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/loops/eureka_01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:05:55,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:05:55,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:05:55,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:05:55,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:05:55,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:05:55,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:05:55,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:05:55,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:05:55,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:05:55,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:05:55,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:05:55,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:05:55,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:05:55,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:05:55,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:05:55,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:05:55,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:05:55,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:05:55,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:05:55,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:05:55,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:05:55,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:05:55,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:05:55,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:05:55,904 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:05:55,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:05:55,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:05:55,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:05:55,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:05:55,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:05:55,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:05:55,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:05:55,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:05:55,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:05:55,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:05:55,911 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 [2019-10-15 01:05:55,945 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:05:55,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:05:55,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:05:55,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:05:55,950 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:05:55,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:05:55,950 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:05:55,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:05:55,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:05:55,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:05:55,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:05:55,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:05:55,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:05:55,954 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:05:55,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:05:55,954 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:05:55,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:05:55,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:05:55,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:05:55,955 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:05:55,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:05:55,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:05:55,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:05:55,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:05:55,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:05:55,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:05:55,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:05:55,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:05:55,957 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 [2019-10-15 01:05:56,249 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:05:56,262 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:05:56,265 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:05:56,267 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:05:56,267 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:05:56,268 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-2.c [2019-10-15 01:05:56,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff2390638/8fbe1ecd2851414fb126ee94253b75ef/FLAG58a414828 [2019-10-15 01:05:56,788 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:05:56,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-2.c [2019-10-15 01:05:56,799 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff2390638/8fbe1ecd2851414fb126ee94253b75ef/FLAG58a414828 [2019-10-15 01:05:57,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff2390638/8fbe1ecd2851414fb126ee94253b75ef [2019-10-15 01:05:57,220 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:05:57,221 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:05:57,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:05:57,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:05:57,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:05:57,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:05:57" (1/1) ... [2019-10-15 01:05:57,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4509f92e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:57, skipping insertion in model container [2019-10-15 01:05:57,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:05:57" (1/1) ... [2019-10-15 01:05:57,238 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:05:57,257 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:05:57,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:05:57,462 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:05:57,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:05:57,611 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:05:57,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:57 WrapperNode [2019-10-15 01:05:57,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:05:57,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:05:57,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:05:57,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:05:57,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:57" (1/1) ... [2019-10-15 01:05:57,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:57" (1/1) ... [2019-10-15 01:05:57,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:57" (1/1) ... [2019-10-15 01:05:57,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:57" (1/1) ... [2019-10-15 01:05:57,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:57" (1/1) ... [2019-10-15 01:05:57,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:57" (1/1) ... [2019-10-15 01:05:57,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:57" (1/1) ... [2019-10-15 01:05:57,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:05:57,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:05:57,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:05:57,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:05:57,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:57" (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 [2019-10-15 01:05:57,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:05:57,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:05:57,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:05:57,726 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:05:57,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:05:57,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:05:57,727 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:05:57,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:05:57,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:05:57,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:05:57,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:05:57,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:05:57,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:05:57,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:05:58,104 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:05:58,104 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-15 01:05:58,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:05:58 BoogieIcfgContainer [2019-10-15 01:05:58,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:05:58,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:05:58,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:05:58,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:05:58,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:05:57" (1/3) ... [2019-10-15 01:05:58,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12756ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:05:58, skipping insertion in model container [2019-10-15 01:05:58,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:57" (2/3) ... [2019-10-15 01:05:58,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12756ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:05:58, skipping insertion in model container [2019-10-15 01:05:58,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:05:58" (3/3) ... [2019-10-15 01:05:58,114 INFO L109 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2019-10-15 01:05:58,122 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:05:58,130 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:05:58,140 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:05:58,163 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:05:58,164 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:05:58,164 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:05:58,164 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:05:58,164 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:05:58,164 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:05:58,164 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:05:58,164 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:05:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-10-15 01:05:58,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:05:58,184 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:58,185 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:58,186 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:58,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:58,191 INFO L82 PathProgramCache]: Analyzing trace with hash 288590464, now seen corresponding path program 1 times [2019-10-15 01:05:58,197 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:58,197 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826416522] [2019-10-15 01:05:58,198 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:58,198 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:58,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:05:58,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826416522] [2019-10-15 01:05:58,366 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:05:58,366 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:05:58,366 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202690701] [2019-10-15 01:05:58,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:05:58,373 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:58,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:05:58,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:05:58,390 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2019-10-15 01:05:58,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:58,415 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2019-10-15 01:05:58,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:05:58,417 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-10-15 01:05:58,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:58,423 INFO L225 Difference]: With dead ends: 61 [2019-10-15 01:05:58,424 INFO L226 Difference]: Without dead ends: 30 [2019-10-15 01:05:58,427 INFO L600 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 [2019-10-15 01:05:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-15 01:05:58,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-15 01:05:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-15 01:05:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-10-15 01:05:58,462 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 17 [2019-10-15 01:05:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:58,463 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-10-15 01:05:58,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:05:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-10-15 01:05:58,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:05:58,464 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:58,464 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:58,465 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:58,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:58,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1211863700, now seen corresponding path program 1 times [2019-10-15 01:05:58,466 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:58,466 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084438054] [2019-10-15 01:05:58,466 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:58,467 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:58,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:05:58,591 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084438054] [2019-10-15 01:05:58,591 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:05:58,591 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:05:58,591 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591889821] [2019-10-15 01:05:58,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:05:58,597 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:58,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:05:58,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:05:58,597 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2019-10-15 01:05:58,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:58,664 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2019-10-15 01:05:58,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:05:58,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-15 01:05:58,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:58,666 INFO L225 Difference]: With dead ends: 54 [2019-10-15 01:05:58,666 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 01:05:58,667 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:05:58,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 01:05:58,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2019-10-15 01:05:58,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-15 01:05:58,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-10-15 01:05:58,674 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2019-10-15 01:05:58,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:58,675 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-10-15 01:05:58,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:05:58,675 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-10-15 01:05:58,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:05:58,676 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:58,676 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:58,677 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:58,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:58,677 INFO L82 PathProgramCache]: Analyzing trace with hash 151989727, now seen corresponding path program 1 times [2019-10-15 01:05:58,678 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:58,678 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267562155] [2019-10-15 01:05:58,678 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:58,678 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:58,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:05:58,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267562155] [2019-10-15 01:05:58,778 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:05:58,778 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:05:58,779 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529425188] [2019-10-15 01:05:58,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:05:58,779 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:58,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:05:58,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:05:58,780 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 4 states. [2019-10-15 01:05:58,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:58,859 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2019-10-15 01:05:58,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:05:58,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-15 01:05:58,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:58,862 INFO L225 Difference]: With dead ends: 61 [2019-10-15 01:05:58,862 INFO L226 Difference]: Without dead ends: 46 [2019-10-15 01:05:58,863 INFO L600 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 [2019-10-15 01:05:58,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-15 01:05:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2019-10-15 01:05:58,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:05:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-10-15 01:05:58,875 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 20 [2019-10-15 01:05:58,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:58,876 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-10-15 01:05:58,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:05:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-10-15 01:05:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 01:05:58,877 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:58,877 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:58,878 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:58,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:58,878 INFO L82 PathProgramCache]: Analyzing trace with hash -25037678, now seen corresponding path program 1 times [2019-10-15 01:05:58,879 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:58,879 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043633364] [2019-10-15 01:05:58,879 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:58,879 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:58,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:05:58,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043633364] [2019-10-15 01:05:58,951 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:05:58,951 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:05:58,952 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023871411] [2019-10-15 01:05:58,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:05:58,952 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:58,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:05:58,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:05:58,953 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 4 states. [2019-10-15 01:05:59,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:59,016 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-15 01:05:59,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:05:59,017 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-15 01:05:59,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:59,018 INFO L225 Difference]: With dead ends: 55 [2019-10-15 01:05:59,018 INFO L226 Difference]: Without dead ends: 35 [2019-10-15 01:05:59,019 INFO L600 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 [2019-10-15 01:05:59,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-15 01:05:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-15 01:05:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 01:05:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-10-15 01:05:59,033 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 23 [2019-10-15 01:05:59,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:59,033 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-10-15 01:05:59,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:05:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-10-15 01:05:59,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 01:05:59,036 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:59,036 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:59,036 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:59,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:59,037 INFO L82 PathProgramCache]: Analyzing trace with hash -651240250, now seen corresponding path program 1 times [2019-10-15 01:05:59,038 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:59,038 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542403327] [2019-10-15 01:05:59,039 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:59,049 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:59,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:05:59,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542403327] [2019-10-15 01:05:59,130 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:05:59,131 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:05:59,131 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608831235] [2019-10-15 01:05:59,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:05:59,132 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:59,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:05:59,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:05:59,132 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 4 states. [2019-10-15 01:05:59,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:59,208 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2019-10-15 01:05:59,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:05:59,209 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2019-10-15 01:05:59,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:59,210 INFO L225 Difference]: With dead ends: 58 [2019-10-15 01:05:59,210 INFO L226 Difference]: Without dead ends: 47 [2019-10-15 01:05:59,211 INFO L600 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 [2019-10-15 01:05:59,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-15 01:05:59,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2019-10-15 01:05:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-15 01:05:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-15 01:05:59,218 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 26 [2019-10-15 01:05:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:59,218 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-15 01:05:59,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:05:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-15 01:05:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 01:05:59,219 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:59,220 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:59,220 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:59,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:59,220 INFO L82 PathProgramCache]: Analyzing trace with hash -118036183, now seen corresponding path program 1 times [2019-10-15 01:05:59,221 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:59,221 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467976283] [2019-10-15 01:05:59,221 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:59,221 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:59,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:05:59,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467976283] [2019-10-15 01:05:59,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635723537] [2019-10-15 01:05:59,285 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 [2019-10-15 01:05:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:59,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:05:59,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:05:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:05:59,450 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:05:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:05:59,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1653870910] [2019-10-15 01:05:59,517 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 30 [2019-10-15 01:05:59,566 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:05:59,567 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:05:59,633 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 01:05:59,635 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 21 root evaluator evaluations with a maximum evaluation depth of 0. Performed 21 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 46 variables. [2019-10-15 01:05:59,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:59,639 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 01:05:59,676 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-10-15 01:05:59,677 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 01:05:59,678 INFO L553 sIntCurrentIteration]: We unified 28 AI predicates to 28 [2019-10-15 01:05:59,679 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 01:05:59,679 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:05:59,680 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4, 4] total 8 [2019-10-15 01:05:59,680 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397684394] [2019-10-15 01:05:59,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:05:59,681 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:59,682 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 01:05:59,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:05:59,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:05:59,682 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 2 states. [2019-10-15 01:05:59,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:59,684 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2019-10-15 01:05:59,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:05:59,685 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2019-10-15 01:05:59,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:59,685 INFO L225 Difference]: With dead ends: 34 [2019-10-15 01:05:59,685 INFO L226 Difference]: Without dead ends: 0 [2019-10-15 01:05:59,686 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:05:59,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-15 01:05:59,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-15 01:05:59,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-15 01:05:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-15 01:05:59,687 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2019-10-15 01:05:59,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:59,687 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-15 01:05:59,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:05:59,688 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-15 01:05:59,688 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-15 01:05:59,891 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:59,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-15 01:05:59,921 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-15 01:05:59,921 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-10-15 01:05:59,921 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-15 01:05:59,921 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-15 01:05:59,922 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-15 01:05:59,922 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-15 01:05:59,922 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-15 01:05:59,922 INFO L443 ceAbstractionStarter]: For program point L31-2(lines 31 42) no Hoare annotation was computed. [2019-10-15 01:05:59,922 INFO L439 ceAbstractionStarter]: At program point L31-3(lines 31 42) the Hoare annotation is: false [2019-10-15 01:05:59,922 INFO L443 ceAbstractionStarter]: For program point L31-4(lines 31 42) no Hoare annotation was computed. [2019-10-15 01:05:59,922 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 11 59) no Hoare annotation was computed. [2019-10-15 01:05:59,923 INFO L443 ceAbstractionStarter]: For program point L23(lines 23 28) no Hoare annotation was computed. [2019-10-15 01:05:59,923 INFO L443 ceAbstractionStarter]: For program point L53-2(lines 53 56) no Hoare annotation was computed. [2019-10-15 01:05:59,923 INFO L439 ceAbstractionStarter]: At program point L53-3(lines 53 56) the Hoare annotation is: false [2019-10-15 01:05:59,924 INFO L443 ceAbstractionStarter]: For program point L53-4(lines 53 56) no Hoare annotation was computed. [2019-10-15 01:05:59,924 INFO L443 ceAbstractionStarter]: For program point L37(lines 37 40) no Hoare annotation was computed. [2019-10-15 01:05:59,924 INFO L443 ceAbstractionStarter]: For program point L33-2(lines 33 41) no Hoare annotation was computed. [2019-10-15 01:05:59,924 INFO L439 ceAbstractionStarter]: At program point L33-3(lines 33 41) the Hoare annotation is: false [2019-10-15 01:05:59,925 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 11 59) no Hoare annotation was computed. [2019-10-15 01:05:59,925 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 11 59) the Hoare annotation is: true [2019-10-15 01:05:59,925 INFO L439 ceAbstractionStarter]: At program point L55(line 55) the Hoare annotation is: false [2019-10-15 01:05:59,925 INFO L443 ceAbstractionStarter]: For program point L55-1(line 55) no Hoare annotation was computed. [2019-10-15 01:05:59,925 INFO L443 ceAbstractionStarter]: For program point L22-2(lines 22 29) no Hoare annotation was computed. [2019-10-15 01:05:59,925 INFO L439 ceAbstractionStarter]: At program point L22-3(lines 22 29) the Hoare annotation is: false [2019-10-15 01:05:59,925 INFO L443 ceAbstractionStarter]: For program point L22-4(lines 22 29) no Hoare annotation was computed. [2019-10-15 01:05:59,926 INFO L443 ceAbstractionStarter]: For program point L47(lines 47 50) no Hoare annotation was computed. [2019-10-15 01:05:59,926 INFO L443 ceAbstractionStarter]: For program point L43-2(lines 43 51) no Hoare annotation was computed. [2019-10-15 01:05:59,926 INFO L439 ceAbstractionStarter]: At program point L43-3(lines 43 51) the Hoare annotation is: false [2019-10-15 01:05:59,926 INFO L443 ceAbstractionStarter]: For program point L43-4(lines 43 51) no Hoare annotation was computed. [2019-10-15 01:05:59,927 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-15 01:05:59,927 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-15 01:05:59,927 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-15 01:05:59,927 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-15 01:05:59,927 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-15 01:05:59,928 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-15 01:05:59,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 01:05:59 BoogieIcfgContainer [2019-10-15 01:05:59,940 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 01:05:59,946 INFO L168 Benchmark]: Toolchain (without parser) took 2720.92 ms. Allocated memory was 147.8 MB in the beginning and 232.8 MB in the end (delta: 84.9 MB). Free memory was 105.4 MB in the beginning and 140.6 MB in the end (delta: -35.2 MB). Peak memory consumption was 49.7 MB. Max. memory is 7.1 GB. [2019-10-15 01:05:59,947 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 147.8 MB. Free memory is still 123.8 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-10-15 01:05:59,953 INFO L168 Benchmark]: CACSL2BoogieTranslator took 389.36 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 104.9 MB in the beginning and 183.8 MB in the end (delta: -78.9 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2019-10-15 01:05:59,954 INFO L168 Benchmark]: Boogie Preprocessor took 55.35 ms. Allocated memory is still 205.0 MB. Free memory was 183.8 MB in the beginning and 180.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2019-10-15 01:05:59,955 INFO L168 Benchmark]: RCFGBuilder took 438.59 ms. Allocated memory is still 205.0 MB. Free memory was 180.7 MB in the beginning and 158.9 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2019-10-15 01:05:59,958 INFO L168 Benchmark]: TraceAbstraction took 1833.46 ms. Allocated memory was 205.0 MB in the beginning and 232.8 MB in the end (delta: 27.8 MB). Free memory was 158.9 MB in the beginning and 140.6 MB in the end (delta: 18.3 MB). Peak memory consumption was 46.1 MB. Max. memory is 7.1 GB. [2019-10-15 01:05:59,966 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 147.8 MB. Free memory is still 123.8 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 389.36 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 104.9 MB in the beginning and 183.8 MB in the end (delta: -78.9 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 55.35 ms. Allocated memory is still 205.0 MB. Free memory was 183.8 MB in the beginning and 180.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 438.59 ms. Allocated memory is still 205.0 MB. Free memory was 180.7 MB in the beginning and 158.9 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1833.46 ms. Allocated memory was 205.0 MB in the beginning and 232.8 MB in the end (delta: 27.8 MB). Free memory was 158.9 MB in the beginning and 140.6 MB in the end (delta: 18.3 MB). Peak memory consumption was 46.1 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 - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 43]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 35 locations, 1 error locations. Result: SAFE, OverallTime: 1.7s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 157 SDtfs, 103 SDslu, 80 SDs, 0 SdLazy, 90 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred 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, 6 MinimizatonAttempts, 31 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 16 PreInvPairs, 16 NumberOfFragments, 11 HoareAnnotationTreeSize, 16 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 182 ConstructedInterpolants, 0 QuantifiedInterpolants, 7610 SizeOfPredicates, 2 NumberOfNonLiveVariables, 249 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 15/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 123, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 0.9107142857142857, AVG_VARS_REMOVED_DURING_WEAKENING: 1.6071428571428572, AVG_WEAKENED_CONJUNCTS: 0.39285714285714285, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...