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/loops/while_infinite_loop_2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:00:28,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:00:28,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:00:28,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:00:28,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:00:28,060 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:00:28,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:00:28,070 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:00:28,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:00:28,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:00:28,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:00:28,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:00:28,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:00:28,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:00:28,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:00:28,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:00:28,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:00:28,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:00:28,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:00:28,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:00:28,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:00:28,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:00:28,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:00:28,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:00:28,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 23:00:28,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:00:28,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:00:28,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:00:28,121 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 23:00:28,153 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:00:28,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:00:28,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:00:28,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:00:28,158 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:00:28,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:00:28,158 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:00:28,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:00:28,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:00:28,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:00:28,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:00:28,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:00:28,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:00:28,161 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:00:28,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:00:28,161 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:00:28,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:00:28,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:00:28,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:00:28,162 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:00:28,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:00:28,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:00:28,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:00:28,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:00:28,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:00:28,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:00:28,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:00:28,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:00:28,164 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 [2019-10-13 23:00:28,429 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:00:28,443 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:00:28,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:00:28,448 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:00:28,448 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:00:28,449 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_2.c [2019-10-13 23:00:28,516 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c35d32636/b3ef83ccbb224c85a848d931181fcb33/FLAG5260e0897 [2019-10-13 23:00:28,964 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:00:28,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_2.c [2019-10-13 23:00:28,971 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c35d32636/b3ef83ccbb224c85a848d931181fcb33/FLAG5260e0897 [2019-10-13 23:00:29,355 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c35d32636/b3ef83ccbb224c85a848d931181fcb33 [2019-10-13 23:00:29,365 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:00:29,366 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:00:29,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:00:29,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:00:29,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:00:29,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:00:29" (1/1) ... [2019-10-13 23:00:29,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b0f51fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:29, skipping insertion in model container [2019-10-13 23:00:29,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:00:29" (1/1) ... [2019-10-13 23:00:29,382 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:00:29,397 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:00:29,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:00:29,589 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:00:29,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:00:29,614 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:00:29,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:29 WrapperNode [2019-10-13 23:00:29,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:00:29,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:00:29,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:00:29,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:00:29,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:29" (1/1) ... [2019-10-13 23:00:29,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:29" (1/1) ... [2019-10-13 23:00:29,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:29" (1/1) ... [2019-10-13 23:00:29,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:29" (1/1) ... [2019-10-13 23:00:29,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:29" (1/1) ... [2019-10-13 23:00:29,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:29" (1/1) ... [2019-10-13 23:00:29,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:29" (1/1) ... [2019-10-13 23:00:29,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:00:29,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:00:29,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:00:29,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:00:29,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:00:29,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:00:29,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:00:29,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 23:00:29,785 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:00:29,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:00:29,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 23:00:29,785 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:00:29,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:00:29,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:00:29,919 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:00:29,919 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 23:00:29,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:00:29 BoogieIcfgContainer [2019-10-13 23:00:29,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:00:29,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:00:29,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:00:29,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:00:29,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:00:29" (1/3) ... [2019-10-13 23:00:29,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e32552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:00:29, skipping insertion in model container [2019-10-13 23:00:29,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:29" (2/3) ... [2019-10-13 23:00:29,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e32552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:00:29, skipping insertion in model container [2019-10-13 23:00:29,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:00:29" (3/3) ... [2019-10-13 23:00:29,929 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_2.c [2019-10-13 23:00:29,938 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:00:29,946 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:00:29,958 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:00:29,983 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:00:29,983 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:00:29,983 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:00:29,983 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:00:29,983 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:00:29,984 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:00:29,984 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:00:29,984 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:00:30,002 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-13 23:00:30,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 23:00:30,009 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:30,010 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:30,012 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:30,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:30,018 INFO L82 PathProgramCache]: Analyzing trace with hash 10926999, now seen corresponding path program 1 times [2019-10-13 23:00:30,027 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:30,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466209146] [2019-10-13 23:00:30,028 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:30,028 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:30,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:30,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466209146] [2019-10-13 23:00:30,121 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:30,121 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 23:00:30,121 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126715966] [2019-10-13 23:00:30,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 23:00:30,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:30,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 23:00:30,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:00:30,138 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2019-10-13 23:00:30,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:30,164 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-10-13 23:00:30,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 23:00:30,165 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-13 23:00:30,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:30,174 INFO L225 Difference]: With dead ends: 26 [2019-10-13 23:00:30,174 INFO L226 Difference]: Without dead ends: 13 [2019-10-13 23:00:30,177 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:00:30,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-13 23:00:30,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-13 23:00:30,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-13 23:00:30,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-13 23:00:30,214 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2019-10-13 23:00:30,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:30,214 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-13 23:00:30,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 23:00:30,215 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-13 23:00:30,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 23:00:30,215 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:30,216 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:30,216 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:30,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:30,217 INFO L82 PathProgramCache]: Analyzing trace with hash -13144129, now seen corresponding path program 1 times [2019-10-13 23:00:30,217 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:30,217 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508096481] [2019-10-13 23:00:30,217 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:30,218 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:30,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:30,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:30,386 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508096481] [2019-10-13 23:00:30,387 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:30,387 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 23:00:30,388 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348835360] [2019-10-13 23:00:30,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:00:30,390 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:30,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:00:30,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:00:30,391 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2019-10-13 23:00:30,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:30,452 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-10-13 23:00:30,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 23:00:30,453 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-13 23:00:30,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:30,454 INFO L225 Difference]: With dead ends: 13 [2019-10-13 23:00:30,454 INFO L226 Difference]: Without dead ends: 0 [2019-10-13 23:00:30,456 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 23:00:30,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-13 23:00:30,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-13 23:00:30,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-13 23:00:30,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-13 23:00:30,457 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2019-10-13 23:00:30,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:30,458 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-13 23:00:30,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:00:30,458 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-13 23:00:30,459 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-13 23:00:30,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-13 23:00:30,499 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-13 23:00:30,499 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-13 23:00:30,499 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-13 23:00:30,500 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-13 23:00:30,500 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-13 23:00:30,500 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-13 23:00:30,500 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 9 18) the Hoare annotation is: true [2019-10-13 23:00:30,501 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 9 18) no Hoare annotation was computed. [2019-10-13 23:00:30,501 INFO L439 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (= main_~x~0 0) [2019-10-13 23:00:30,501 INFO L439 ceAbstractionStarter]: At program point L14-1(lines 12 15) the Hoare annotation is: (= main_~x~0 0) [2019-10-13 23:00:30,502 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 9 18) no Hoare annotation was computed. [2019-10-13 23:00:30,503 INFO L439 ceAbstractionStarter]: At program point L12-2(lines 12 15) the Hoare annotation is: false [2019-10-13 23:00:30,504 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-13 23:00:30,504 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-13 23:00:30,504 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-13 23:00:30,505 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-13 23:00:30,505 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-13 23:00:30,505 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-13 23:00:30,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 11:00:30 BoogieIcfgContainer [2019-10-13 23:00:30,526 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 23:00:30,532 INFO L168 Benchmark]: Toolchain (without parser) took 1164.52 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 104.1 MB in the beginning and 142.0 MB in the end (delta: -37.9 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2019-10-13 23:00:30,534 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 23:00:30,536 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.45 ms. Allocated memory is still 139.5 MB. Free memory was 103.7 MB in the beginning and 94.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2019-10-13 23:00:30,538 INFO L168 Benchmark]: Boogie Preprocessor took 117.05 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 94.7 MB in the beginning and 182.7 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2019-10-13 23:00:30,539 INFO L168 Benchmark]: RCFGBuilder took 188.40 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 172.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2019-10-13 23:00:30,541 INFO L168 Benchmark]: TraceAbstraction took 606.64 ms. Allocated memory is still 203.9 MB. Free memory was 172.2 MB in the beginning and 142.0 MB in the end (delta: 30.2 MB). Peak memory consumption was 30.2 MB. Max. memory is 7.1 GB. [2019-10-13 23:00:30,551 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 139.5 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 247.45 ms. Allocated memory is still 139.5 MB. Free memory was 103.7 MB in the beginning and 94.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.05 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 94.7 MB in the beginning and 182.7 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 188.40 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 172.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 606.64 ms. Allocated memory is still 203.9 MB. Free memory was 172.2 MB in the beginning and 142.0 MB in the end (delta: 30.2 MB). Peak memory consumption was 30.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: x == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Result: SAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 5 SDslu, 19 SDs, 0 SdLazy, 7 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 10 PreInvPairs, 12 NumberOfFragments, 12 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 252 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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 correct! Received shutdown request...