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/test25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:28:42,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:28:42,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:28:42,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:28:42,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:28:42,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:28:42,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:28:42,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:28:42,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:28:42,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:28:42,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:28:42,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:28:42,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:28:42,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:28:42,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:28:42,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:28:42,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:28:42,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:28:42,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:28:42,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:28:42,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:28:42,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:28:42,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:28:42,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:28:42,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 13:28:42,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:28:42,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:28:42,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:28:42,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:28:42,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:28:42,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:28:42,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:28:42,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:28:42,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:28:42,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:28:42,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:28:42,349 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 13:28:42,364 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:28:42,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:28:42,365 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:28:42,365 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:28:42,365 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:28:42,366 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:28:42,366 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:28:42,366 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:28:42,366 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:28:42,366 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:28:42,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:28:42,367 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:28:42,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:28:42,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:28:42,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:28:42,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:28:42,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:28:42,368 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:28:42,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:28:42,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:28:42,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:28:42,369 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:28:42,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:28:42,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:28:42,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:28:42,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:28:42,370 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:28:42,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:28:42,371 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:28:42,371 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:28:42,398 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:28:42,410 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:28:42,413 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:28:42,414 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:28:42,415 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:28:42,416 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-2.c [2019-09-20 13:28:42,483 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f61968551/f80aacf5a66a4f10a6513beb056e7c24/FLAG1f5de60f7 [2019-09-20 13:28:42,926 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:28:42,927 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test25-2.c [2019-09-20 13:28:42,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f61968551/f80aacf5a66a4f10a6513beb056e7c24/FLAG1f5de60f7 [2019-09-20 13:28:43,309 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f61968551/f80aacf5a66a4f10a6513beb056e7c24 [2019-09-20 13:28:43,317 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:28:43,319 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:28:43,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:28:43,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:28:43,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:28:43,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:28:43" (1/1) ... [2019-09-20 13:28:43,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12bc268c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:43, skipping insertion in model container [2019-09-20 13:28:43,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:28:43" (1/1) ... [2019-09-20 13:28:43,335 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:28:43,353 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:28:43,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:28:43,550 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:28:43,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:28:43,679 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:28:43,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:43 WrapperNode [2019-09-20 13:28:43,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:28:43,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:28:43,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:28:43,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:28:43,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:43" (1/1) ... [2019-09-20 13:28:43,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:43" (1/1) ... [2019-09-20 13:28:43,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:43" (1/1) ... [2019-09-20 13:28:43,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:43" (1/1) ... [2019-09-20 13:28:43,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:43" (1/1) ... [2019-09-20 13:28:43,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:43" (1/1) ... [2019-09-20 13:28:43,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:43" (1/1) ... [2019-09-20 13:28:43,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:28:43,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:28:43,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:28:43,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:28:43,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:43" (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 13:28:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:28:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:28:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-09-20 13:28:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:28:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:28:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:28:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-09-20 13:28:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-20 13:28:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:28:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:28:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:28:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:28:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-20 13:28:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:28:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:28:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:28:44,088 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:28:44,089 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-20 13:28:44,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:28:44 BoogieIcfgContainer [2019-09-20 13:28:44,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:28:44,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:28:44,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:28:44,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:28:44,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:28:43" (1/3) ... [2019-09-20 13:28:44,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a9da08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:28:44, skipping insertion in model container [2019-09-20 13:28:44,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:43" (2/3) ... [2019-09-20 13:28:44,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a9da08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:28:44, skipping insertion in model container [2019-09-20 13:28:44,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:28:44" (3/3) ... [2019-09-20 13:28:44,098 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-2.c [2019-09-20 13:28:44,107 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:28:44,116 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:28:44,133 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:28:44,157 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:28:44,157 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:28:44,157 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:28:44,157 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:28:44,158 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:28:44,158 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:28:44,158 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:28:44,158 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:28:44,174 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-09-20 13:28:44,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-20 13:28:44,184 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:28:44,185 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:28:44,188 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:28:44,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:28:44,194 INFO L82 PathProgramCache]: Analyzing trace with hash -899836778, now seen corresponding path program 1 times [2019-09-20 13:28:44,197 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:28:44,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:44,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:28:44,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:44,268 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:28:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:28:44,421 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 13:28:44,423 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:28:44,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:28:44,423 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:28:44,428 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:28:44,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:28:44,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:28:44,443 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-09-20 13:28:44,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:28:44,457 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2019-09-20 13:28:44,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:28:44,458 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-09-20 13:28:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:28:44,467 INFO L225 Difference]: With dead ends: 25 [2019-09-20 13:28:44,467 INFO L226 Difference]: Without dead ends: 20 [2019-09-20 13:28:44,469 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 13:28:44,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-20 13:28:44,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-20 13:28:44,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-20 13:28:44,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-09-20 13:28:44,503 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2019-09-20 13:28:44,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:28:44,504 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-09-20 13:28:44,504 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:28:44,504 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-09-20 13:28:44,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-20 13:28:44,505 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:28:44,505 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:28:44,506 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:28:44,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:28:44,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1137678901, now seen corresponding path program 1 times [2019-09-20 13:28:44,507 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:28:44,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:44,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:28:44,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:44,509 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:28:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:28:44,585 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 13:28:44,585 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:28:44,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:28:44,588 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:28:44,589 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:28:44,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:28:44,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:28:44,590 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2019-09-20 13:28:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:28:44,610 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2019-09-20 13:28:44,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:28:44,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-09-20 13:28:44,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:28:44,612 INFO L225 Difference]: With dead ends: 22 [2019-09-20 13:28:44,613 INFO L226 Difference]: Without dead ends: 22 [2019-09-20 13:28:44,614 INFO L636 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 [2019-09-20 13:28:44,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-20 13:28:44,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-09-20 13:28:44,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-20 13:28:44,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-20 13:28:44,619 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2019-09-20 13:28:44,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:28:44,619 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-20 13:28:44,619 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:28:44,619 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-20 13:28:44,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-20 13:28:44,620 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:28:44,621 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:28:44,621 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:28:44,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:28:44,622 INFO L82 PathProgramCache]: Analyzing trace with hash 278779309, now seen corresponding path program 1 times [2019-09-20 13:28:44,622 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:28:44,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:44,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:28:44,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:44,624 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:28:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:28:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:28:44,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:28:44,694 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:28:44,695 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2019-09-20 13:28:44,697 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [21], [24], [29], [32], [39], [42], [52], [55], [56], [57], [58], [59], [61], [62] [2019-09-20 13:28:44,731 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:28:44,731 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:28:44,801 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-20 13:28:44,803 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 19 root evaluator evaluations with a maximum evaluation depth of 0. Performed 19 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 36 variables. [2019-09-20 13:28:44,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:28:44,806 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-20 13:28:44,839 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-20 13:28:44,840 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-20 13:28:44,842 INFO L420 sIntCurrentIteration]: We unified 19 AI predicates to 19 [2019-09-20 13:28:44,842 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-20 13:28:44,843 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:28:44,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2019-09-20 13:28:44,844 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:28:44,844 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:28:44,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:28:44,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:28:44,845 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 2 states. [2019-09-20 13:28:44,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:28:44,846 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-20 13:28:44,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:28:44,846 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2019-09-20 13:28:44,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:28:44,847 INFO L225 Difference]: With dead ends: 6 [2019-09-20 13:28:44,847 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:28:44,847 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 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 13:28:44,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:28:44,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:28:44,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:28:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:28:44,848 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2019-09-20 13:28:44,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:28:44,849 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:28:44,849 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:28:44,849 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:28:44,849 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:28:44,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:28:44 BoogieIcfgContainer [2019-09-20 13:28:44,854 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:28:44,857 INFO L168 Benchmark]: Toolchain (without parser) took 1537.49 ms. Allocated memory was 131.6 MB in the beginning and 198.2 MB in the end (delta: 66.6 MB). Free memory was 86.4 MB in the beginning and 113.9 MB in the end (delta: -27.6 MB). Peak memory consumption was 39.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:44,858 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 131.6 MB. Free memory was 104.4 MB in the beginning and 104.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:28:44,860 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.32 ms. Allocated memory was 131.6 MB in the beginning and 198.2 MB in the end (delta: 66.6 MB). Free memory was 86.1 MB in the beginning and 174.5 MB in the end (delta: -88.4 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:44,861 INFO L168 Benchmark]: Boogie Preprocessor took 36.22 ms. Allocated memory is still 198.2 MB. Free memory was 174.5 MB in the beginning and 172.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:44,861 INFO L168 Benchmark]: RCFGBuilder took 373.48 ms. Allocated memory is still 198.2 MB. Free memory was 172.6 MB in the beginning and 155.0 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:44,862 INFO L168 Benchmark]: TraceAbstraction took 763.26 ms. Allocated memory is still 198.2 MB. Free memory was 155.0 MB in the beginning and 113.9 MB in the end (delta: 41.1 MB). Peak memory consumption was 41.1 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:44,866 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 131.6 MB. Free memory was 104.4 MB in the beginning and 104.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 360.32 ms. Allocated memory was 131.6 MB in the beginning and 198.2 MB in the end (delta: 66.6 MB). Free memory was 86.1 MB in the beginning and 174.5 MB in the end (delta: -88.4 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.22 ms. Allocated memory is still 198.2 MB. Free memory was 174.5 MB in the beginning and 172.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 373.48 ms. Allocated memory is still 198.2 MB. Free memory was 172.6 MB in the beginning and 155.0 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 763.26 ms. Allocated memory is still 198.2 MB. Free memory was 155.0 MB in the beginning and 113.9 MB in the end (delta: 41.1 MB). Peak memory consumption was 41.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 48]: 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, 3 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 52 SDtfs, 1 SDslu, 17 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s 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, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.8947368421052632 AbsIntWeakeningRatio, 1.736842105263158 AbsIntAvgWeakeningVarsNumRemoved, 0.3157894736842105 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 55 NumberOfCodeBlocks, 55 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 1054 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...