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/ldv-regression/test24-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:28:41,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:28:41,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:28:41,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:28:41,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:28:41,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:28:41,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:28:41,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:28:41,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:28:41,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:28:41,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:28:41,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:28:41,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:28:41,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:28:41,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:28:41,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:28:41,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 13:28:41,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:28:41,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:28:41,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:28:41,387 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 [2019-09-20 13:28:41,411 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:28:41,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:28:41,411 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:28:41,412 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:28:41,412 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:28:41,413 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:28:41,413 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:28:41,413 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:28:41,413 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:28:41,413 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:28:41,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:28:41,414 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:28:41,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:28:41,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:28:41,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:28:41,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:28:41,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:28:41,417 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:28:41,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:28:41,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:28:41,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:28:41,418 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:28:41,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:28:41,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:28:41,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:28:41,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:28:41,419 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:28:41,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:28:41,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:28:41,420 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:28:41,477 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:28:41,495 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:28:41,500 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:28:41,502 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:28:41,503 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:28:41,504 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-1.c [2019-09-20 13:28:41,565 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a819c567/e27c934ee6bc4b83af02f9981eafdf04/FLAG3b9267c06 [2019-09-20 13:28:42,050 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:28:42,051 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-1.c [2019-09-20 13:28:42,057 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a819c567/e27c934ee6bc4b83af02f9981eafdf04/FLAG3b9267c06 [2019-09-20 13:28:42,531 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a819c567/e27c934ee6bc4b83af02f9981eafdf04 [2019-09-20 13:28:42,541 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:28:42,542 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:28:42,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:28:42,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:28:42,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:28:42,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:28:42" (1/1) ... [2019-09-20 13:28:42,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@450c6c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:42, skipping insertion in model container [2019-09-20 13:28:42,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:28:42" (1/1) ... [2019-09-20 13:28:42,559 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:28:42,573 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:28:42,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:28:42,756 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:28:42,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:28:42,875 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:28:42,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:42 WrapperNode [2019-09-20 13:28:42,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:28:42,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:28:42,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:28:42,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:28:42,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:42" (1/1) ... [2019-09-20 13:28:42,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:42" (1/1) ... [2019-09-20 13:28:42,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:42" (1/1) ... [2019-09-20 13:28:42,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:42" (1/1) ... [2019-09-20 13:28:42,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:42" (1/1) ... [2019-09-20 13:28:42,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:42" (1/1) ... [2019-09-20 13:28:42,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:42" (1/1) ... [2019-09-20 13:28:42,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:28:42,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:28:42,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:28:42,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:28:42,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:42" (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 [2019-09-20 13:28:42,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:28:42,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:28:42,974 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-09-20 13:28:42,974 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:28:42,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:28:42,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:28:42,975 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-09-20 13:28:42,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:28:42,975 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:28:42,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:28:42,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:28:42,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:28:42,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:28:42,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:28:43,195 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:28:43,196 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 13:28:43,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:28:43 BoogieIcfgContainer [2019-09-20 13:28:43,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:28:43,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:28:43,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:28:43,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:28:43,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:28:42" (1/3) ... [2019-09-20 13:28:43,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76117373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:28:43, skipping insertion in model container [2019-09-20 13:28:43,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:42" (2/3) ... [2019-09-20 13:28:43,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76117373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:28:43, skipping insertion in model container [2019-09-20 13:28:43,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:28:43" (3/3) ... [2019-09-20 13:28:43,230 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-1.c [2019-09-20 13:28:43,258 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:28:43,273 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:28:43,310 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:28:43,335 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:28:43,335 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:28:43,336 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:28:43,336 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:28:43,336 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:28:43,336 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:28:43,336 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:28:43,336 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:28:43,349 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-09-20 13:28:43,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-20 13:28:43,357 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:28:43,358 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:28:43,360 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:28:43,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:28:43,366 INFO L82 PathProgramCache]: Analyzing trace with hash 149844724, now seen corresponding path program 1 times [2019-09-20 13:28:43,368 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:28:43,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:43,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:28:43,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:43,421 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:28:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:28:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:28:43,527 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:28:43,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:28:43,527 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:28:43,532 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:28:43,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:28:43,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:28:43,546 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-09-20 13:28:43,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:28:43,560 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2019-09-20 13:28:43,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:28:43,562 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-09-20 13:28:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:28:43,574 INFO L225 Difference]: With dead ends: 22 [2019-09-20 13:28:43,574 INFO L226 Difference]: Without dead ends: 17 [2019-09-20 13:28:43,576 INFO L636 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 [2019-09-20 13:28:43,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-20 13:28:43,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-20 13:28:43,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-20 13:28:43,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-20 13:28:43,613 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-09-20 13:28:43,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:28:43,614 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-20 13:28:43,614 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:28:43,614 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-20 13:28:43,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-20 13:28:43,615 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:28:43,615 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:28:43,616 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:28:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:28:43,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1249419983, now seen corresponding path program 1 times [2019-09-20 13:28:43,616 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:28:43,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:43,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:28:43,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:43,622 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:28:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:28:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:28:43,809 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:28:43,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 13:28:43,810 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:28:43,811 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 13:28:43,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 13:28:43,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:28:43,812 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 4 states. [2019-09-20 13:28:43,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:28:43,862 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-20 13:28:43,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:28:43,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-09-20 13:28:43,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:28:43,864 INFO L225 Difference]: With dead ends: 19 [2019-09-20 13:28:43,864 INFO L226 Difference]: Without dead ends: 19 [2019-09-20 13:28:43,865 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:28:43,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-20 13:28:43,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-09-20 13:28:43,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-20 13:28:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-09-20 13:28:43,870 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2019-09-20 13:28:43,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:28:43,871 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-09-20 13:28:43,871 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 13:28:43,871 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-09-20 13:28:43,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-20 13:28:43,872 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:28:43,872 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:28:43,872 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:28:43,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:28:43,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1840889772, now seen corresponding path program 1 times [2019-09-20 13:28:43,873 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:28:43,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:43,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:28:43,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:43,876 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:28:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:28:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:28:44,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:28:44,009 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:28:44,010 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2019-09-20 13:28:44,012 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [8], [13], [16], [18], [23], [26], [33], [36], [37], [38], [39], [40], [42], [43] [2019-09-20 13:28:44,045 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:28:44,046 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:28:44,104 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-20 13:28:44,106 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 0. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 24 variables. [2019-09-20 13:28:44,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:28:44,109 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-20 13:28:44,143 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-20 13:28:44,144 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-20 13:28:44,145 INFO L420 sIntCurrentIteration]: We unified 17 AI predicates to 17 [2019-09-20 13:28:44,146 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-20 13:28:44,146 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:28:44,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 6 [2019-09-20 13:28:44,147 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:28:44,147 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:28:44,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:28:44,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:28:44,148 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 2 states. [2019-09-20 13:28:44,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:28:44,149 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-20 13:28:44,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:28:44,149 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2019-09-20 13:28:44,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:28:44,150 INFO L225 Difference]: With dead ends: 6 [2019-09-20 13:28:44,150 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:28:44,150 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:28:44,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:28:44,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:28:44,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:28:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:28:44,151 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-09-20 13:28:44,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:28:44,152 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:28:44,152 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:28:44,152 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:28:44,152 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:28:44,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:28:44 BoogieIcfgContainer [2019-09-20 13:28:44,157 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:28:44,160 INFO L168 Benchmark]: Toolchain (without parser) took 1616.88 ms. Allocated memory was 132.1 MB in the beginning and 198.2 MB in the end (delta: 66.1 MB). Free memory was 88.1 MB in the beginning and 112.4 MB in the end (delta: -24.3 MB). Peak memory consumption was 41.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:44,161 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 132.1 MB. Free memory was 106.4 MB in the beginning and 106.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:28:44,162 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.11 ms. Allocated memory was 132.1 MB in the beginning and 198.2 MB in the end (delta: 66.1 MB). Free memory was 87.8 MB in the beginning and 174.6 MB in the end (delta: -86.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:44,163 INFO L168 Benchmark]: Boogie Preprocessor took 32.27 ms. Allocated memory is still 198.2 MB. Free memory was 174.6 MB in the beginning and 172.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:44,164 INFO L168 Benchmark]: RCFGBuilder took 294.71 ms. Allocated memory is still 198.2 MB. Free memory was 172.8 MB in the beginning and 158.7 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:44,165 INFO L168 Benchmark]: TraceAbstraction took 948.23 ms. Allocated memory is still 198.2 MB. Free memory was 158.7 MB in the beginning and 112.4 MB in the end (delta: 46.4 MB). Peak memory consumption was 46.4 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:44,169 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 132.1 MB. Free memory was 106.4 MB in the beginning and 106.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 333.11 ms. Allocated memory was 132.1 MB in the beginning and 198.2 MB in the end (delta: 66.1 MB). Free memory was 87.8 MB in the beginning and 174.6 MB in the end (delta: -86.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.27 ms. Allocated memory is still 198.2 MB. Free memory was 174.6 MB in the beginning and 172.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 294.71 ms. Allocated memory is still 198.2 MB. Free memory was 172.8 MB in the beginning and 158.7 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 948.23 ms. Allocated memory is still 198.2 MB. Free memory was 158.7 MB in the beginning and 112.4 MB in the end (delta: 46.4 MB). Peak memory consumption was 46.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 36]: 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, 22 locations, 1 error locations. SAFE Result, 0.8s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 43 SDtfs, 1 SDslu, 23 SDs, 0 SdLazy, 12 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 1 AbstIntStrong, 0.8970588235294118 AbsIntWeakeningRatio, 1.5294117647058822 AbsIntAvgWeakeningVarsNumRemoved, 0.35294117647058826 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 46 ConstructedInterpolants, 0 QuantifiedInterpolants, 1434 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...