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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 02:56:30,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 02:56:30,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 02:56:30,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 02:56:30,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 02:56:30,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 02:56:30,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 02:56:30,883 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 02:56:30,896 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 02:56:30,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 02:56:30,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 02:56:30,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 02:56:30,898 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 02:56:30,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 02:56:30,898 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 02:56:30,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 02:56:30,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 02:56:30,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 02:56:30,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 02:56:30,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 02:56:30,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 02:56:30,900 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 02:56:30,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 02:56:30,900 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 02:56:30,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 02:56:30,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 02:56:30,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 02:56:30,901 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 02:56:30,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 02:56:30,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 02:56:30,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 02:56:30,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 02:56:30,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 02:56:30,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 02:56:30,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 02:56:30,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 02:56:30,903 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 02:56:31,171 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 02:56:31,185 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 02:56:31,191 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 02:56:31,193 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 02:56:31,193 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 02:56:31,194 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-10-15 02:56:31,255 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de4ce4ef8/21b2cf42adc7477181a17496dd0291d0/FLAG08974b0b6 [2019-10-15 02:56:31,689 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 02:56:31,690 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-10-15 02:56:31,697 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de4ce4ef8/21b2cf42adc7477181a17496dd0291d0/FLAG08974b0b6 [2019-10-15 02:56:32,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de4ce4ef8/21b2cf42adc7477181a17496dd0291d0 [2019-10-15 02:56:32,106 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 02:56:32,108 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 02:56:32,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 02:56:32,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 02:56:32,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 02:56:32,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:56:32" (1/1) ... [2019-10-15 02:56:32,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13c5ffca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:32, skipping insertion in model container [2019-10-15 02:56:32,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:56:32" (1/1) ... [2019-10-15 02:56:32,125 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 02:56:32,144 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 02:56:32,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:56:32,312 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 02:56:32,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:56:32,343 INFO L192 MainTranslator]: Completed translation [2019-10-15 02:56:32,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:32 WrapperNode [2019-10-15 02:56:32,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 02:56:32,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 02:56:32,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 02:56:32,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 02:56:32,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:32" (1/1) ... [2019-10-15 02:56:32,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:32" (1/1) ... [2019-10-15 02:56:32,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:32" (1/1) ... [2019-10-15 02:56:32,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:32" (1/1) ... [2019-10-15 02:56:32,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:32" (1/1) ... [2019-10-15 02:56:32,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:32" (1/1) ... [2019-10-15 02:56:32,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:32" (1/1) ... [2019-10-15 02:56:32,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 02:56:32,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 02:56:32,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 02:56:32,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 02:56:32,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:32" (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 02:56:32,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 02:56:32,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 02:56:32,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2019-10-15 02:56:32,511 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2019-10-15 02:56:32,511 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 02:56:32,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 02:56:32,512 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2019-10-15 02:56:32,512 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2019-10-15 02:56:32,512 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 02:56:32,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 02:56:32,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 02:56:32,692 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 02:56:32,693 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 02:56:32,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:56:32 BoogieIcfgContainer [2019-10-15 02:56:32,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 02:56:32,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 02:56:32,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 02:56:32,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 02:56:32,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:56:32" (1/3) ... [2019-10-15 02:56:32,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c93a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:56:32, skipping insertion in model container [2019-10-15 02:56:32,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:32" (2/3) ... [2019-10-15 02:56:32,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c93a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:56:32, skipping insertion in model container [2019-10-15 02:56:32,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:56:32" (3/3) ... [2019-10-15 02:56:32,702 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2019-10-15 02:56:32,712 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 02:56:32,720 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 02:56:32,732 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 02:56:32,755 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 02:56:32,755 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 02:56:32,755 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 02:56:32,755 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 02:56:32,755 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 02:56:32,756 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 02:56:32,756 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 02:56:32,756 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 02:56:32,774 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-15 02:56:32,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 02:56:32,779 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:56:32,780 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:56:32,782 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:56:32,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:56:32,787 INFO L82 PathProgramCache]: Analyzing trace with hash 708560652, now seen corresponding path program 1 times [2019-10-15 02:56:32,795 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:56:32,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266219419] [2019-10-15 02:56:32,795 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:56:32,796 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:56:32,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:56:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:56:33,089 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 02:56:33,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266219419] [2019-10-15 02:56:33,090 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:56:33,091 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 02:56:33,091 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123089215] [2019-10-15 02:56:33,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 02:56:33,096 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:56:33,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 02:56:33,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 02:56:33,115 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 6 states. [2019-10-15 02:56:33,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:56:33,224 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2019-10-15 02:56:33,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 02:56:33,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-15 02:56:33,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:56:33,236 INFO L225 Difference]: With dead ends: 37 [2019-10-15 02:56:33,236 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 02:56:33,239 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 02:56:33,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 02:56:33,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-10-15 02:56:33,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 02:56:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-15 02:56:33,274 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2019-10-15 02:56:33,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:56:33,275 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-15 02:56:33,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 02:56:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-15 02:56:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 02:56:33,277 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:56:33,277 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:56:33,277 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:56:33,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:56:33,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1910985178, now seen corresponding path program 1 times [2019-10-15 02:56:33,278 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:56:33,279 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405853976] [2019-10-15 02:56:33,279 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:56:33,279 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:56:33,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:56:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:56:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:56:33,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405853976] [2019-10-15 02:56:33,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838453492] [2019-10-15 02:56:33,367 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 02:56:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:56:33,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 02:56:33,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:56:33,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:56:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:56:33,486 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:56:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:56:33,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1562856945] [2019-10-15 02:56:33,571 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 02:56:33,572 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:56:33,600 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:56:33,614 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:56:33,615 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:56:33,692 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 02:56:34,022 INFO L199 IcfgInterpreter]: Interpreting procedure check_error with input of size 6 for LOIs [2019-10-15 02:56:34,102 INFO L199 IcfgInterpreter]: Interpreting procedure __blast_assert with input of size 1 for LOIs [2019-10-15 02:56:34,111 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 02:56:34,117 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 02:56:34,397 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 02:56:34,397 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 16 [2019-10-15 02:56:34,397 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555587084] [2019-10-15 02:56:34,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-15 02:56:34,400 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:56:34,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-15 02:56:34,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2019-10-15 02:56:34,402 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 16 states. [2019-10-15 02:56:34,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:56:34,573 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2019-10-15 02:56:34,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 02:56:34,573 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2019-10-15 02:56:34,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:56:34,575 INFO L225 Difference]: With dead ends: 28 [2019-10-15 02:56:34,575 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 02:56:34,576 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2019-10-15 02:56:34,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 02:56:34,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-15 02:56:34,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 02:56:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-15 02:56:34,586 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 17 [2019-10-15 02:56:34,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:56:34,586 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-15 02:56:34,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-15 02:56:34,586 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-15 02:56:34,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 02:56:34,588 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:56:34,588 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:56:34,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:56:34,793 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:56:34,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:56:34,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1165555160, now seen corresponding path program 2 times [2019-10-15 02:56:34,793 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:56:34,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228957753] [2019-10-15 02:56:34,795 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:56:34,795 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:56:34,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:56:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 02:56:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 02:56:34,832 INFO L168 tionRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-10-15 02:56:34,832 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-15 02:56:34,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 02:56:34 BoogieIcfgContainer [2019-10-15 02:56:34,857 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 02:56:34,860 INFO L168 Benchmark]: Toolchain (without parser) took 2751.73 ms. Allocated memory was 136.3 MB in the beginning and 228.6 MB in the end (delta: 92.3 MB). Free memory was 101.6 MB in the beginning and 158.0 MB in the end (delta: -56.3 MB). Peak memory consumption was 35.9 MB. Max. memory is 7.1 GB. [2019-10-15 02:56:34,861 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 136.3 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-15 02:56:34,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.61 ms. Allocated memory is still 136.3 MB. Free memory was 101.4 MB in the beginning and 92.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-10-15 02:56:34,863 INFO L168 Benchmark]: Boogie Preprocessor took 117.48 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 92.1 MB in the beginning and 179.0 MB in the end (delta: -86.8 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2019-10-15 02:56:34,864 INFO L168 Benchmark]: RCFGBuilder took 232.30 ms. Allocated memory is still 199.8 MB. Free memory was 179.0 MB in the beginning and 167.1 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2019-10-15 02:56:34,865 INFO L168 Benchmark]: TraceAbstraction took 2162.19 ms. Allocated memory was 199.8 MB in the beginning and 228.6 MB in the end (delta: 28.8 MB). Free memory was 166.4 MB in the beginning and 158.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 37.3 MB. Max. memory is 7.1 GB. [2019-10-15 02:56:34,869 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 136.3 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 235.61 ms. Allocated memory is still 136.3 MB. Free memory was 101.4 MB in the beginning and 92.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.48 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 92.1 MB in the beginning and 179.0 MB in the end (delta: -86.8 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 232.30 ms. Allocated memory is still 199.8 MB. Free memory was 179.0 MB in the beginning and 167.1 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2162.19 ms. Allocated memory was 199.8 MB in the beginning and 228.6 MB in the end (delta: 28.8 MB). Free memory was 166.4 MB in the beginning and 158.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 37.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i=0; VAL [i=0] [L24] COND TRUE i<5 [L25] i++ VAL [i=1] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=1] [L24] COND TRUE i<5 [L25] i++ VAL [i=2] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=2] [L24] COND TRUE i<5 [L25] i++ VAL [i=3] [L29] CALL check_error(i!=3) VAL [\old(b)=0] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=0, b=0] [L18] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 18 locations, 1 error locations. Result: UNSAFE, OverallTime: 2.1s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 17 SDslu, 136 SDs, 0 SdLazy, 98 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 1624 SizeOfPredicates, 2 NumberOfNonLiveVariables, 39 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 546, ICFG_INTERPRETER_ENTERED_PROCEDURES: 5, DAG_INTERPRETER_EARLY_EXIT_QUERIES: 40, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 15, TOOLS_POST_TIME[ms]: 10, TOOLS_POST_CALL_APPLICATIONS: 14, TOOLS_POST_CALL_TIME[ms]: 33, TOOLS_POST_RETURN_APPLICATIONS: 10, TOOLS_POST_RETURN_TIME[ms]: 15, TOOLS_QUANTIFIERELIM_APPLICATIONS: 39, TOOLS_QUANTIFIERELIM_TIME[ms]: 39, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 8, FLUID_QUERY_TIME[ms]: 4, FLUID_QUERIES: 43, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 27, DOMAIN_JOIN_TIME[ms]: 272, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 56, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 11, DOMAIN_ISBOTTOM_APPLICATIONS: 6, DOMAIN_ISBOTTOM_TIME[ms]: 28, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 257, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 257, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 10, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME[ms]: 18, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 17, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 12, PATH_EXPR_TIME[ms]: 4, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 19, DAG_COMPRESSION_PROCESSED_NODES: 82, DAG_COMPRESSION_RETAINED_NODES: 57, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...