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 -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-03 02:33:11,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-03 02:33:11,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-03 02:33:11,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-03 02:33:11,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-03 02:33:11,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-03 02:33:11,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-03 02:33:11,146 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-03 02:33:11,169 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-03 02:33:11,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-03 02:33:11,170 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-03 02:33:11,170 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-03 02:33:11,171 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-03 02:33:11,171 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-03 02:33:11,171 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-03 02:33:11,171 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-03 02:33:11,172 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-03 02:33:11,172 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-03 02:33:11,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-03 02:33:11,174 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-03 02:33:11,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-03 02:33:11,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-03 02:33:11,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-03 02:33:11,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-03 02:33:11,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-03 02:33:11,176 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-03 02:33:11,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-03 02:33:11,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-03 02:33:11,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-03 02:33:11,177 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-03 02:33:11,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-03 02:33:11,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-03 02:33:11,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-03 02:33:11,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-03 02:33:11,178 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-03 02:33:11,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-03 02:33:11,179 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-03 02:33:11,179 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-03 02:33:11,228 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-03 02:33:11,241 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-03 02:33:11,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-03 02:33:11,247 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-03 02:33:11,247 INFO L275 PluginConnector]: CDTParser initialized [2019-10-03 02:33:11,248 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2019-10-03 02:33:11,329 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab4ac2867/7b307120e5704be2b59ecb838bea7695/FLAG2af13ea76 [2019-10-03 02:33:11,821 INFO L306 CDTParser]: Found 1 translation units. [2019-10-03 02:33:11,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014.i [2019-10-03 02:33:11,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab4ac2867/7b307120e5704be2b59ecb838bea7695/FLAG2af13ea76 [2019-10-03 02:33:12,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab4ac2867/7b307120e5704be2b59ecb838bea7695 [2019-10-03 02:33:12,190 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-03 02:33:12,191 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-03 02:33:12,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-03 02:33:12,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-03 02:33:12,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-03 02:33:12,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:33:12" (1/1) ... [2019-10-03 02:33:12,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14541d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:12, skipping insertion in model container [2019-10-03 02:33:12,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:33:12" (1/1) ... [2019-10-03 02:33:12,210 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-03 02:33:12,224 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-03 02:33:12,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:33:12,411 INFO L188 MainTranslator]: Completed pre-run [2019-10-03 02:33:12,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:33:12,448 INFO L192 MainTranslator]: Completed translation [2019-10-03 02:33:12,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:12 WrapperNode [2019-10-03 02:33:12,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-03 02:33:12,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-03 02:33:12,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-03 02:33:12,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-03 02:33:12,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:12" (1/1) ... [2019-10-03 02:33:12,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:12" (1/1) ... [2019-10-03 02:33:12,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:12" (1/1) ... [2019-10-03 02:33:12,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:12" (1/1) ... [2019-10-03 02:33:12,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:12" (1/1) ... [2019-10-03 02:33:12,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:12" (1/1) ... [2019-10-03 02:33:12,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:12" (1/1) ... [2019-10-03 02:33:12,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-03 02:33:12,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-03 02:33:12,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-03 02:33:12,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-03 02:33:12,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-10-03 02:33:12,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-03 02:33:12,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-03 02:33:12,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-03 02:33:12,633 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-03 02:33:12,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-03 02:33:12,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-03 02:33:12,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-03 02:33:12,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-03 02:33:12,634 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-03 02:33:12,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-03 02:33:12,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-03 02:33:12,823 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-03 02:33:12,823 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-03 02:33:12,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:33:12 BoogieIcfgContainer [2019-10-03 02:33:12,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-03 02:33:12,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-03 02:33:12,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-03 02:33:12,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-03 02:33:12,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 02:33:12" (1/3) ... [2019-10-03 02:33:12,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a00eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:33:12, skipping insertion in model container [2019-10-03 02:33:12,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:33:12" (2/3) ... [2019-10-03 02:33:12,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a00eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:33:12, skipping insertion in model container [2019-10-03 02:33:12,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:33:12" (3/3) ... [2019-10-03 02:33:12,853 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2019-10-03 02:33:12,889 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-03 02:33:12,910 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-03 02:33:12,954 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-03 02:33:12,981 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-03 02:33:12,982 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-03 02:33:12,982 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-03 02:33:12,982 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-03 02:33:12,982 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-03 02:33:12,982 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-03 02:33:12,982 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-03 02:33:12,982 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-03 02:33:12,996 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-03 02:33:13,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-03 02:33:13,005 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:33:13,006 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:33:13,008 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:33:13,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:33:13,013 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2019-10-03 02:33:13,014 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:33:13,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:13,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:33:13,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:13,068 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:33:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:33:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:13,119 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:33:13,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-03 02:33:13,120 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:33:13,123 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-03 02:33:13,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-03 02:33:13,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-03 02:33:13,137 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-10-03 02:33:13,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:33:13,152 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2019-10-03 02:33:13,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-03 02:33:13,154 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-03 02:33:13,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:33:13,164 INFO L225 Difference]: With dead ends: 20 [2019-10-03 02:33:13,164 INFO L226 Difference]: Without dead ends: 13 [2019-10-03 02:33:13,166 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-03 02:33:13,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-03 02:33:13,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-03 02:33:13,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-03 02:33:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-10-03 02:33:13,201 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-10-03 02:33:13,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:33:13,202 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-10-03 02:33:13,202 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-03 02:33:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-10-03 02:33:13,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-03 02:33:13,203 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:33:13,203 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:33:13,204 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:33:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:33:13,204 INFO L82 PathProgramCache]: Analyzing trace with hash 99303034, now seen corresponding path program 1 times [2019-10-03 02:33:13,204 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:33:13,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:13,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:33:13,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:13,207 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:33:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:33:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:13,338 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:33:13,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-03 02:33:13,338 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:33:13,340 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-03 02:33:13,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-03 02:33:13,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-03 02:33:13,341 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2019-10-03 02:33:13,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:33:13,415 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2019-10-03 02:33:13,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-03 02:33:13,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-10-03 02:33:13,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:33:13,417 INFO L225 Difference]: With dead ends: 19 [2019-10-03 02:33:13,417 INFO L226 Difference]: Without dead ends: 16 [2019-10-03 02:33:13,418 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-03 02:33:13,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-03 02:33:13,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-03 02:33:13,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-03 02:33:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-03 02:33:13,424 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2019-10-03 02:33:13,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:33:13,424 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-03 02:33:13,424 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-03 02:33:13,425 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-03 02:33:13,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-03 02:33:13,425 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:33:13,425 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:33:13,426 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:33:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:33:13,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1368172775, now seen corresponding path program 1 times [2019-10-03 02:33:13,426 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:33:13,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:13,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:33:13,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:13,428 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:33:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:33:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:13,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:33:13,529 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-03 02:33:13,530 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2019-10-03 02:33:13,532 INFO L207 CegarAbsIntRunner]: [0], [4], [9], [12], [18], [20], [27], [30], [32], [38], [39], [40], [42] [2019-10-03 02:33:13,563 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:33:13,563 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:33:13,697 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-03 02:33:13,700 INFO L272 AbstractInterpreter]: Visited 13 different actions 69 times. Merged at 4 different actions 28 times. Widened at 1 different actions 3 times. Performed 143 root evaluator evaluations with a maximum evaluation depth of 3. Performed 143 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2019-10-03 02:33:13,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:33:13,706 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-03 02:33:13,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:33:13,706 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:33:13,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:33:13,724 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-03 02:33:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:33:13,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-03 02:33:13,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:33:13,784 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:33:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:13,826 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:33:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:13,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-03 02:33:13,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2019-10-03 02:33:13,856 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:33:13,857 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-03 02:33:13,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-03 02:33:13,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-03 02:33:13,859 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2019-10-03 02:33:13,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:33:13,985 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-10-03 02:33:13,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-03 02:33:13,988 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-10-03 02:33:13,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:33:13,990 INFO L225 Difference]: With dead ends: 22 [2019-10-03 02:33:13,990 INFO L226 Difference]: Without dead ends: 19 [2019-10-03 02:33:13,991 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-03 02:33:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-03 02:33:13,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-03 02:33:13,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-03 02:33:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-10-03 02:33:13,996 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2019-10-03 02:33:13,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:33:13,996 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-10-03 02:33:13,997 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-03 02:33:13,997 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-10-03 02:33:13,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-03 02:33:13,997 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:33:13,998 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:33:13,998 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:33:13,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:33:13,999 INFO L82 PathProgramCache]: Analyzing trace with hash -467892710, now seen corresponding path program 2 times [2019-10-03 02:33:13,999 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:33:14,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:14,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:33:14,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:33:14,002 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:33:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:33:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:14,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:33:14,095 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-03 02:33:14,095 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-03 02:33:14,096 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-03 02:33:14,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:33:14,096 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-10-03 02:33:14,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-03 02:33:14,115 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:33:14,134 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-03 02:33:14,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-03 02:33:14,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-03 02:33:14,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:33:14,177 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:33:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:14,210 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:33:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:33:14,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-03 02:33:14,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2019-10-03 02:33:14,240 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:33:14,240 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-03 02:33:14,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-03 02:33:14,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-03 02:33:14,241 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 10 states. [2019-10-03 02:33:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:33:14,289 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2019-10-03 02:33:14,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-03 02:33:14,289 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-10-03 02:33:14,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:33:14,290 INFO L225 Difference]: With dead ends: 17 [2019-10-03 02:33:14,290 INFO L226 Difference]: Without dead ends: 0 [2019-10-03 02:33:14,291 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-03 02:33:14,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-03 02:33:14,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-03 02:33:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-03 02:33:14,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-03 02:33:14,292 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-10-03 02:33:14,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:33:14,293 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-03 02:33:14,293 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-03 02:33:14,293 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-03 02:33:14,293 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-03 02:33:14,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 02:33:14 BoogieIcfgContainer [2019-10-03 02:33:14,315 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-03 02:33:14,318 INFO L168 Benchmark]: Toolchain (without parser) took 2125.41 ms. Allocated memory was 141.0 MB in the beginning and 227.5 MB in the end (delta: 86.5 MB). Free memory was 87.5 MB in the beginning and 196.4 MB in the end (delta: -108.9 MB). Peak memory consumption was 74.9 MB. Max. memory is 7.1 GB. [2019-10-03 02:33:14,319 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 105.9 MB in the beginning and 105.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-03 02:33:14,320 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.02 ms. Allocated memory is still 141.0 MB. Free memory was 87.3 MB in the beginning and 78.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-10-03 02:33:14,321 INFO L168 Benchmark]: Boogie Preprocessor took 117.39 ms. Allocated memory was 141.0 MB in the beginning and 200.3 MB in the end (delta: 59.2 MB). Free memory was 78.1 MB in the beginning and 178.3 MB in the end (delta: -100.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2019-10-03 02:33:14,323 INFO L168 Benchmark]: RCFGBuilder took 257.79 ms. Allocated memory is still 200.3 MB. Free memory was 178.3 MB in the beginning and 166.4 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2019-10-03 02:33:14,324 INFO L168 Benchmark]: TraceAbstraction took 1481.37 ms. Allocated memory was 200.3 MB in the beginning and 227.5 MB in the end (delta: 27.3 MB). Free memory was 166.4 MB in the beginning and 196.4 MB in the end (delta: -30.1 MB). Peak memory consumption was 94.5 MB. Max. memory is 7.1 GB. [2019-10-03 02:33:14,331 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 105.9 MB in the beginning and 105.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 256.02 ms. Allocated memory is still 141.0 MB. Free memory was 87.3 MB in the beginning and 78.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.39 ms. Allocated memory was 141.0 MB in the beginning and 200.3 MB in the end (delta: 59.2 MB). Free memory was 78.1 MB in the beginning and 178.3 MB in the end (delta: -100.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 257.79 ms. Allocated memory is still 200.3 MB. Free memory was 178.3 MB in the beginning and 166.4 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1481.37 ms. Allocated memory was 200.3 MB in the beginning and 227.5 MB in the end (delta: 27.3 MB). Free memory was 166.4 MB in the beginning and 196.4 MB in the end (delta: -30.1 MB). Peak memory consumption was 94.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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. SAFE Result, 1.3s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 52 SDtfs, 16 SDslu, 112 SDs, 0 SdLazy, 45 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 113 ConstructedInterpolants, 0 QuantifiedInterpolants, 4411 SizeOfPredicates, 6 NumberOfNonLiveVariables, 88 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/36 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...