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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 13:47:50,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 13:47:50,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 13:47:50,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 13:47:50,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 13:47:50,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 13:47:50,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 13:47:50,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 13:47:50,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 13:47:50,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 13:47:50,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 13:47:50,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 13:47:50,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 13:47:50,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 13:47:50,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 13:47:50,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 13:47:50,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 13:47:50,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 13:47:50,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 13:47:50,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 13:47:50,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 13:47:50,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 13:47:50,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 13:47:50,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 13:47:50,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 13:47:50,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 13:47:50,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 13:47:50,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 13:47:50,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 13:47:50,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 13:47:50,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 13:47:50,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 13:47:50,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 13:47:50,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 13:47:50,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 13:47:50,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 13:47:50,232 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-07 13:47:50,246 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 13:47:50,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 13:47:50,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 13:47:50,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 13:47:50,247 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 13:47:50,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 13:47:50,248 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 13:47:50,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 13:47:50,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 13:47:50,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 13:47:50,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 13:47:50,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 13:47:50,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 13:47:50,249 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 13:47:50,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 13:47:50,250 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 13:47:50,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 13:47:50,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 13:47:50,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 13:47:50,250 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 13:47:50,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 13:47:50,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 13:47:50,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 13:47:50,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 13:47:50,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 13:47:50,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 13:47:50,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 13:47:50,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 13:47:50,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 13:47:50,514 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 13:47:50,529 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 13:47:50,533 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 13:47:50,534 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 13:47:50,534 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 13:47:50,535 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_3.c [2019-10-07 13:47:50,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a19ae6bfd/eddabfd8d5b74d4b98e0a9c7f982c5b6/FLAGa7a384cdc [2019-10-07 13:47:51,006 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 13:47:51,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_3.c [2019-10-07 13:47:51,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a19ae6bfd/eddabfd8d5b74d4b98e0a9c7f982c5b6/FLAGa7a384cdc [2019-10-07 13:47:51,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a19ae6bfd/eddabfd8d5b74d4b98e0a9c7f982c5b6 [2019-10-07 13:47:51,421 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 13:47:51,423 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 13:47:51,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 13:47:51,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 13:47:51,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 13:47:51,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:47:51" (1/1) ... [2019-10-07 13:47:51,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@388d384c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:51, skipping insertion in model container [2019-10-07 13:47:51,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 01:47:51" (1/1) ... [2019-10-07 13:47:51,440 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 13:47:51,456 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 13:47:51,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:47:51,625 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 13:47:51,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 13:47:51,650 INFO L192 MainTranslator]: Completed translation [2019-10-07 13:47:51,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:51 WrapperNode [2019-10-07 13:47:51,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 13:47:51,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 13:47:51,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 13:47:51,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 13:47:51,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:51" (1/1) ... [2019-10-07 13:47:51,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:51" (1/1) ... [2019-10-07 13:47:51,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:51" (1/1) ... [2019-10-07 13:47:51,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:51" (1/1) ... [2019-10-07 13:47:51,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:51" (1/1) ... [2019-10-07 13:47:51,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:51" (1/1) ... [2019-10-07 13:47:51,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:51" (1/1) ... [2019-10-07 13:47:51,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 13:47:51,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 13:47:51,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 13:47:51,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 13:47:51,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:51" (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 [2019-10-07 13:47:51,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 13:47:51,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 13:47:51,801 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-07 13:47:51,801 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-07 13:47:51,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 13:47:51,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 13:47:51,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-07 13:47:51,802 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-07 13:47:51,802 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 13:47:51,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 13:47:51,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 13:47:51,981 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 13:47:51,982 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-07 13:47:51,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:47:51 BoogieIcfgContainer [2019-10-07 13:47:51,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 13:47:51,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 13:47:51,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 13:47:51,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 13:47:51,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 01:47:51" (1/3) ... [2019-10-07 13:47:51,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c59febe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:47:51, skipping insertion in model container [2019-10-07 13:47:51,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 01:47:51" (2/3) ... [2019-10-07 13:47:51,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c59febe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 01:47:51, skipping insertion in model container [2019-10-07 13:47:51,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 01:47:51" (3/3) ... [2019-10-07 13:47:52,000 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_3.c [2019-10-07 13:47:52,039 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 13:47:52,048 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 13:47:52,072 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 13:47:52,098 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 13:47:52,098 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 13:47:52,098 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 13:47:52,099 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 13:47:52,099 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 13:47:52,099 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 13:47:52,100 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 13:47:52,100 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 13:47:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-07 13:47:52,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-07 13:47:52,124 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:47:52,124 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:47:52,126 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:47:52,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:47:52,131 INFO L82 PathProgramCache]: Analyzing trace with hash -139420869, now seen corresponding path program 1 times [2019-10-07 13:47:52,137 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:47:52,137 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:47:52,137 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:47:52,137 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:47:52,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:47:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:47:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:47:52,238 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:47:52,239 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:47:52,239 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-07 13:47:52,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-07 13:47:52,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-07 13:47:52,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-07 13:47:52,255 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-10-07 13:47:52,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:47:52,280 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-07 13:47:52,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-07 13:47:52,281 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-10-07 13:47:52,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:47:52,290 INFO L225 Difference]: With dead ends: 31 [2019-10-07 13:47:52,290 INFO L226 Difference]: Without dead ends: 15 [2019-10-07 13:47:52,294 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-07 13:47:52,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-07 13:47:52,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-07 13:47:52,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-07 13:47:52,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-07 13:47:52,334 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 9 [2019-10-07 13:47:52,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:47:52,335 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-07 13:47:52,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-07 13:47:52,335 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-07 13:47:52,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-07 13:47:52,336 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 13:47:52,336 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 13:47:52,337 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 13:47:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 13:47:52,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1283988460, now seen corresponding path program 1 times [2019-10-07 13:47:52,338 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 13:47:52,338 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:47:52,338 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:47:52,338 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 13:47:52,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 13:47:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 13:47:52,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 13:47:52,446 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 13:47:52,446 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 13:47:52,446 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 13:47:52,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 13:47:52,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 13:47:52,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 13:47:52,449 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2019-10-07 13:47:52,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 13:47:52,502 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-10-07 13:47:52,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 13:47:52,503 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-10-07 13:47:52,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 13:47:52,504 INFO L225 Difference]: With dead ends: 15 [2019-10-07 13:47:52,504 INFO L226 Difference]: Without dead ends: 0 [2019-10-07 13:47:52,505 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-07 13:47:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-07 13:47:52,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-07 13:47:52,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-07 13:47:52,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-07 13:47:52,507 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2019-10-07 13:47:52,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 13:47:52,507 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-07 13:47:52,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 13:47:52,508 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-07 13:47:52,508 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-07 13:47:52,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-07 13:47:52,591 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-10-07 13:47:52,591 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-07 13:47:52,592 INFO L439 ceAbstractionStarter]: At program point evalENTRY(lines 12 19) the Hoare annotation is: (or (= 0 ~x~0) (not (= 0 |old(~x~0)|))) [2019-10-07 13:47:52,592 INFO L443 ceAbstractionStarter]: For program point evalEXIT(lines 12 19) no Hoare annotation was computed. [2019-10-07 13:47:52,592 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-07 13:47:52,592 INFO L439 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: (= 0 ~x~0) [2019-10-07 13:47:52,592 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-07 13:47:52,593 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-07 13:47:52,593 INFO L443 ceAbstractionStarter]: For program point L30(line 30) no Hoare annotation was computed. [2019-10-07 13:47:52,594 INFO L439 ceAbstractionStarter]: At program point L27(lines 22 33) the Hoare annotation is: (or (= 0 ~x~0) (not (= 0 |old(~x~0)|))) [2019-10-07 13:47:52,595 INFO L439 ceAbstractionStarter]: At program point L26(line 26) the Hoare annotation is: (or (= 0 ~x~0) (not (= 0 |old(~x~0)|))) [2019-10-07 13:47:52,595 INFO L439 ceAbstractionStarter]: At program point L26-1(line 26) the Hoare annotation is: (or (= 0 ~x~0) (not (= 0 |old(~x~0)|))) [2019-10-07 13:47:52,595 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 22 33) no Hoare annotation was computed. [2019-10-07 13:47:52,595 INFO L439 ceAbstractionStarter]: At program point L24-1(lines 24 28) the Hoare annotation is: (not (= 0 |old(~x~0)|)) [2019-10-07 13:47:52,596 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-07 13:47:52,596 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-07 13:47:52,596 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-07 13:47:52,597 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-07 13:47:52,597 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-07 13:47:52,598 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-07 13:47:52,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 01:47:52 BoogieIcfgContainer [2019-10-07 13:47:52,603 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-07 13:47:52,610 INFO L168 Benchmark]: Toolchain (without parser) took 1185.61 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 101.7 MB in the beginning and 134.0 MB in the end (delta: -32.4 MB). Peak memory consumption was 31.6 MB. Max. memory is 7.1 GB. [2019-10-07 13:47:52,612 INFO L168 Benchmark]: CDTParser took 1.13 ms. Allocated memory is still 136.8 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-10-07 13:47:52,614 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.02 ms. Allocated memory is still 136.8 MB. Free memory was 101.5 MB in the beginning and 92.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-10-07 13:47:52,616 INFO L168 Benchmark]: Boogie Preprocessor took 103.29 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 92.3 MB in the beginning and 179.4 MB in the end (delta: -87.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2019-10-07 13:47:52,617 INFO L168 Benchmark]: RCFGBuilder took 229.88 ms. Allocated memory is still 200.8 MB. Free memory was 179.4 MB in the beginning and 167.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2019-10-07 13:47:52,619 INFO L168 Benchmark]: TraceAbstraction took 620.22 ms. Allocated memory is still 200.8 MB. Free memory was 167.9 MB in the beginning and 134.0 MB in the end (delta: 33.9 MB). Peak memory consumption was 33.9 MB. Max. memory is 7.1 GB. [2019-10-07 13:47:52,628 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.13 ms. Allocated memory is still 136.8 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 227.02 ms. Allocated memory is still 136.8 MB. Free memory was 101.5 MB in the beginning and 92.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 103.29 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 92.3 MB in the beginning and 179.4 MB in the end (delta: -87.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 229.88 ms. Allocated memory is still 200.8 MB. Free memory was 179.4 MB in the beginning and 167.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 620.22 ms. Allocated memory is still 200.8 MB. Free memory was 167.9 MB in the beginning and 134.0 MB in the end (delta: 33.9 MB). Peak memory consumption was 33.9 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 5 procedures, 20 locations, 1 error locations. Result: SAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 13 SDslu, 18 SDs, 0 SdLazy, 5 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 12 PreInvPairs, 15 NumberOfFragments, 42 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 15 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 295 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...