding path program 1 times [2020-08-18 18:41:07,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:07,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103798467] [2020-08-18 18:41:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:07,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:07,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:41:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:07,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 18:41:07,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103798467] [2020-08-18 18:41:07,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:41:07,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:41:07,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715459447] [2020-08-18 18:41:07,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:41:07,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:07,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:41:07,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:41:07,413 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-08-18 18:41:07,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:07,432 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-08-18 18:41:07,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:41:07,433 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 18:41:07,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:07,433 INFO L225 Difference]: With dead ends: 19 [2020-08-18 18:41:07,434 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 18:41:07,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:41:07,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 18:41:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 18:41:07,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 18:41:07,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 18:41:07,436 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-08-18 18:41:07,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:07,437 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 18:41:07,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:41:07,437 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 18:41:07,437 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 18:41:07,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:41:07,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 18:41:07,464 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 18:41:07,465 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:41:07,465 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:41:07,465 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 18:41:07,465 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 18:41:07,465 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:41:07,466 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2020-08-18 18:41:07,466 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-08-18 18:41:07,466 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-08-18 18:41:07,466 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-18 18:41:07,467 INFO L268 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-08-18 18:41:07,467 INFO L271 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: true [2020-08-18 18:41:07,467 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-18 18:41:07,467 INFO L268 CegarLoopResult]: For program point L14-2(lines 11 17) no Hoare annotation was computed. [2020-08-18 18:41:07,467 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 9) no Hoare annotation was computed. [2020-08-18 18:41:07,468 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 9) no Hoare annotation was computed. [2020-08-18 18:41:07,468 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2020-08-18 18:41:07,468 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-08-18 18:41:07,468 INFO L271 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: true [2020-08-18 18:41:07,468 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-18 18:41:07,469 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-08-18 18:41:07,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:41:07 BoogieIcfgContainer [2020-08-18 18:41:07,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:41:07,478 INFO L168 Benchmark]: Toolchain (without parser) took 1364.23 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 102.1 MB in the beginning and 134.0 MB in the end (delta: -32.0 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:07,479 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 18:41:07,480 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.14 ms. Allocated memory is still 147.8 MB. Free memory was 101.9 MB in the beginning and 92.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:07,481 INFO L168 Benchmark]: Boogie Preprocessor took 151.72 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 92.6 MB in the beginning and 183.2 MB in the end (delta: -90.6 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:07,482 INFO L168 Benchmark]: RCFGBuilder took 283.28 ms. Allocated memory is still 204.5 MB. Free memory was 183.2 MB in the beginning and 171.6 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:07,483 INFO L168 Benchmark]: TraceAbstraction took 683.03 ms. Allocated memory is still 204.5 MB. Free memory was 170.9 MB in the beginning and 134.0 MB in the end (delta: 36.9 MB). Peak memory consumption was 36.9 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:07,488 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 238.14 ms. Allocated memory is still 147.8 MB. Free memory was 101.9 MB in the beginning and 92.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 151.72 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 92.6 MB in the beginning and 183.2 MB in the end (delta: -90.6 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 283.28 ms. Allocated memory is still 204.5 MB. Free memory was 183.2 MB in the beginning and 171.6 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 683.03 ms. Allocated memory is still 204.5 MB. Free memory was 170.9 MB in the beginning and 134.0 MB in the end (delta: 36.9 MB). Peak memory consumption was 36.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 37 SDtfs, 2 SDslu, 101 SDs, 0 SdLazy, 13 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred 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, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 31 ConstructedInterpolants, 0 QuantifiedInterpolants, 777 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...