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/array-examples/standard_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:53:05,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:53:05,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:53:05,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:53:05,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:53:05,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:53:05,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:53:05,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:53:05,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:53:05,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:53:05,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:53:05,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:53:05,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:53:05,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:53:05,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:53:05,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:53:05,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:53:05,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:53:05,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:53:05,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:53:05,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:53:05,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:53:05,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:53:05,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:53:05,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:53:05,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:53:05,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:53:05,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:53:05,492 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:53:05,493 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:53:05,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:53:05,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:53:05,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:53:05,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:53:05,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:53:05,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:53:05,503 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 19:53:05,517 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:53:05,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:53:05,519 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:53:05,519 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:53:05,519 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:53:05,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:53:05,520 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:53:05,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:53:05,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:53:05,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:53:05,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:53:05,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:53:05,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:53:05,521 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:53:05,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:53:05,523 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:53:05,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:53:05,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:53:05,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:53:05,524 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:53:05,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:53:05,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:53:05,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:53:05,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:53:05,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:53:05,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:53:05,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:53:05,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:53:05,525 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 19:53:05,792 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:53:05,806 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:53:05,809 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:53:05,811 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:53:05,811 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:53:05,812 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-10-13 19:53:05,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48fcf385e/896c2aab0eb44b5fabf86ea47cbf7bc3/FLAGc6c9f0fe3 [2019-10-13 19:53:06,360 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:53:06,362 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-10-13 19:53:06,369 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48fcf385e/896c2aab0eb44b5fabf86ea47cbf7bc3/FLAGc6c9f0fe3 [2019-10-13 19:53:06,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48fcf385e/896c2aab0eb44b5fabf86ea47cbf7bc3 [2019-10-13 19:53:06,743 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:53:06,744 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:53:06,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:53:06,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:53:06,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:53:06,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:53:06" (1/1) ... [2019-10-13 19:53:06,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5370fc2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:06, skipping insertion in model container [2019-10-13 19:53:06,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:53:06" (1/1) ... [2019-10-13 19:53:06,760 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:53:06,779 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:53:06,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:53:06,961 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:53:06,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:53:07,092 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:53:07,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07 WrapperNode [2019-10-13 19:53:07,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:53:07,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:53:07,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:53:07,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:53:07,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07" (1/1) ... [2019-10-13 19:53:07,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07" (1/1) ... [2019-10-13 19:53:07,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07" (1/1) ... [2019-10-13 19:53:07,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07" (1/1) ... [2019-10-13 19:53:07,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07" (1/1) ... [2019-10-13 19:53:07,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07" (1/1) ... [2019-10-13 19:53:07,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07" (1/1) ... [2019-10-13 19:53:07,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:53:07,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:53:07,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:53:07,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:53:07,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07" (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 19:53:07,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:53:07,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:53:07,204 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:53:07,205 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:53:07,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:53:07,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:53:07,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:53:07,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:53:07,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 19:53:07,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:53:07,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:53:07,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:53:07,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:53:07,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:53:07,501 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:53:07,502 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 19:53:07,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:53:07 BoogieIcfgContainer [2019-10-13 19:53:07,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:53:07,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:53:07,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:53:07,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:53:07,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:53:06" (1/3) ... [2019-10-13 19:53:07,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc9083d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:53:07, skipping insertion in model container [2019-10-13 19:53:07,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07" (2/3) ... [2019-10-13 19:53:07,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc9083d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:53:07, skipping insertion in model container [2019-10-13 19:53:07,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:53:07" (3/3) ... [2019-10-13 19:53:07,511 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2019-10-13 19:53:07,522 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:53:07,530 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:53:07,544 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:53:07,571 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:53:07,572 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:53:07,572 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:53:07,572 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:53:07,572 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:53:07,572 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:53:07,573 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:53:07,573 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:53:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-13 19:53:07,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 19:53:07,597 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:53:07,598 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:53:07,600 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:53:07,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:53:07,605 INFO L82 PathProgramCache]: Analyzing trace with hash -526773211, now seen corresponding path program 1 times [2019-10-13 19:53:07,613 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:53:07,614 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755598513] [2019-10-13 19:53:07,614 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:07,614 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:07,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:53:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:53:07,746 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 19:53:07,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755598513] [2019-10-13 19:53:07,748 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:53:07,748 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 19:53:07,748 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401323213] [2019-10-13 19:53:07,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 19:53:07,754 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:53:07,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 19:53:07,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:53:07,774 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-10-13 19:53:07,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:53:07,802 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2019-10-13 19:53:07,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 19:53:07,803 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-10-13 19:53:07,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:53:07,814 INFO L225 Difference]: With dead ends: 56 [2019-10-13 19:53:07,814 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 19:53:07,818 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 [2019-10-13 19:53:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 19:53:07,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-13 19:53:07,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 19:53:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-13 19:53:07,866 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2019-10-13 19:53:07,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:53:07,866 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-13 19:53:07,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 19:53:07,867 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-13 19:53:07,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 19:53:07,868 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:53:07,868 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:53:07,869 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:53:07,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:53:07,869 INFO L82 PathProgramCache]: Analyzing trace with hash -777624222, now seen corresponding path program 1 times [2019-10-13 19:53:07,870 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:53:07,870 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359111360] [2019-10-13 19:53:07,870 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:07,870 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:07,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:53:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:53:07,942 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 19:53:07,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359111360] [2019-10-13 19:53:07,945 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:53:07,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:53:07,945 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153897240] [2019-10-13 19:53:07,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:53:07,948 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:53:07,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:53:07,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:53:07,951 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-10-13 19:53:08,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:53:08,023 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-10-13 19:53:08,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:53:08,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-13 19:53:08,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:53:08,026 INFO L225 Difference]: With dead ends: 48 [2019-10-13 19:53:08,026 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 19:53:08,027 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 [2019-10-13 19:53:08,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 19:53:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-13 19:53:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 19:53:08,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-13 19:53:08,041 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2019-10-13 19:53:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:53:08,042 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-13 19:53:08,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:53:08,042 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-13 19:53:08,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 19:53:08,045 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:53:08,046 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:53:08,046 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:53:08,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:53:08,047 INFO L82 PathProgramCache]: Analyzing trace with hash 2101592964, now seen corresponding path program 1 times [2019-10-13 19:53:08,047 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:53:08,049 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416060900] [2019-10-13 19:53:08,049 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:08,049 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:08,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:53:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:53:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:53:08,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416060900] [2019-10-13 19:53:08,156 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:53:08,157 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:53:08,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768825294] [2019-10-13 19:53:08,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:53:08,162 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:53:08,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:53:08,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:53:08,162 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2019-10-13 19:53:08,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:53:08,226 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-10-13 19:53:08,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:53:08,227 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-13 19:53:08,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:53:08,228 INFO L225 Difference]: With dead ends: 46 [2019-10-13 19:53:08,228 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 19:53:08,229 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:53:08,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 19:53:08,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2019-10-13 19:53:08,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 19:53:08,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-13 19:53:08,238 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2019-10-13 19:53:08,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:53:08,238 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-13 19:53:08,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:53:08,238 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-13 19:53:08,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 19:53:08,239 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:53:08,240 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] [2019-10-13 19:53:08,240 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:53:08,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:53:08,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1818591568, now seen corresponding path program 1 times [2019-10-13 19:53:08,241 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:53:08,241 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551296192] [2019-10-13 19:53:08,241 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:08,241 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:08,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:53:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:53:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:53:08,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551296192] [2019-10-13 19:53:08,339 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:53:08,339 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:53:08,340 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337862471] [2019-10-13 19:53:08,340 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:53:08,341 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:53:08,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:53:08,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:53:08,342 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2019-10-13 19:53:08,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:53:08,459 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2019-10-13 19:53:08,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:53:08,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-13 19:53:08,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:53:08,462 INFO L225 Difference]: With dead ends: 62 [2019-10-13 19:53:08,462 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 19:53:08,463 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:53:08,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 19:53:08,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-10-13 19:53:08,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 19:53:08,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-10-13 19:53:08,477 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2019-10-13 19:53:08,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:53:08,478 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-10-13 19:53:08,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:53:08,479 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-10-13 19:53:08,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 19:53:08,481 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:53:08,481 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:53:08,481 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:53:08,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:53:08,482 INFO L82 PathProgramCache]: Analyzing trace with hash 334453631, now seen corresponding path program 1 times [2019-10-13 19:53:08,482 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:53:08,483 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347830005] [2019-10-13 19:53:08,483 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:08,483 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:08,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:53:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:53:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:53:08,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347830005] [2019-10-13 19:53:08,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10620538] [2019-10-13 19:53:08,618 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 19:53:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:53:08,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 19:53:08,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:53:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:53:08,785 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 19:53:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:53:08,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1212778566] [2019-10-13 19:53:08,847 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 27 [2019-10-13 19:53:08,906 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 19:53:08,907 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 19:53:08,976 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 19:53:08,977 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 0. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 27 variables. [2019-10-13 19:53:08,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:53:08,981 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 19:53:09,012 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-10-13 19:53:09,013 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 19:53:09,014 INFO L553 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2019-10-13 19:53:09,014 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 19:53:09,015 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 19:53:09,015 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7, 5, 5] total 13 [2019-10-13 19:53:09,015 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004560886] [2019-10-13 19:53:09,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 19:53:09,017 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 19:53:09,017 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 19:53:09,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 19:53:09,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:53:09,018 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 2 states. [2019-10-13 19:53:09,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:53:09,020 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2019-10-13 19:53:09,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 19:53:09,020 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2019-10-13 19:53:09,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:53:09,020 INFO L225 Difference]: With dead ends: 33 [2019-10-13 19:53:09,020 INFO L226 Difference]: Without dead ends: 0 [2019-10-13 19:53:09,021 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:53:09,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-13 19:53:09,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-13 19:53:09,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-13 19:53:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-13 19:53:09,022 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2019-10-13 19:53:09,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:53:09,022 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-13 19:53:09,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 19:53:09,023 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-13 19:53:09,023 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-13 19:53:09,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:53:09,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-13 19:53:09,265 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-13 19:53:09,265 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-10-13 19:53:09,266 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-13 19:53:09,266 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-13 19:53:09,266 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-13 19:53:09,266 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-13 19:53:09,266 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-13 19:53:09,266 INFO L439 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: false [2019-10-13 19:53:09,267 INFO L443 ceAbstractionStarter]: For program point L27-1(line 27) no Hoare annotation was computed. [2019-10-13 19:53:09,267 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 5 32) no Hoare annotation was computed. [2019-10-13 19:53:09,267 INFO L443 ceAbstractionStarter]: For program point L16-2(lines 16 20) no Hoare annotation was computed. [2019-10-13 19:53:09,267 INFO L439 ceAbstractionStarter]: At program point L16-3(lines 16 20) the Hoare annotation is: false [2019-10-13 19:53:09,270 INFO L443 ceAbstractionStarter]: For program point L25-2(lines 25 29) no Hoare annotation was computed. [2019-10-13 19:53:09,270 INFO L439 ceAbstractionStarter]: At program point L25-3(lines 25 29) the Hoare annotation is: false [2019-10-13 19:53:09,271 INFO L443 ceAbstractionStarter]: For program point L17(lines 17 19) no Hoare annotation was computed. [2019-10-13 19:53:09,271 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 5 32) no Hoare annotation was computed. [2019-10-13 19:53:09,271 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 5 32) the Hoare annotation is: true [2019-10-13 19:53:09,271 INFO L443 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2019-10-13 19:53:09,271 INFO L439 ceAbstractionStarter]: At program point L26-3(lines 26 28) the Hoare annotation is: false [2019-10-13 19:53:09,271 INFO L443 ceAbstractionStarter]: For program point L22(lines 22 30) no Hoare annotation was computed. [2019-10-13 19:53:09,271 INFO L443 ceAbstractionStarter]: For program point L14-2(lines 14 21) no Hoare annotation was computed. [2019-10-13 19:53:09,272 INFO L439 ceAbstractionStarter]: At program point L14-3(lines 14 21) the Hoare annotation is: false [2019-10-13 19:53:09,272 INFO L443 ceAbstractionStarter]: For program point L14-4(lines 5 32) no Hoare annotation was computed. [2019-10-13 19:53:09,272 INFO L443 ceAbstractionStarter]: For program point L10-2(lines 10 13) no Hoare annotation was computed. [2019-10-13 19:53:09,272 INFO L439 ceAbstractionStarter]: At program point L10-3(lines 10 13) the Hoare annotation is: false [2019-10-13 19:53:09,277 INFO L443 ceAbstractionStarter]: For program point L10-4(lines 10 13) no Hoare annotation was computed. [2019-10-13 19:53:09,277 INFO L443 ceAbstractionStarter]: For program point L2-1(line 2) no Hoare annotation was computed. [2019-10-13 19:53:09,278 INFO L443 ceAbstractionStarter]: For program point L2-3(line 2) no Hoare annotation was computed. [2019-10-13 19:53:09,278 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2019-10-13 19:53:09,278 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2019-10-13 19:53:09,278 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2019-10-13 19:53:09,278 INFO L443 ceAbstractionStarter]: For program point L2(line 2) no Hoare annotation was computed. [2019-10-13 19:53:09,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:53:09 BoogieIcfgContainer [2019-10-13 19:53:09,292 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 19:53:09,296 INFO L168 Benchmark]: Toolchain (without parser) took 2549.49 ms. Allocated memory was 146.3 MB in the beginning and 233.8 MB in the end (delta: 87.6 MB). Free memory was 102.7 MB in the beginning and 174.7 MB in the end (delta: -71.9 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. [2019-10-13 19:53:09,298 INFO L168 Benchmark]: CDTParser took 1.19 ms. Allocated memory is still 146.3 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 19:53:09,300 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.75 ms. Allocated memory was 146.3 MB in the beginning and 204.5 MB in the end (delta: 58.2 MB). Free memory was 102.5 MB in the beginning and 183.8 MB in the end (delta: -81.3 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2019-10-13 19:53:09,301 INFO L168 Benchmark]: Boogie Preprocessor took 44.64 ms. Allocated memory is still 204.5 MB. Free memory was 183.8 MB in the beginning and 181.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-10-13 19:53:09,302 INFO L168 Benchmark]: RCFGBuilder took 365.04 ms. Allocated memory is still 204.5 MB. Free memory was 181.5 MB in the beginning and 165.3 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2019-10-13 19:53:09,304 INFO L168 Benchmark]: TraceAbstraction took 1787.50 ms. Allocated memory was 204.5 MB in the beginning and 233.8 MB in the end (delta: 29.4 MB). Free memory was 165.3 MB in the beginning and 174.7 MB in the end (delta: -9.3 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2019-10-13 19:53:09,313 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.19 ms. Allocated memory is still 146.3 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 347.75 ms. Allocated memory was 146.3 MB in the beginning and 204.5 MB in the end (delta: 58.2 MB). Free memory was 102.5 MB in the beginning and 183.8 MB in the end (delta: -81.3 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.64 ms. Allocated memory is still 204.5 MB. Free memory was 183.8 MB in the beginning and 181.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 365.04 ms. Allocated memory is still 204.5 MB. Free memory was 181.5 MB in the beginning and 165.3 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1787.50 ms. Allocated memory was 204.5 MB in the beginning and 233.8 MB in the end (delta: 29.4 MB). Free memory was 165.3 MB in the beginning and 174.7 MB in the end (delta: -9.3 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: 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: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 32 locations, 1 error locations. Result: SAFE, OverallTime: 1.7s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 129 SDtfs, 18 SDslu, 128 SDs, 0 SdLazy, 84 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=4, 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, 5 MinimizatonAttempts, 14 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 15 PreInvPairs, 15 NumberOfFragments, 11 HoareAnnotationTreeSize, 15 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 123 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 142 ConstructedInterpolants, 0 QuantifiedInterpolants, 4822 SizeOfPredicates, 1 NumberOfNonLiveVariables, 94 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 12/21 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 135, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 0.96, AVG_VARS_REMOVED_DURING_WEAKENING: 0.88, AVG_WEAKENED_CONJUNCTS: 0.24, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...