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-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 17:03:41,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 17:03:41,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 17:03:41,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-16 17:03:41,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 17:03:41,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 17:03:41,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 17:03:41,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 17:03:41,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 17:03:41,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 17:03:41,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 17:03:41,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 17:03:41,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 17:03:41,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 17:03:41,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 17:03:41,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 17:03:41,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-16 17:03:41,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 17:03:41,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 17:03:41,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 17:03:41,843 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 [2019-09-16 17:03:41,859 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 17:03:41,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 17:03:41,859 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-16 17:03:41,860 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-16 17:03:41,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-16 17:03:41,860 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-16 17:03:41,861 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-16 17:03:41,861 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-16 17:03:41,861 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-16 17:03:41,861 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-16 17:03:41,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 17:03:41,862 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 17:03:41,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 17:03:41,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 17:03:41,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 17:03:41,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 17:03:41,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 17:03:41,863 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 17:03:41,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 17:03:41,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 17:03:41,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 17:03:41,864 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-16 17:03:41,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 17:03:41,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 17:03:41,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 17:03:41,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 17:03:41,865 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-16 17:03:41,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 17:03:41,865 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 17:03:41,866 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-16 17:03:41,893 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 17:03:41,905 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 17:03:41,908 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 17:03:41,909 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 17:03:41,910 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 17:03:41,910 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2019-09-16 17:03:41,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fa807d49/7bbceb746807455686ee9469f72a2e68/FLAG73e6e2607 [2019-09-16 17:03:42,438 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 17:03:42,439 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2019-09-16 17:03:42,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fa807d49/7bbceb746807455686ee9469f72a2e68/FLAG73e6e2607 [2019-09-16 17:03:42,804 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fa807d49/7bbceb746807455686ee9469f72a2e68 [2019-09-16 17:03:42,815 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 17:03:42,816 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 17:03:42,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 17:03:42,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 17:03:42,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 17:03:42,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:03:42" (1/1) ... [2019-09-16 17:03:42,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5780bda6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:42, skipping insertion in model container [2019-09-16 17:03:42,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:03:42" (1/1) ... [2019-09-16 17:03:42,835 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 17:03:42,880 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 17:03:43,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:03:43,230 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 17:03:43,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:03:43,331 INFO L192 MainTranslator]: Completed translation [2019-09-16 17:03:43,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:43 WrapperNode [2019-09-16 17:03:43,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 17:03:43,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 17:03:43,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 17:03:43,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 17:03:43,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:43" (1/1) ... [2019-09-16 17:03:43,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:43" (1/1) ... [2019-09-16 17:03:43,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:43" (1/1) ... [2019-09-16 17:03:43,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:43" (1/1) ... [2019-09-16 17:03:43,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:43" (1/1) ... [2019-09-16 17:03:43,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:43" (1/1) ... [2019-09-16 17:03:43,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:43" (1/1) ... [2019-09-16 17:03:43,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 17:03:43,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 17:03:43,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 17:03:43,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 17:03:43,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:43" (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 [2019-09-16 17:03:43,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 17:03:43,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 17:03:43,461 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 17:03:43,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 17:03:43,461 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2019-09-16 17:03:43,461 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2019-09-16 17:03:43,461 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 17:03:43,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 17:03:43,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-16 17:03:43,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-16 17:03:43,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-16 17:03:43,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-09-16 17:03:43,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-16 17:03:43,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 17:03:43,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 17:03:43,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-16 17:03:43,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-16 17:03:44,166 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 17:03:44,167 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-16 17:03:44,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:03:44 BoogieIcfgContainer [2019-09-16 17:03:44,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 17:03:44,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 17:03:44,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 17:03:44,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 17:03:44,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 05:03:42" (1/3) ... [2019-09-16 17:03:44,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f7164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:03:44, skipping insertion in model container [2019-09-16 17:03:44,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:03:43" (2/3) ... [2019-09-16 17:03:44,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f7164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:03:44, skipping insertion in model container [2019-09-16 17:03:44,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:03:44" (3/3) ... [2019-09-16 17:03:44,179 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2019-09-16 17:03:44,191 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 17:03:44,199 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 17:03:44,216 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 17:03:44,244 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 17:03:44,244 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-16 17:03:44,244 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 17:03:44,245 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 17:03:44,245 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 17:03:44,245 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 17:03:44,245 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 17:03:44,246 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 17:03:44,262 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-16 17:03:44,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-16 17:03:44,273 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:44,274 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:44,279 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:44,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:44,285 INFO L82 PathProgramCache]: Analyzing trace with hash 316900320, now seen corresponding path program 1 times [2019-09-16 17:03:44,288 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:44,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:44,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:44,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:44,351 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:44,635 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:03:44,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-16 17:03:44,635 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:44,640 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-16 17:03:44,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-16 17:03:44,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-16 17:03:44,658 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2019-09-16 17:03:44,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:44,726 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-09-16 17:03:44,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-16 17:03:44,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-09-16 17:03:44,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:44,738 INFO L225 Difference]: With dead ends: 34 [2019-09-16 17:03:44,738 INFO L226 Difference]: Without dead ends: 24 [2019-09-16 17:03:44,740 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-16 17:03:44,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-16 17:03:44,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2019-09-16 17:03:44,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-16 17:03:44,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-16 17:03:44,776 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-09-16 17:03:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:44,776 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-16 17:03:44,776 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-16 17:03:44,777 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-16 17:03:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-16 17:03:44,777 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:44,778 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:44,778 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:44,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:44,778 INFO L82 PathProgramCache]: Analyzing trace with hash 316483246, now seen corresponding path program 1 times [2019-09-16 17:03:44,779 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:44,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:44,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:44,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:44,782 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:44,870 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:03:44,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-16 17:03:44,871 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:44,875 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-16 17:03:44,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-16 17:03:44,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-16 17:03:44,875 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2019-09-16 17:03:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:44,904 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-09-16 17:03:44,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-16 17:03:44,905 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-09-16 17:03:44,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:44,906 INFO L225 Difference]: With dead ends: 26 [2019-09-16 17:03:44,906 INFO L226 Difference]: Without dead ends: 26 [2019-09-16 17:03:44,907 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 [2019-09-16 17:03:44,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-16 17:03:44,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2019-09-16 17:03:44,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-16 17:03:44,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-09-16 17:03:44,911 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2019-09-16 17:03:44,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:44,912 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-09-16 17:03:44,912 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-16 17:03:44,912 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-09-16 17:03:44,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-16 17:03:44,913 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:03:44,913 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:03:44,913 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:03:44,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:44,914 INFO L82 PathProgramCache]: Analyzing trace with hash 625969832, now seen corresponding path program 1 times [2019-09-16 17:03:44,914 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:03:44,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:44,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:03:44,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:03:44,916 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:03:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:03:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:03:45,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:03:45,075 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:03:45,076 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2019-09-16 17:03:45,078 INFO L207 CegarAbsIntRunner]: [0], [4], [6], [9], [12], [14], [17], [18], [20], [23], [26], [30], [31], [35], [36], [37] [2019-09-16 17:03:45,134 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-16 17:03:45,135 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-16 17:03:45,213 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-16 17:03:45,215 INFO L272 AbstractInterpreter]: Visited 2 different actions 2 times. Never merged. Never widened. Performed 21 root evaluator evaluations with a maximum evaluation depth of 0. Performed 21 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 32 variables. [2019-09-16 17:03:45,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:03:45,218 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-16 17:03:45,256 INFO L219 lantSequenceWeakener]: Could never weaken! [2019-09-16 17:03:45,256 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-16 17:03:45,258 INFO L420 sIntCurrentIteration]: We unified 18 AI predicates to 18 [2019-09-16 17:03:45,258 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-16 17:03:45,259 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-16 17:03:45,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2019-09-16 17:03:45,259 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:03:45,259 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 17:03:45,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 17:03:45,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 17:03:45,260 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 2 states. [2019-09-16 17:03:45,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:03:45,261 INFO L93 Difference]: Finished difference Result 2 states and 1 transitions. [2019-09-16 17:03:45,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 17:03:45,261 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2019-09-16 17:03:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:03:45,262 INFO L225 Difference]: With dead ends: 2 [2019-09-16 17:03:45,262 INFO L226 Difference]: Without dead ends: 0 [2019-09-16 17:03:45,262 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 17:03:45,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-16 17:03:45,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-16 17:03:45,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-16 17:03:45,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-16 17:03:45,263 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2019-09-16 17:03:45,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:03:45,263 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-16 17:03:45,264 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 17:03:45,264 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-16 17:03:45,264 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-16 17:03:45,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 05:03:45 BoogieIcfgContainer [2019-09-16 17:03:45,269 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-16 17:03:45,271 INFO L168 Benchmark]: Toolchain (without parser) took 2454.30 ms. Allocated memory was 131.1 MB in the beginning and 220.2 MB in the end (delta: 89.1 MB). Free memory was 85.7 MB in the beginning and 134.2 MB in the end (delta: -48.5 MB). Peak memory consumption was 40.6 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:45,272 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 131.1 MB. Free memory was 105.1 MB in the beginning and 104.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-09-16 17:03:45,274 INFO L168 Benchmark]: CACSL2BoogieTranslator took 514.30 ms. Allocated memory was 131.1 MB in the beginning and 199.2 MB in the end (delta: 68.2 MB). Free memory was 85.5 MB in the beginning and 169.4 MB in the end (delta: -83.9 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:45,274 INFO L168 Benchmark]: Boogie Preprocessor took 71.48 ms. Allocated memory is still 199.2 MB. Free memory was 169.4 MB in the beginning and 166.2 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:45,275 INFO L168 Benchmark]: RCFGBuilder took 764.47 ms. Allocated memory is still 199.2 MB. Free memory was 165.6 MB in the beginning and 93.7 MB in the end (delta: 71.9 MB). Peak memory consumption was 71.9 MB. Max. memory is 7.1 GB. [2019-09-16 17:03:45,276 INFO L168 Benchmark]: TraceAbstraction took 1098.50 ms. Allocated memory was 199.2 MB in the beginning and 220.2 MB in the end (delta: 21.0 MB). Free memory was 93.7 MB in the beginning and 134.2 MB in the end (delta: -40.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-09-16 17:03:45,280 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 131.1 MB. Free memory was 105.1 MB in the beginning and 104.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 514.30 ms. Allocated memory was 131.1 MB in the beginning and 199.2 MB in the end (delta: 68.2 MB). Free memory was 85.5 MB in the beginning and 169.4 MB in the end (delta: -83.9 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.48 ms. Allocated memory is still 199.2 MB. Free memory was 169.4 MB in the beginning and 166.2 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 764.47 ms. Allocated memory is still 199.2 MB. Free memory was 165.6 MB in the beginning and 93.7 MB in the end (delta: 71.9 MB). Peak memory consumption was 71.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1098.50 ms. Allocated memory was 199.2 MB in the beginning and 220.2 MB in the end (delta: 21.0 MB). Free memory was 93.7 MB in the beginning and 134.2 MB in the end (delta: -40.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 191]: 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 3 procedures, 19 locations, 1 error locations. SAFE Result, 1.0s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 37 SDtfs, 32 SDslu, 54 SDs, 0 SdLazy, 22 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=2, 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, 1.0 AbsIntWeakeningRatio, 10.333333333333334 AbsIntAvgWeakeningVarsNumRemoved, 0.0 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 12 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 1416 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 2/5 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...