/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test28-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:47:17,139 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 02:47:17,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:47:17,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:47:17,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:47:17,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:47:17,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:47:17,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:47:17,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:47:17,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:47:17,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:47:17,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:47:17,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:47:17,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:47:17,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 02:47:17,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:47:17,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:47:17,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:47:17,209 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 [2020-08-19 02:47:17,236 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:47:17,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:47:17,237 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:47:17,238 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:47:17,238 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:47:17,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:47:17,238 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:47:17,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:47:17,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:47:17,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:47:17,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:47:17,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:47:17,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:47:17,240 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:47:17,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:47:17,240 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:47:17,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:47:17,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:47:17,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:47:17,241 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:47:17,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:47:17,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:47:17,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:47:17,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:47:17,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:47:17,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:47:17,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:47:17,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:47:17,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:47:17,245 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=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:47:17,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:47:17,582 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:47:17,587 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:47:17,589 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:47:17,591 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:47:17,592 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-2.c [2020-08-19 02:47:17,655 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a4a0468af/43f3ed9a00fe4644aec9b125aa223750/FLAGd7d564778 [2020-08-19 02:47:18,151 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:47:18,152 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test28-2.c [2020-08-19 02:47:18,159 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a4a0468af/43f3ed9a00fe4644aec9b125aa223750/FLAGd7d564778 [2020-08-19 02:47:18,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a4a0468af/43f3ed9a00fe4644aec9b125aa223750 [2020-08-19 02:47:18,515 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:47:18,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:47:18,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:47:18,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:47:18,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:47:18,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:47:18" (1/1) ... [2020-08-19 02:47:18,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eecf127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:47:18, skipping insertion in model container [2020-08-19 02:47:18,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:47:18" (1/1) ... [2020-08-19 02:47:18,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:47:18,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:47:18,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:47:18,765 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:47:18,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:47:18,795 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:47:18,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:47:18 WrapperNode [2020-08-19 02:47:18,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:47:18,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:47:18,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:47:18,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:47:18,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:47:18" (1/1) ... [2020-08-19 02:47:18,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:47:18" (1/1) ... [2020-08-19 02:47:18,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:47:18" (1/1) ... [2020-08-19 02:47:18,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:47:18" (1/1) ... [2020-08-19 02:47:18,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:47:18" (1/1) ... [2020-08-19 02:47:18,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:47:18" (1/1) ... [2020-08-19 02:47:18,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:47:18" (1/1) ... [2020-08-19 02:47:18,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:47:18,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:47:18,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:47:18,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:47:18,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:47:18" (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 [2020-08-19 02:47:18,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:47:18,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:47:18,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:47:18,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:47:18,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 02:47:18,969 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:47:18,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 02:47:18,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 02:47:18,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 02:47:18,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 02:47:18,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:47:18,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:47:19,161 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:47:19,162 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 02:47:19,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:47:19 BoogieIcfgContainer [2020-08-19 02:47:19,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:47:19,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:47:19,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:47:19,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:47:19,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:47:18" (1/3) ... [2020-08-19 02:47:19,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c3bc51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:47:19, skipping insertion in model container [2020-08-19 02:47:19,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:47:18" (2/3) ... [2020-08-19 02:47:19,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c3bc51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:47:19, skipping insertion in model container [2020-08-19 02:47:19,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:47:19" (3/3) ... [2020-08-19 02:47:19,173 INFO L109 eAbstractionObserver]: Analyzing ICFG test28-2.c [2020-08-19 02:47:19,182 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:47:19,189 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:47:19,202 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:47:19,223 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:47:19,223 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:47:19,224 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:47:19,224 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:47:19,224 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:47:19,224 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:47:19,224 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:47:19,224 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:47:19,241 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-08-19 02:47:19,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 02:47:19,246 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:47:19,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:47:19,247 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:47:19,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:47:19,252 INFO L82 PathProgramCache]: Analyzing trace with hash 668850033, now seen corresponding path program 1 times [2020-08-19 02:47:19,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:47:19,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529724086] [2020-08-19 02:47:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:47:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:47:19,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:47:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:47:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:47:19,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529724086] [2020-08-19 02:47:19,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:47:19,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:47:19,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223901979] [2020-08-19 02:47:19,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:47:19,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:47:19,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:47:19,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:47:19,660 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-08-19 02:47:19,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:47:19,754 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-08-19 02:47:19,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:47:19,756 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 02:47:19,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:47:19,766 INFO L225 Difference]: With dead ends: 34 [2020-08-19 02:47:19,766 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 02:47:19,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:47:19,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 02:47:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2020-08-19 02:47:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-19 02:47:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-08-19 02:47:19,806 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2020-08-19 02:47:19,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:47:19,807 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-08-19 02:47:19,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:47:19,807 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-08-19 02:47:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 02:47:19,808 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:47:19,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:47:19,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:47:19,809 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:47:19,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:47:19,809 INFO L82 PathProgramCache]: Analyzing trace with hash 667002991, now seen corresponding path program 1 times [2020-08-19 02:47:19,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:47:19,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175788990] [2020-08-19 02:47:19,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:47:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:47:19,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:47:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:47:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:47:19,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175788990] [2020-08-19 02:47:19,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:47:19,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 02:47:19,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575814221] [2020-08-19 02:47:19,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:47:19,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:47:19,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:47:19,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:47:19,929 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-08-19 02:47:20,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:47:20,049 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-08-19 02:47:20,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 02:47:20,050 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-08-19 02:47:20,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:47:20,051 INFO L225 Difference]: With dead ends: 23 [2020-08-19 02:47:20,051 INFO L226 Difference]: Without dead ends: 14 [2020-08-19 02:47:20,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:47:20,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-19 02:47:20,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-19 02:47:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-19 02:47:20,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2020-08-19 02:47:20,057 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2020-08-19 02:47:20,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:47:20,058 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2020-08-19 02:47:20,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:47:20,058 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2020-08-19 02:47:20,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 02:47:20,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:47:20,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:47:20,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:47:20,059 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:47:20,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:47:20,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1851109901, now seen corresponding path program 1 times [2020-08-19 02:47:20,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:47:20,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348331366] [2020-08-19 02:47:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:47:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:47:20,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:47:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:47:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:47:20,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348331366] [2020-08-19 02:47:20,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:47:20,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 02:47:20,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724046908] [2020-08-19 02:47:20,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:47:20,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:47:20,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:47:20,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:47:20,263 INFO L87 Difference]: Start difference. First operand 14 states and 13 transitions. Second operand 8 states. [2020-08-19 02:47:20,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:47:20,356 INFO L93 Difference]: Finished difference Result 14 states and 13 transitions. [2020-08-19 02:47:20,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 02:47:20,357 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-08-19 02:47:20,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:47:20,358 INFO L225 Difference]: With dead ends: 14 [2020-08-19 02:47:20,358 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 02:47:20,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:47:20,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 02:47:20,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 02:47:20,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 02:47:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 02:47:20,360 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-08-19 02:47:20,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:47:20,361 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 02:47:20,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:47:20,361 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 02:47:20,361 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 02:47:20,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:47:20,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 02:47:20,435 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-19 02:47:20,435 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-19 02:47:20,436 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 02:47:20,436 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 02:47:20,436 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 02:47:20,436 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 02:47:20,436 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 02:47:20,436 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 28) no Hoare annotation was computed. [2020-08-19 02:47:20,437 INFO L264 CegarLoopResult]: At program point L21(lines 11 28) the Hoare annotation is: false [2020-08-19 02:47:20,437 INFO L268 CegarLoopResult]: For program point L15(lines 15 19) no Hoare annotation was computed. [2020-08-19 02:47:20,437 INFO L268 CegarLoopResult]: For program point L15-2(lines 15 19) no Hoare annotation was computed. [2020-08-19 02:47:20,437 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 28) no Hoare annotation was computed. [2020-08-19 02:47:20,437 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 26) no Hoare annotation was computed. [2020-08-19 02:47:20,437 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 10 28) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-19 02:47:20,438 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-08-19 02:47:20,438 INFO L268 CegarLoopResult]: For program point L20-2(lines 20 22) no Hoare annotation was computed. [2020-08-19 02:47:20,438 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-08-19 02:47:20,438 INFO L268 CegarLoopResult]: For program point L14-2(line 14) no Hoare annotation was computed. [2020-08-19 02:47:20,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 02:47:20 BoogieIcfgContainer [2020-08-19 02:47:20,452 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 02:47:20,457 INFO L168 Benchmark]: Toolchain (without parser) took 1937.15 ms. Allocated memory was 139.5 MB in the beginning and 234.9 MB in the end (delta: 95.4 MB). Free memory was 102.6 MB in the beginning and 201.2 MB in the end (delta: -98.6 MB). Peak memory consumption was 83.4 MB. Max. memory is 7.1 GB. [2020-08-19 02:47:20,459 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-19 02:47:20,460 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.57 ms. Allocated memory is still 139.5 MB. Free memory was 102.6 MB in the beginning and 92.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-19 02:47:20,462 INFO L168 Benchmark]: Boogie Preprocessor took 107.60 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 92.3 MB in the beginning and 178.7 MB in the end (delta: -86.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-19 02:47:20,463 INFO L168 Benchmark]: RCFGBuilder took 261.17 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 164.3 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-08-19 02:47:20,471 INFO L168 Benchmark]: TraceAbstraction took 1286.01 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 164.3 MB in the beginning and 201.2 MB in the end (delta: -36.8 MB). Peak memory consumption was 83.3 MB. Max. memory is 7.1 GB. [2020-08-19 02:47:20,482 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 277.57 ms. Allocated memory is still 139.5 MB. Free memory was 102.6 MB in the beginning and 92.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.60 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 92.3 MB in the beginning and 178.7 MB in the end (delta: -86.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 261.17 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 164.3 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1286.01 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 164.3 MB in the beginning and 201.2 MB in the end (delta: -36.8 MB). Peak memory consumption was 83.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 26]: 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 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 30 SDslu, 69 SDs, 0 SdLazy, 118 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 16 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 7 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1464 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...