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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:02:44,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:02:44,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:02:44,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:02:44,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:02:44,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:02:44,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:02:44,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:02:44,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:02:44,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:02:44,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:02:44,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:02:44,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:02:44,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:02:44,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:02:44,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:02:44,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:02:44,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:02:44,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:02:44,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:02:44,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:02:44,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:02:44,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:02:44,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:02:44,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:02:44,976 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:02:44,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:02:44,977 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:02:44,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:02:44,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:02:44,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:02:44,980 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:02:44,982 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:02:44,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:02:44,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:02:44,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:02:44,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:02:44,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:02:44,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:02:44,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:02:44,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:02:44,993 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 [2019-10-13 21:02:45,018 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:02:45,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:02:45,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:02:45,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:02:45,020 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:02:45,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:02:45,021 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:02:45,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:02:45,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:02:45,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:02:45,022 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:02:45,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:02:45,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:02:45,023 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:02:45,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:02:45,024 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:02:45,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:02:45,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:02:45,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:02:45,024 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:02:45,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:02:45,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:02:45,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:02:45,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:02:45,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:02:45,026 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:02:45,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:02:45,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:02:45,027 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:02:45,292 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:02:45,309 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:02:45,313 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:02:45,315 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:02:45,316 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:02:45,316 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-10-13 21:02:45,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a4a29af1/82d2a0ce3c0f4f84953a99e973a77539/FLAGf08d7315d [2019-10-13 21:02:45,859 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:02:45,859 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-10-13 21:02:45,865 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a4a29af1/82d2a0ce3c0f4f84953a99e973a77539/FLAGf08d7315d [2019-10-13 21:02:46,206 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a4a29af1/82d2a0ce3c0f4f84953a99e973a77539 [2019-10-13 21:02:46,218 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:02:46,219 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:02:46,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:02:46,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:02:46,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:02:46,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:02:46" (1/1) ... [2019-10-13 21:02:46,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78d3b3cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:02:46, skipping insertion in model container [2019-10-13 21:02:46,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:02:46" (1/1) ... [2019-10-13 21:02:46,234 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:02:46,254 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:02:46,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:02:46,431 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:02:46,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:02:46,462 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:02:46,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:02:46 WrapperNode [2019-10-13 21:02:46,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:02:46,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:02:46,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:02:46,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:02:46,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:02:46" (1/1) ... [2019-10-13 21:02:46,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:02:46" (1/1) ... [2019-10-13 21:02:46,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:02:46" (1/1) ... [2019-10-13 21:02:46,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:02:46" (1/1) ... [2019-10-13 21:02:46,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:02:46" (1/1) ... [2019-10-13 21:02:46,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:02:46" (1/1) ... [2019-10-13 21:02:46,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:02:46" (1/1) ... [2019-10-13 21:02:46,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:02:46,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:02:46,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:02:46,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:02:46,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:02:46" (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 [2019-10-13 21:02:46,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:02:46,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:02:46,629 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2019-10-13 21:02:46,629 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2019-10-13 21:02:46,629 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:02:46,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:02:46,629 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2019-10-13 21:02:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2019-10-13 21:02:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:02:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:02:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:02:46,774 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:02:46,774 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:02:46,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:02:46 BoogieIcfgContainer [2019-10-13 21:02:46,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:02:46,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:02:46,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:02:46,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:02:46,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:02:46" (1/3) ... [2019-10-13 21:02:46,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277fd217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:02:46, skipping insertion in model container [2019-10-13 21:02:46,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:02:46" (2/3) ... [2019-10-13 21:02:46,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277fd217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:02:46, skipping insertion in model container [2019-10-13 21:02:46,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:02:46" (3/3) ... [2019-10-13 21:02:46,784 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2019-10-13 21:02:46,794 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:02:46,802 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:02:46,813 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:02:46,839 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:02:46,839 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:02:46,839 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:02:46,839 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:02:46,839 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:02:46,840 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:02:46,840 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:02:46,840 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:02:46,858 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-13 21:02:46,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 21:02:46,864 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:02:46,866 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:02:46,867 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:02:46,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:02:46,872 INFO L82 PathProgramCache]: Analyzing trace with hash 708560652, now seen corresponding path program 1 times [2019-10-13 21:02:46,880 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:02:46,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020251315] [2019-10-13 21:02:46,881 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:02:46,881 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:02:46,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:02:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:02:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:02:47,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020251315] [2019-10-13 21:02:47,195 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:02:47,196 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:02:47,196 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842306206] [2019-10-13 21:02:47,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:02:47,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:02:47,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:02:47,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:02:47,218 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2019-10-13 21:02:47,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:02:47,322 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2019-10-13 21:02:47,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:02:47,324 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-13 21:02:47,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:02:47,332 INFO L225 Difference]: With dead ends: 42 [2019-10-13 21:02:47,333 INFO L226 Difference]: Without dead ends: 21 [2019-10-13 21:02:47,336 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:02:47,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-13 21:02:47,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-10-13 21:02:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 21:02:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-13 21:02:47,380 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2019-10-13 21:02:47,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:02:47,381 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-13 21:02:47,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:02:47,381 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-13 21:02:47,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 21:02:47,383 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:02:47,383 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:02:47,383 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:02:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:02:47,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1910985178, now seen corresponding path program 1 times [2019-10-13 21:02:47,384 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:02:47,385 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157432824] [2019-10-13 21:02:47,385 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:02:47,385 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:02:47,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:02:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:02:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:02:47,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157432824] [2019-10-13 21:02:47,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19038184] [2019-10-13 21:02:47,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:02:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:02:47,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:02:47,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:02:47,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:02:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:02:47,621 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:02:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:02:47,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [171466827] [2019-10-13 21:02:47,673 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 18 [2019-10-13 21:02:47,711 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 21:02:47,712 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 21:02:47,921 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-13 21:02:47,924 INFO L272 AbstractInterpreter]: Visited 14 different actions 59 times. Merged at 2 different actions 10 times. Widened at 1 different actions 1 times. Performed 73 root evaluator evaluations with a maximum evaluation depth of 7. Performed 73 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2019-10-13 21:02:47,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:02:47,930 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:02:47,930 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 21:02:47,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2019-10-13 21:02:47,931 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588265563] [2019-10-13 21:02:47,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 21:02:47,933 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:02:47,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 21:02:47,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:02:47,934 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 10 states. [2019-10-13 21:02:48,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:02:48,005 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-10-13 21:02:48,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 21:02:48,005 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-10-13 21:02:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:02:48,007 INFO L225 Difference]: With dead ends: 30 [2019-10-13 21:02:48,007 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 21:02:48,008 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:02:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 21:02:48,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-10-13 21:02:48,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 21:02:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-13 21:02:48,016 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 17 [2019-10-13 21:02:48,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:02:48,016 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-13 21:02:48,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 21:02:48,017 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-13 21:02:48,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 21:02:48,018 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:02:48,018 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:02:48,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:02:48,225 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:02:48,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:02:48,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1165555160, now seen corresponding path program 2 times [2019-10-13 21:02:48,227 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:02:48,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012568566] [2019-10-13 21:02:48,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:02:48,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:02:48,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:02:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 21:02:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 21:02:48,304 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-13 21:02:48,304 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-13 21:02:48,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 09:02:48 BoogieIcfgContainer [2019-10-13 21:02:48,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 21:02:48,331 INFO L168 Benchmark]: Toolchain (without parser) took 2110.46 ms. Allocated memory was 143.1 MB in the beginning and 203.4 MB in the end (delta: 60.3 MB). Free memory was 102.5 MB in the beginning and 101.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 61.6 MB. Max. memory is 7.1 GB. [2019-10-13 21:02:48,332 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 143.1 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 21:02:48,333 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.66 ms. Allocated memory is still 143.1 MB. Free memory was 102.2 MB in the beginning and 93.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-10-13 21:02:48,334 INFO L168 Benchmark]: Boogie Preprocessor took 114.53 ms. Allocated memory was 143.1 MB in the beginning and 203.4 MB in the end (delta: 60.3 MB). Free memory was 93.0 MB in the beginning and 182.9 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2019-10-13 21:02:48,335 INFO L168 Benchmark]: RCFGBuilder took 197.82 ms. Allocated memory is still 203.4 MB. Free memory was 182.9 MB in the beginning and 172.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2019-10-13 21:02:48,336 INFO L168 Benchmark]: TraceAbstraction took 1551.32 ms. Allocated memory is still 203.4 MB. Free memory was 171.6 MB in the beginning and 101.2 MB in the end (delta: 70.4 MB). Peak memory consumption was 70.4 MB. Max. memory is 7.1 GB. [2019-10-13 21:02:48,340 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 143.1 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.66 ms. Allocated memory is still 143.1 MB. Free memory was 102.2 MB in the beginning and 93.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.53 ms. Allocated memory was 143.1 MB in the beginning and 203.4 MB in the end (delta: 60.3 MB). Free memory was 93.0 MB in the beginning and 182.9 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 197.82 ms. Allocated memory is still 203.4 MB. Free memory was 182.9 MB in the beginning and 172.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1551.32 ms. Allocated memory is still 203.4 MB. Free memory was 171.6 MB in the beginning and 101.2 MB in the end (delta: 70.4 MB). Peak memory consumption was 70.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i=0; VAL [i=0] [L24] COND TRUE i<5 [L25] i++ VAL [i=1] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=1] [L24] COND TRUE i<5 [L25] i++ VAL [i=2] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=2] [L24] COND TRUE i<5 [L25] i++ VAL [i=3] [L29] CALL check_error(i!=3) VAL [\old(b)=0] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=0, b=0] [L18] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 17 SDslu, 99 SDs, 0 SdLazy, 48 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=2, 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, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 1624 SizeOfPredicates, 2 NumberOfNonLiveVariables, 39 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 6/12 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 incorrect! Received shutdown request...