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/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:05:59,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:05:59,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:05:59,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:05:59,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:05:59,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:05:59,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:05:59,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:05:59,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:05:59,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:05:59,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:05:59,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:05:59,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:05:59,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:05:59,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:05:59,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:05:59,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:05:59,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:05:59,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:05:59,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:05:59,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:05:59,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:05:59,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:05:59,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:05:59,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:05:59,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:05:59,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:05:59,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:05:59,293 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 01:05:59,307 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:05:59,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:05:59,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:05:59,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:05:59,309 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:05:59,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:05:59,309 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:05:59,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:05:59,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:05:59,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:05:59,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:05:59,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:05:59,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:05:59,310 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:05:59,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:05:59,311 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:05:59,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:05:59,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:05:59,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:05:59,312 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:05:59,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:05:59,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:05:59,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:05:59,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:05:59,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:05:59,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:05:59,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:05:59,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:05:59,314 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 01:05:59,570 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:05:59,584 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:05:59,588 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:05:59,590 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:05:59,590 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:05:59,591 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-10-15 01:05:59,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daa5dc781/a220f1b038c0425aaadb01f9ecd87c3e/FLAGa5b044846 [2019-10-15 01:06:00,100 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:06:00,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-10-15 01:06:00,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daa5dc781/a220f1b038c0425aaadb01f9ecd87c3e/FLAGa5b044846 [2019-10-15 01:06:00,507 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daa5dc781/a220f1b038c0425aaadb01f9ecd87c3e [2019-10-15 01:06:00,517 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:06:00,519 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:06:00,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:06:00,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:06:00,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:06:00,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:06:00" (1/1) ... [2019-10-15 01:06:00,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3304fef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:00, skipping insertion in model container [2019-10-15 01:06:00,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:06:00" (1/1) ... [2019-10-15 01:06:00,535 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:06:00,553 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:06:00,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:06:00,721 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:06:00,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:06:00,751 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:06:00,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:00 WrapperNode [2019-10-15 01:06:00,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:06:00,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:06:00,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:06:00,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:06:00,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:00" (1/1) ... [2019-10-15 01:06:00,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:00" (1/1) ... [2019-10-15 01:06:00,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:00" (1/1) ... [2019-10-15 01:06:00,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:00" (1/1) ... [2019-10-15 01:06:00,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:00" (1/1) ... [2019-10-15 01:06:00,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:00" (1/1) ... [2019-10-15 01:06:00,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:00" (1/1) ... [2019-10-15 01:06:00,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:06:00,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:06:00,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:06:00,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:06:00,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:00" (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 01:06:00,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:06:00,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:06:00,931 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:06:00,931 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:06:00,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:06:00,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:06:00,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:06:00,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:06:00,932 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:06:00,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:06:00,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:06:01,122 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:06:01,122 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:06:01,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:06:01 BoogieIcfgContainer [2019-10-15 01:06:01,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:06:01,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:06:01,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:06:01,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:06:01,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:06:00" (1/3) ... [2019-10-15 01:06:01,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6828b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:06:01, skipping insertion in model container [2019-10-15 01:06:01,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:00" (2/3) ... [2019-10-15 01:06:01,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6828b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:06:01, skipping insertion in model container [2019-10-15 01:06:01,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:06:01" (3/3) ... [2019-10-15 01:06:01,132 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2019-10-15 01:06:01,142 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:06:01,151 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:06:01,163 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:06:01,211 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:06:01,211 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:06:01,211 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:06:01,212 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:06:01,212 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:06:01,215 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:06:01,216 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:06:01,216 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:06:01,261 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 01:06:01,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:06:01,269 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:01,270 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:01,272 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:01,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:01,280 INFO L82 PathProgramCache]: Analyzing trace with hash 429908039, now seen corresponding path program 1 times [2019-10-15 01:06:01,304 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:01,305 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179231883] [2019-10-15 01:06:01,305 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:01,306 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:01,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:01,551 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 01:06:01,551 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179231883] [2019-10-15 01:06:01,552 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:01,552 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:06:01,553 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940431874] [2019-10-15 01:06:01,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:06:01,558 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:01,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:06:01,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:06:01,572 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2019-10-15 01:06:01,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:01,765 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2019-10-15 01:06:01,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:06:01,767 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-15 01:06:01,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:01,778 INFO L225 Difference]: With dead ends: 50 [2019-10-15 01:06:01,778 INFO L226 Difference]: Without dead ends: 26 [2019-10-15 01:06:01,782 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:06:01,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-15 01:06:01,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-15 01:06:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:06:01,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-15 01:06:01,826 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2019-10-15 01:06:01,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:01,827 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-15 01:06:01,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:06:01,827 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-15 01:06:01,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:06:01,828 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:01,829 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:01,838 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:01,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:01,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1060899037, now seen corresponding path program 1 times [2019-10-15 01:06:01,839 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:01,839 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605151319] [2019-10-15 01:06:01,839 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:01,840 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:01,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:02,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605151319] [2019-10-15 01:06:02,091 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:02,091 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-15 01:06:02,091 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775304058] [2019-10-15 01:06:02,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:06:02,094 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:02,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:06:02,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:06:02,095 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2019-10-15 01:06:02,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:02,215 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-10-15 01:06:02,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:06:02,217 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-10-15 01:06:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:02,218 INFO L225 Difference]: With dead ends: 32 [2019-10-15 01:06:02,219 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 01:06:02,220 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:06:02,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 01:06:02,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-10-15 01:06:02,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 01:06:02,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-15 01:06:02,237 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 18 [2019-10-15 01:06:02,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:02,238 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-15 01:06:02,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:06:02,238 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-15 01:06:02,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:06:02,240 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:02,240 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:02,240 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:02,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:02,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1415691032, now seen corresponding path program 1 times [2019-10-15 01:06:02,242 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:02,243 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151953178] [2019-10-15 01:06:02,243 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:02,243 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:02,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 01:06:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 01:06:02,320 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-15 01:06:02,320 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-15 01:06:02,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 01:06:02 BoogieIcfgContainer [2019-10-15 01:06:02,346 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 01:06:02,349 INFO L168 Benchmark]: Toolchain (without parser) took 1828.78 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 103.3 MB in the beginning and 102.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 58.9 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:02,350 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 145.2 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-15 01:06:02,351 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.83 ms. Allocated memory is still 145.2 MB. Free memory was 103.1 MB in the beginning and 93.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:02,352 INFO L168 Benchmark]: Boogie Preprocessor took 129.35 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 93.2 MB in the beginning and 181.2 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:02,352 INFO L168 Benchmark]: RCFGBuilder took 242.37 ms. Allocated memory is still 202.9 MB. Free memory was 181.2 MB in the beginning and 169.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:02,353 INFO L168 Benchmark]: TraceAbstraction took 1220.77 ms. Allocated memory is still 202.9 MB. Free memory was 168.6 MB in the beginning and 102.1 MB in the end (delta: 66.5 MB). Peak memory consumption was 66.5 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:02,357 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 145.2 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 231.83 ms. Allocated memory is still 145.2 MB. Free memory was 103.1 MB in the beginning and 93.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.35 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 93.2 MB in the beginning and 181.2 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 242.37 ms. Allocated memory is still 202.9 MB. Free memory was 181.2 MB in the beginning and 169.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1220.77 ms. Allocated memory is still 202.9 MB. Free memory was 168.6 MB in the beginning and 102.1 MB in the end (delta: 66.5 MB). Peak memory consumption was 66.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int i=0, x=0, y=0; [L15] int n=__VERIFIER_nondet_int(); [L16] COND FALSE !(!(n>0)) [L17] i=0 VAL [i=0, n=1, x=0, y=0] [L17] COND TRUE i