java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:01:45,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:01:45,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:01:45,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:01:45,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:01:45,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:01:45,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:01:45,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:01:45,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:01:45,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:01:45,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:01:45,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:01:45,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:01:45,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:01:45,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:01:45,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:01:45,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:01:45,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:01:45,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:01:45,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:01:45,355 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 01:01:45,390 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:01:45,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:01:45,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:01:45,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:01:45,394 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:01:45,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:01:45,394 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:01:45,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:01:45,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:01:45,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:01:45,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:01:45,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:01:45,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:01:45,396 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:01:45,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:01:45,397 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:01:45,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:01:45,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:01:45,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:01:45,397 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:01:45,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:01:45,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:01:45,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:01:45,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:01:45,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:01:45,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:01:45,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:01:45,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:01:45,399 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 01:01:45,649 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:01:45,662 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:01:45,666 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:01:45,667 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:01:45,668 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:01:45,668 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2019-10-15 01:01:45,741 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7acbbb6f6/335ab3324dea4af2b89cecb0472907b6/FLAGdf81f86be [2019-10-15 01:01:46,181 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:01:46,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2019-10-15 01:01:46,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7acbbb6f6/335ab3324dea4af2b89cecb0472907b6/FLAGdf81f86be [2019-10-15 01:01:46,587 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7acbbb6f6/335ab3324dea4af2b89cecb0472907b6 [2019-10-15 01:01:46,596 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:01:46,598 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:01:46,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:01:46,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:01:46,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:01:46,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:01:46" (1/1) ... [2019-10-15 01:01:46,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5171f16b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:46, skipping insertion in model container [2019-10-15 01:01:46,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:01:46" (1/1) ... [2019-10-15 01:01:46,614 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:01:46,627 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:01:46,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:01:46,799 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:01:46,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:01:46,827 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:01:46,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:46 WrapperNode [2019-10-15 01:01:46,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:01:46,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:01:46,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:01:46,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:01:46,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:46" (1/1) ... [2019-10-15 01:01:46,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:46" (1/1) ... [2019-10-15 01:01:46,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:46" (1/1) ... [2019-10-15 01:01:46,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:46" (1/1) ... [2019-10-15 01:01:46,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:46" (1/1) ... [2019-10-15 01:01:46,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:46" (1/1) ... [2019-10-15 01:01:46,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:46" (1/1) ... [2019-10-15 01:01:46,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:01:46,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:01:46,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:01:46,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:01:46,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:01:46,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:01:46,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:01:46,983 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2019-10-15 01:01:46,983 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:01:46,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:01:46,984 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2019-10-15 01:01:46,984 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:01:46,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:01:46,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:01:47,116 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:01:47,117 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:01:47,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:01:47 BoogieIcfgContainer [2019-10-15 01:01:47,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:01:47,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:01:47,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:01:47,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:01:47,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:01:46" (1/3) ... [2019-10-15 01:01:47,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c24d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:01:47, skipping insertion in model container [2019-10-15 01:01:47,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:46" (2/3) ... [2019-10-15 01:01:47,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c24d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:01:47, skipping insertion in model container [2019-10-15 01:01:47,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:01:47" (3/3) ... [2019-10-15 01:01:47,126 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.c_1.i [2019-10-15 01:01:47,135 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:01:47,142 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:01:47,153 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:01:47,177 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:01:47,177 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:01:47,177 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:01:47,177 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:01:47,177 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:01:47,178 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:01:47,178 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:01:47,178 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:01:47,195 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-10-15 01:01:47,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-15 01:01:47,200 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:01:47,200 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:01:47,202 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:01:47,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:01:47,208 INFO L82 PathProgramCache]: Analyzing trace with hash 676687463, now seen corresponding path program 1 times [2019-10-15 01:01:47,214 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:01:47,214 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356376601] [2019-10-15 01:01:47,215 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:01:47,215 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:01:47,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:01:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:01:47,339 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 01:01:47,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356376601] [2019-10-15 01:01:47,341 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:01:47,341 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:01:47,341 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887126836] [2019-10-15 01:01:47,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:01:47,348 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:01:47,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:01:47,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:01:47,407 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 4 states. [2019-10-15 01:01:47,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:01:47,480 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2019-10-15 01:01:47,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:01:47,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-10-15 01:01:47,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:01:47,490 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:01:47,491 INFO L226 Difference]: Without dead ends: 13 [2019-10-15 01:01:47,494 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 01:01:47,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-15 01:01:47,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-10-15 01:01:47,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-15 01:01:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-15 01:01:47,545 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2019-10-15 01:01:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:01:47,546 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-15 01:01:47,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:01:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-15 01:01:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:01:47,549 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:01:47,550 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:01:47,550 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:01:47,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:01:47,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1754257002, now seen corresponding path program 1 times [2019-10-15 01:01:47,553 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:01:47,554 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370947188] [2019-10-15 01:01:47,554 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:01:47,554 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:01:47,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:01:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:01:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:01:47,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370947188] [2019-10-15 01:01:47,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967573336] [2019-10-15 01:01:47,656 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 01:01:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:01:47,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:01:47,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:01:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:01:47,747 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:01:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:01:47,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [751869766] [2019-10-15 01:01:47,784 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 12 [2019-10-15 01:01:47,820 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:01:47,820 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:01:47,964 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:01:47,968 INFO L272 AbstractInterpreter]: Visited 10 different actions 16 times. Merged at 2 different actions 4 times. Never widened. Performed 27 root evaluator evaluations with a maximum evaluation depth of 4. Performed 27 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2019-10-15 01:01:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:01:47,975 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:01:47,975 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:01:47,976 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2019-10-15 01:01:47,976 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649833225] [2019-10-15 01:01:47,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:01:47,979 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:01:47,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:01:47,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:01:47,980 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2019-10-15 01:01:48,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:01:48,008 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-10-15 01:01:48,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:01:48,009 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-10-15 01:01:48,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:01:48,010 INFO L225 Difference]: With dead ends: 18 [2019-10-15 01:01:48,010 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 01:01:48,011 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:01:48,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 01:01:48,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-10-15 01:01:48,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-15 01:01:48,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-15 01:01:48,016 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2019-10-15 01:01:48,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:01:48,016 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-15 01:01:48,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:01:48,017 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-15 01:01:48,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:01:48,018 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:01:48,018 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:01:48,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:01:48,220 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:01:48,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:01:48,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2083501651, now seen corresponding path program 2 times [2019-10-15 01:01:48,222 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:01:48,222 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903732826] [2019-10-15 01:01:48,223 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:01:48,223 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:01:48,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:01:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 01:01:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 01:01:48,261 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-15 01:01:48,261 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-15 01:01:48,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 01:01:48 BoogieIcfgContainer [2019-10-15 01:01:48,280 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 01:01:48,285 INFO L168 Benchmark]: Toolchain (without parser) took 1683.90 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 102.9 MB in the beginning and 124.3 MB in the end (delta: -21.4 MB). Peak memory consumption was 41.5 MB. Max. memory is 7.1 GB. [2019-10-15 01:01:48,286 INFO L168 Benchmark]: CDTParser took 1.18 ms. Allocated memory is still 139.5 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-10-15 01:01:48,288 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.61 ms. Allocated memory is still 139.5 MB. Free memory was 102.7 MB in the beginning and 93.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-10-15 01:01:48,290 INFO L168 Benchmark]: Boogie Preprocessor took 96.65 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 93.5 MB in the beginning and 181.3 MB in the end (delta: -87.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2019-10-15 01:01:48,291 INFO L168 Benchmark]: RCFGBuilder took 193.42 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 171.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2019-10-15 01:01:48,292 INFO L168 Benchmark]: TraceAbstraction took 1161.10 ms. Allocated memory is still 202.4 MB. Free memory was 170.7 MB in the beginning and 124.3 MB in the end (delta: 46.4 MB). Peak memory consumption was 46.4 MB. Max. memory is 7.1 GB. [2019-10-15 01:01:48,302 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.18 ms. Allocated memory is still 139.5 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 228.61 ms. Allocated memory is still 139.5 MB. Free memory was 102.7 MB in the beginning and 93.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 96.65 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 93.5 MB in the beginning and 181.3 MB in the end (delta: -87.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 193.42 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 171.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1161.10 ms. Allocated memory is still 202.4 MB. Free memory was 170.7 MB in the beginning and 124.3 MB in the end (delta: 46.4 MB). Peak memory consumption was 46.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i=0; VAL [i=0] [L13] COND TRUE i<5 [L14] i++ VAL [i=1] [L16] (i!=3) ? (0) : __blast_assert () VAL [i=1] [L13] COND TRUE i<5 [L14] i++ VAL [i=2] [L16] (i!=3) ? (0) : __blast_assert () VAL [i=2] [L13] COND TRUE i<5 [L14] i++ VAL [i=3] [L16] (i!=3) ? (0) : __blast_assert () VAL [i=3] [L16] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 3 SDslu, 38 SDs, 0 SdLazy, 21 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 636 SizeOfPredicates, 1 NumberOfNonLiveVariables, 25 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...