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-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-03 02:31:17,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-03 02:31:17,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-03 02:31:17,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-03 02:31:17,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-03 02:31:17,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-03 02:31:17,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-03 02:31:17,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-03 02:31:17,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-03 02:31:17,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-03 02:31:17,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-03 02:31:17,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-03 02:31:17,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-03 02:31:17,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-03 02:31:17,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-03 02:31:17,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-03 02:31:17,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-03 02:31:17,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-03 02:31:17,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-03 02:31:17,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-03 02:31:17,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-03 02:31:17,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-03 02:31:17,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-03 02:31:17,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-03 02:31:17,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-03 02:31:17,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-03 02:31:17,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-03 02:31:17,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-03 02:31:17,193 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 02:31:17,208 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-03 02:31:17,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-03 02:31:17,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-03 02:31:17,209 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-03 02:31:17,210 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-03 02:31:17,210 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-03 02:31:17,210 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-03 02:31:17,211 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-03 02:31:17,211 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-03 02:31:17,211 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-03 02:31:17,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-03 02:31:17,212 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-03 02:31:17,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-03 02:31:17,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-03 02:31:17,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-03 02:31:17,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-03 02:31:17,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-03 02:31:17,213 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-03 02:31:17,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-03 02:31:17,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-03 02:31:17,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-03 02:31:17,214 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-03 02:31:17,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-03 02:31:17,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-03 02:31:17,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-03 02:31:17,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-03 02:31:17,215 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-03 02:31:17,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-03 02:31:17,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-03 02:31:17,216 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-03 02:31:17,267 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-03 02:31:17,286 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-03 02:31:17,291 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-03 02:31:17,293 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-03 02:31:17,293 INFO L275 PluginConnector]: CDTParser initialized [2019-10-03 02:31:17,295 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2019-10-03 02:31:17,371 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2616fe448/2c16949b33d14679875979903cc48f7d/FLAG855c8dee9 [2019-10-03 02:31:17,808 INFO L306 CDTParser]: Found 1 translation units. [2019-10-03 02:31:17,808 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2019-10-03 02:31:17,814 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2616fe448/2c16949b33d14679875979903cc48f7d/FLAG855c8dee9 [2019-10-03 02:31:18,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2616fe448/2c16949b33d14679875979903cc48f7d [2019-10-03 02:31:18,265 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-03 02:31:18,266 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-03 02:31:18,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-03 02:31:18,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-03 02:31:18,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-03 02:31:18,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:31:18" (1/1) ... [2019-10-03 02:31:18,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42f01636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:31:18, skipping insertion in model container [2019-10-03 02:31:18,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:31:18" (1/1) ... [2019-10-03 02:31:18,283 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-03 02:31:18,299 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-03 02:31:18,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:31:18,556 INFO L188 MainTranslator]: Completed pre-run [2019-10-03 02:31:18,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:31:18,598 INFO L192 MainTranslator]: Completed translation [2019-10-03 02:31:18,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:31:18 WrapperNode [2019-10-03 02:31:18,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-03 02:31:18,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-03 02:31:18,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-03 02:31:18,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-03 02:31:18,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:31:18" (1/1) ... [2019-10-03 02:31:18,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:31:18" (1/1) ... [2019-10-03 02:31:18,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:31:18" (1/1) ... [2019-10-03 02:31:18,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:31:18" (1/1) ... [2019-10-03 02:31:18,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:31:18" (1/1) ... [2019-10-03 02:31:18,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:31:18" (1/1) ... [2019-10-03 02:31:18,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:31:18" (1/1) ... [2019-10-03 02:31:18,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-03 02:31:18,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-03 02:31:18,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-03 02:31:18,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-03 02:31:18,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:31:18" (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 02:31:18,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-03 02:31:18,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-03 02:31:18,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-03 02:31:18,791 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-03 02:31:18,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-03 02:31:18,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-03 02:31:18,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-03 02:31:18,792 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-03 02:31:18,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-03 02:31:18,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-03 02:31:18,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-03 02:31:18,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-03 02:31:18,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-03 02:31:18,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-03 02:31:19,026 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-03 02:31:19,026 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-03 02:31:19,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:31:19 BoogieIcfgContainer [2019-10-03 02:31:19,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-03 02:31:19,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-03 02:31:19,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-03 02:31:19,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-03 02:31:19,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 02:31:18" (1/3) ... [2019-10-03 02:31:19,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dd7b22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:31:19, skipping insertion in model container [2019-10-03 02:31:19,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:31:18" (2/3) ... [2019-10-03 02:31:19,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dd7b22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:31:19, skipping insertion in model container [2019-10-03 02:31:19,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:31:19" (3/3) ... [2019-10-03 02:31:19,037 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2019-10-03 02:31:19,051 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-03 02:31:19,061 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-03 02:31:19,100 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-03 02:31:19,131 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-03 02:31:19,132 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-03 02:31:19,132 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-03 02:31:19,132 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-03 02:31:19,132 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-03 02:31:19,132 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-03 02:31:19,133 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-03 02:31:19,133 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-03 02:31:19,149 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-03 02:31:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-03 02:31:19,159 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:31:19,160 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:31:19,162 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:31:19,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:31:19,167 INFO L82 PathProgramCache]: Analyzing trace with hash -413900697, now seen corresponding path program 1 times [2019-10-03 02:31:19,169 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:31:19,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:31:19,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:31:19,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:31:19,221 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:31:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:31:19,315 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 02:31:19,316 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:31:19,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-03 02:31:19,317 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:31:19,320 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-03 02:31:19,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-03 02:31:19,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-03 02:31:19,334 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-10-03 02:31:19,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:31:19,353 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2019-10-03 02:31:19,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-03 02:31:19,355 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2019-10-03 02:31:19,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:31:19,364 INFO L225 Difference]: With dead ends: 25 [2019-10-03 02:31:19,364 INFO L226 Difference]: Without dead ends: 18 [2019-10-03 02:31:19,367 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 02:31:19,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-03 02:31:19,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-03 02:31:19,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-03 02:31:19,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-03 02:31:19,402 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-10-03 02:31:19,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:31:19,403 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-03 02:31:19,403 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-03 02:31:19,403 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-03 02:31:19,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-03 02:31:19,404 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:31:19,404 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:31:19,405 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:31:19,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:31:19,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2053026861, now seen corresponding path program 1 times [2019-10-03 02:31:19,406 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:31:19,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:31:19,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:31:19,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:31:19,409 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:31:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:31:19,481 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 02:31:19,482 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:31:19,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-03 02:31:19,482 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:31:19,483 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-03 02:31:19,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-03 02:31:19,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-03 02:31:19,484 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 3 states. [2019-10-03 02:31:19,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:31:19,529 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2019-10-03 02:31:19,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-03 02:31:19,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-03 02:31:19,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:31:19,533 INFO L225 Difference]: With dead ends: 25 [2019-10-03 02:31:19,533 INFO L226 Difference]: Without dead ends: 25 [2019-10-03 02:31:19,534 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-03 02:31:19,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-03 02:31:19,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2019-10-03 02:31:19,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-03 02:31:19,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-03 02:31:19,539 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2019-10-03 02:31:19,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:31:19,540 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-03 02:31:19,540 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-03 02:31:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-03 02:31:19,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-03 02:31:19,541 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:31:19,541 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:31:19,541 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:31:19,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:31:19,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1766388751, now seen corresponding path program 1 times [2019-10-03 02:31:19,542 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:31:19,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:31:19,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:31:19,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:31:19,544 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:31:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:31:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-03 02:31:19,628 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:31:19,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-03 02:31:19,628 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:31:19,629 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-03 02:31:19,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-03 02:31:19,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-03 02:31:19,630 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2019-10-03 02:31:19,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:31:19,729 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-10-03 02:31:19,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-03 02:31:19,730 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-10-03 02:31:19,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:31:19,731 INFO L225 Difference]: With dead ends: 27 [2019-10-03 02:31:19,731 INFO L226 Difference]: Without dead ends: 24 [2019-10-03 02:31:19,731 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 02:31:19,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-03 02:31:19,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-10-03 02:31:19,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-03 02:31:19,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-10-03 02:31:19,736 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2019-10-03 02:31:19,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:31:19,737 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-10-03 02:31:19,737 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-03 02:31:19,737 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-10-03 02:31:19,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-03 02:31:19,738 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:31:19,738 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:31:19,739 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:31:19,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:31:19,739 INFO L82 PathProgramCache]: Analyzing trace with hash -955555818, now seen corresponding path program 1 times [2019-10-03 02:31:19,740 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:31:19,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:31:19,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:31:19,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:31:19,742 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:31:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:31:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-03 02:31:19,827 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:31:19,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-03 02:31:19,827 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:31:19,828 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-03 02:31:19,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-03 02:31:19,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-03 02:31:19,829 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2019-10-03 02:31:19,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:31:19,895 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2019-10-03 02:31:19,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-03 02:31:19,895 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-03 02:31:19,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:31:19,896 INFO L225 Difference]: With dead ends: 22 [2019-10-03 02:31:19,896 INFO L226 Difference]: Without dead ends: 0 [2019-10-03 02:31:19,897 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-03 02:31:19,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-03 02:31:19,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-03 02:31:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-03 02:31:19,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-03 02:31:19,898 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2019-10-03 02:31:19,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:31:19,898 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-03 02:31:19,898 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-03 02:31:19,898 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-03 02:31:19,899 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-03 02:31:19,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 02:31:19 BoogieIcfgContainer [2019-10-03 02:31:19,904 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-03 02:31:19,907 INFO L168 Benchmark]: Toolchain (without parser) took 1639.81 ms. Allocated memory was 130.0 MB in the beginning and 197.7 MB in the end (delta: 67.6 MB). Free memory was 85.8 MB in the beginning and 109.3 MB in the end (delta: -23.5 MB). Peak memory consumption was 44.1 MB. Max. memory is 7.1 GB. [2019-10-03 02:31:19,909 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 130.0 MB. Free memory was 104.3 MB in the beginning and 104.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-03 02:31:19,910 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.21 ms. Allocated memory is still 130.0 MB. Free memory was 85.6 MB in the beginning and 75.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-10-03 02:31:19,911 INFO L168 Benchmark]: Boogie Preprocessor took 123.58 ms. Allocated memory was 130.0 MB in the beginning and 197.7 MB in the end (delta: 67.6 MB). Free memory was 75.8 MB in the beginning and 173.3 MB in the end (delta: -97.5 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. [2019-10-03 02:31:19,912 INFO L168 Benchmark]: RCFGBuilder took 304.54 ms. Allocated memory is still 197.7 MB. Free memory was 173.3 MB in the beginning and 159.4 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2019-10-03 02:31:19,913 INFO L168 Benchmark]: TraceAbstraction took 875.28 ms. Allocated memory is still 197.7 MB. Free memory was 158.8 MB in the beginning and 109.3 MB in the end (delta: 49.5 MB). Peak memory consumption was 49.5 MB. Max. memory is 7.1 GB. [2019-10-03 02:31:19,917 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 130.0 MB. Free memory was 104.3 MB in the beginning and 104.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 332.21 ms. Allocated memory is still 130.0 MB. Free memory was 85.6 MB in the beginning and 75.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.58 ms. Allocated memory was 130.0 MB in the beginning and 197.7 MB in the end (delta: 67.6 MB). Free memory was 75.8 MB in the beginning and 173.3 MB in the end (delta: -97.5 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 304.54 ms. Allocated memory is still 197.7 MB. Free memory was 173.3 MB in the beginning and 159.4 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 875.28 ms. Allocated memory is still 197.7 MB. Free memory was 158.8 MB in the beginning and 109.3 MB in the end (delta: 49.5 MB). Peak memory consumption was 49.5 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, 25 locations, 1 error locations. SAFE Result, 0.7s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 67 SDtfs, 18 SDslu, 82 SDs, 0 SdLazy, 69 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 59 ConstructedInterpolants, 0 QuantifiedInterpolants, 1371 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...