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/loops/ludcmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 17:02:50,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 17:02:50,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 17:02:50,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-16 17:02:50,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-16 17:02:50,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-16 17:02:50,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-16 17:02:50,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-16 17:02:50,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-16 17:02:50,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-16 17:02:50,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-16 17:02:50,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-16 17:02:50,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 17:02:50,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 17:02:50,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 17:02:50,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 17:02:50,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 17:02:50,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 17:02:50,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 17:02:50,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 17:02:50,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 17:02:50,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 17:02:50,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 17:02:50,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 17:02:50,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-16 17:02:50,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-16 17:02:50,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-16 17:02:50,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-16 17:02:50,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-16 17:02:50,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-16 17:02:50,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-16 17:02:50,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-16 17:02:50,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-16 17:02:50,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 17:02:50,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 17:02:50,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 17:02:50,248 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 17:02:50,263 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 17:02:50,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 17:02:50,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-16 17:02:50,264 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-16 17:02:50,264 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-16 17:02:50,265 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-16 17:02:50,265 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-16 17:02:50,265 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-16 17:02:50,265 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-16 17:02:50,265 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-16 17:02:50,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 17:02:50,266 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 17:02:50,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 17:02:50,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 17:02:50,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 17:02:50,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 17:02:50,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 17:02:50,267 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 17:02:50,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 17:02:50,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 17:02:50,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 17:02:50,268 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-16 17:02:50,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 17:02:50,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 17:02:50,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 17:02:50,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 17:02:50,269 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-16 17:02:50,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 17:02:50,270 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 17:02:50,270 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-16 17:02:50,303 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 17:02:50,315 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 17:02:50,318 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 17:02:50,320 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 17:02:50,320 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 17:02:50,321 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/ludcmp.c [2019-09-16 17:02:50,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a21dcf123/aa89240af5884371bb5bf1f12c050e67/FLAG218ed84cd [2019-09-16 17:02:50,798 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 17:02:50,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/ludcmp.c [2019-09-16 17:02:50,807 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a21dcf123/aa89240af5884371bb5bf1f12c050e67/FLAG218ed84cd [2019-09-16 17:02:51,201 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a21dcf123/aa89240af5884371bb5bf1f12c050e67 [2019-09-16 17:02:51,210 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 17:02:51,212 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 17:02:51,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 17:02:51,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 17:02:51,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 17:02:51,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:02:51" (1/1) ... [2019-09-16 17:02:51,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78c243ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:51, skipping insertion in model container [2019-09-16 17:02:51,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:02:51" (1/1) ... [2019-09-16 17:02:51,227 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 17:02:51,250 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 17:02:51,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:02:51,700 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 17:02:51,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:02:51,899 INFO L192 MainTranslator]: Completed translation [2019-09-16 17:02:51,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:51 WrapperNode [2019-09-16 17:02:51,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 17:02:51,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 17:02:51,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 17:02:51,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 17:02:51,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:51" (1/1) ... [2019-09-16 17:02:51,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:51" (1/1) ... [2019-09-16 17:02:51,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:51" (1/1) ... [2019-09-16 17:02:51,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:51" (1/1) ... [2019-09-16 17:02:52,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:51" (1/1) ... [2019-09-16 17:02:52,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:51" (1/1) ... [2019-09-16 17:02:52,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:51" (1/1) ... [2019-09-16 17:02:52,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 17:02:52,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 17:02:52,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 17:02:52,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 17:02:52,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:51" (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 17:02:52,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 17:02:52,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 17:02:52,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-16 17:02:52,192 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2019-09-16 17:02:52,192 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 17:02:52,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2019-09-16 17:02:52,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 17:02:52,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 17:02:52,192 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2019-09-16 17:02:52,193 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2019-09-16 17:02:52,193 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 17:02:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2019-09-16 17:02:52,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2019-09-16 17:02:52,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-16 17:02:52,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-16 17:02:52,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 17:02:52,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2019-09-16 17:02:52,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 17:02:55,070 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 17:02:55,072 INFO L283 CfgBuilder]: Removed 11 assume(true) statements. [2019-09-16 17:02:55,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:02:55 BoogieIcfgContainer [2019-09-16 17:02:55,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 17:02:55,074 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 17:02:55,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 17:02:55,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 17:02:55,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 05:02:51" (1/3) ... [2019-09-16 17:02:55,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a85e018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:02:55, skipping insertion in model container [2019-09-16 17:02:55,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:02:51" (2/3) ... [2019-09-16 17:02:55,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a85e018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:02:55, skipping insertion in model container [2019-09-16 17:02:55,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:02:55" (3/3) ... [2019-09-16 17:02:55,084 INFO L109 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2019-09-16 17:02:55,093 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 17:02:55,103 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 17:02:55,119 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 17:02:55,147 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 17:02:55,147 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-16 17:02:55,147 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 17:02:55,148 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 17:02:55,148 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 17:02:55,148 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 17:02:55,148 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 17:02:55,149 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 17:02:55,168 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2019-09-16 17:02:55,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-16 17:02:55,181 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:02:55,182 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:02:55,186 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:02:55,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:02:55,192 INFO L82 PathProgramCache]: Analyzing trace with hash 406725423, now seen corresponding path program 1 times [2019-09-16 17:02:55,194 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:02:55,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:02:55,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:02:55,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:02:55,252 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:02:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:02:55,853 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 17:02:55,855 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:02:55,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-16 17:02:55,856 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:02:55,861 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 17:02:55,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 17:02:55,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 17:02:55,875 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2019-09-16 17:02:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:02:55,893 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2019-09-16 17:02:55,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 17:02:55,895 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-09-16 17:02:55,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:02:55,904 INFO L225 Difference]: With dead ends: 64 [2019-09-16 17:02:55,904 INFO L226 Difference]: Without dead ends: 20 [2019-09-16 17:02:55,906 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 [2019-09-16 17:02:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-16 17:02:55,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-16 17:02:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-16 17:02:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-09-16 17:02:55,942 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2019-09-16 17:02:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:02:55,942 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-09-16 17:02:55,942 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 17:02:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-09-16 17:02:55,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-16 17:02:55,943 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:02:55,944 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:02:55,944 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:02:55,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:02:55,944 INFO L82 PathProgramCache]: Analyzing trace with hash 394719650, now seen corresponding path program 1 times [2019-09-16 17:02:55,945 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:02:55,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:02:55,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:02:55,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:02:55,947 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:02:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:02:56,357 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 17:02:56,357 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:02:56,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-16 17:02:56,358 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:02:56,360 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-16 17:02:56,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-16 17:02:56,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-16 17:02:56,361 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2019-09-16 17:02:56,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:02:56,408 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-09-16 17:02:56,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-16 17:02:56,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-09-16 17:02:56,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:02:56,409 INFO L225 Difference]: With dead ends: 24 [2019-09-16 17:02:56,410 INFO L226 Difference]: Without dead ends: 24 [2019-09-16 17:02:56,410 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-16 17:02:56,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-16 17:02:56,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-09-16 17:02:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-16 17:02:56,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-09-16 17:02:56,415 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2019-09-16 17:02:56,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:02:56,416 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-09-16 17:02:56,416 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-16 17:02:56,416 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-09-16 17:02:56,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-16 17:02:56,417 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:02:56,417 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:02:56,417 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:02:56,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:02:56,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1180233829, now seen corresponding path program 1 times [2019-09-16 17:02:56,418 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:02:56,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:02:56,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:02:56,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:02:56,420 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:02:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:02:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:02:56,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 17:02:56,708 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-16 17:02:56,709 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2019-09-16 17:02:56,712 INFO L207 CegarAbsIntRunner]: [141], [142], [155], [163], [169], [171], [176], [178], [180], [194], [197], [199], [207], [208], [209], [211] [2019-09-16 17:02:56,777 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-16 17:02:56,777 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-16 17:02:56,877 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-16 17:02:56,879 INFO L272 AbstractInterpreter]: Visited 2 different actions 2 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. [2019-09-16 17:02:56,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:02:56,890 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-16 17:02:56,978 INFO L219 lantSequenceWeakener]: Could never weaken! [2019-09-16 17:02:56,978 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-16 17:02:56,980 INFO L420 sIntCurrentIteration]: We unified 15 AI predicates to 15 [2019-09-16 17:02:56,986 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-16 17:02:56,988 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-16 17:02:56,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2019-09-16 17:02:56,991 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:02:56,991 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 17:02:56,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 17:02:56,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 17:02:56,992 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 2 states. [2019-09-16 17:02:56,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:02:56,994 INFO L93 Difference]: Finished difference Result 2 states and 1 transitions. [2019-09-16 17:02:56,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 17:02:56,995 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-09-16 17:02:56,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:02:56,995 INFO L225 Difference]: With dead ends: 2 [2019-09-16 17:02:56,995 INFO L226 Difference]: Without dead ends: 0 [2019-09-16 17:02:56,996 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 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 17:02:56,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-16 17:02:56,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-16 17:02:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-16 17:02:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-16 17:02:56,998 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2019-09-16 17:02:56,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:02:56,999 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-16 17:02:56,999 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 17:02:56,999 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-16 17:02:56,999 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-16 17:02:57,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 05:02:57 BoogieIcfgContainer [2019-09-16 17:02:57,007 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-16 17:02:57,012 INFO L168 Benchmark]: Toolchain (without parser) took 5797.61 ms. Allocated memory was 133.2 MB in the beginning and 337.6 MB in the end (delta: 204.5 MB). Free memory was 89.1 MB in the beginning and 185.9 MB in the end (delta: -96.9 MB). Peak memory consumption was 107.6 MB. Max. memory is 7.1 GB. [2019-09-16 17:02:57,014 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 133.2 MB. Free memory was 107.5 MB in the beginning and 107.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-16 17:02:57,016 INFO L168 Benchmark]: CACSL2BoogieTranslator took 687.05 ms. Allocated memory was 133.2 MB in the beginning and 200.3 MB in the end (delta: 67.1 MB). Free memory was 88.8 MB in the beginning and 145.8 MB in the end (delta: -56.9 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. [2019-09-16 17:02:57,018 INFO L168 Benchmark]: Boogie Preprocessor took 216.94 ms. Allocated memory is still 200.3 MB. Free memory was 145.8 MB in the beginning and 128.2 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2019-09-16 17:02:57,019 INFO L168 Benchmark]: RCFGBuilder took 2955.53 ms. Allocated memory was 200.3 MB in the beginning and 336.1 MB in the end (delta: 135.8 MB). Free memory was 128.2 MB in the beginning and 200.1 MB in the end (delta: -71.8 MB). Peak memory consumption was 117.4 MB. Max. memory is 7.1 GB. [2019-09-16 17:02:57,021 INFO L168 Benchmark]: TraceAbstraction took 1933.34 ms. Allocated memory was 336.1 MB in the beginning and 337.6 MB in the end (delta: 1.6 MB). Free memory was 200.1 MB in the beginning and 185.9 MB in the end (delta: 14.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2019-09-16 17:02:57,034 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 133.2 MB. Free memory was 107.5 MB in the beginning and 107.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 687.05 ms. Allocated memory was 133.2 MB in the beginning and 200.3 MB in the end (delta: 67.1 MB). Free memory was 88.8 MB in the beginning and 145.8 MB in the end (delta: -56.9 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 216.94 ms. Allocated memory is still 200.3 MB. Free memory was 145.8 MB in the beginning and 128.2 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 2955.53 ms. Allocated memory was 200.3 MB in the beginning and 336.1 MB in the end (delta: 135.8 MB). Free memory was 128.2 MB in the beginning and 200.1 MB in the end (delta: -71.8 MB). Peak memory consumption was 117.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1933.34 ms. Allocated memory was 336.1 MB in the beginning and 337.6 MB in the end (delta: 1.6 MB). Free memory was 200.1 MB in the beginning and 185.9 MB in the end (delta: 14.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. SAFE Result, 1.8s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 95 SDtfs, 17 SDslu, 13 SDs, 0 SdLazy, 15 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred 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, 1.0 AbsIntWeakeningRatio, 1.4 AbsIntAvgWeakeningVarsNumRemoved, 0.0 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 37 ConstructedInterpolants, 0 QuantifiedInterpolants, 1005 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...