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/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:00:13,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:00:13,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:00:13,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:00:13,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:00:13,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:00:13,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:00:13,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:00:13,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:00:13,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:00:13,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:00:13,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:00:13,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:00:13,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:00:13,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:00:13,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:00:13,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:00:13,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:00:13,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:00:13,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:00:13,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:00:13,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:00:13,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:00:13,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:00:13,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 23:00:13,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:00:13,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:00:13,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:00:13,871 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 23:00:13,892 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:00:13,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:00:13,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:00:13,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:00:13,897 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:00:13,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:00:13,897 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:00:13,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:00:13,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:00:13,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:00:13,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:00:13,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:00:13,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:00:13,900 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:00:13,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:00:13,900 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:00:13,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:00:13,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:00:13,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:00:13,902 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:00:13,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:00:13,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:00:13,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:00:13,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:00:13,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:00:13,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:00:13,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:00:13,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:00:13,907 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 23:00:14,175 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:00:14,193 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:00:14,197 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:00:14,198 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:00:14,199 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:00:14,199 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2019-10-13 23:00:14,266 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf22fe09b/8a9179c222694ab3a1e1c605acf25c25/FLAG8286d326f [2019-10-13 23:00:14,687 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:00:14,689 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2019-10-13 23:00:14,696 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf22fe09b/8a9179c222694ab3a1e1c605acf25c25/FLAG8286d326f [2019-10-13 23:00:15,083 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf22fe09b/8a9179c222694ab3a1e1c605acf25c25 [2019-10-13 23:00:15,094 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:00:15,096 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:00:15,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:00:15,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:00:15,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:00:15,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:00:15" (1/1) ... [2019-10-13 23:00:15,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32777701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:15, skipping insertion in model container [2019-10-13 23:00:15,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:00:15" (1/1) ... [2019-10-13 23:00:15,113 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:00:15,130 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:00:15,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:00:15,358 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:00:15,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:00:15,396 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:00:15,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:15 WrapperNode [2019-10-13 23:00:15,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:00:15,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:00:15,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:00:15,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:00:15,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:15" (1/1) ... [2019-10-13 23:00:15,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:15" (1/1) ... [2019-10-13 23:00:15,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:15" (1/1) ... [2019-10-13 23:00:15,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:15" (1/1) ... [2019-10-13 23:00:15,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:15" (1/1) ... [2019-10-13 23:00:15,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:15" (1/1) ... [2019-10-13 23:00:15,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:15" (1/1) ... [2019-10-13 23:00:15,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:00:15,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:00:15,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:00:15,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:00:15,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:15" (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 23:00:15,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:00:15,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:00:15,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 23:00:15,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:00:15,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:00:15,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 23:00:15,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:00:15,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:00:15,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:00:15,773 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:00:15,773 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 23:00:15,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:00:15 BoogieIcfgContainer [2019-10-13 23:00:15,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:00:15,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:00:15,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:00:15,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:00:15,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:00:15" (1/3) ... [2019-10-13 23:00:15,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3767d957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:00:15, skipping insertion in model container [2019-10-13 23:00:15,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:15" (2/3) ... [2019-10-13 23:00:15,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3767d957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:00:15, skipping insertion in model container [2019-10-13 23:00:15,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:00:15" (3/3) ... [2019-10-13 23:00:15,788 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2019-10-13 23:00:15,796 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:00:15,802 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:00:15,812 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:00:15,835 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:00:15,835 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:00:15,835 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:00:15,835 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:00:15,836 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:00:15,836 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:00:15,836 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:00:15,836 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:00:15,853 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-10-13 23:00:15,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 23:00:15,859 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:15,860 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:15,861 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:15,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:15,867 INFO L82 PathProgramCache]: Analyzing trace with hash -699336870, now seen corresponding path program 1 times [2019-10-13 23:00:15,877 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:15,878 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830775239] [2019-10-13 23:00:15,878 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:15,878 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:15,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:15,990 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 23:00:15,991 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830775239] [2019-10-13 23:00:15,992 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:15,993 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:00:16,001 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637370321] [2019-10-13 23:00:16,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:00:16,013 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:16,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:00:16,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:00:16,047 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-10-13 23:00:16,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:16,095 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-10-13 23:00:16,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:00:16,100 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-13 23:00:16,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:16,112 INFO L225 Difference]: With dead ends: 29 [2019-10-13 23:00:16,125 INFO L226 Difference]: Without dead ends: 12 [2019-10-13 23:00:16,129 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:00:16,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-13 23:00:16,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-13 23:00:16,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-13 23:00:16,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-13 23:00:16,185 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-13 23:00:16,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:16,186 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-13 23:00:16,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:00:16,186 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-13 23:00:16,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 23:00:16,187 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:16,187 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:16,187 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:16,188 INFO L82 PathProgramCache]: Analyzing trace with hash -228174086, now seen corresponding path program 1 times [2019-10-13 23:00:16,188 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:16,188 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490551411] [2019-10-13 23:00:16,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:16,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:16,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:16,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490551411] [2019-10-13 23:00:16,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896226145] [2019-10-13 23:00:16,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:16,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:00:16,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:16,298 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:16,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1460960318] [2019-10-13 23:00:16,371 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-13 23:00:16,372 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:00:16,378 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:00:16,387 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:00:16,388 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:00:16,458 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-13 23:00:16,731 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-13 23:00:16,768 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-13 23:00:16,778 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 23:00:16,779 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 23:00:16,780 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-13 23:00:16,780 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-13 23:00:16,780 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 109#true [2019-10-13 23:00:16,781 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 23:00:16,781 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 104#true [2019-10-13 23:00:16,782 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 95#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-13 23:00:16,782 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 85#(and (or (and (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) (and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0))) (or (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| 0))) [2019-10-13 23:00:16,783 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 90#(and (or (and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) (and (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1))) (or (and (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))) [2019-10-13 23:00:16,783 INFO L193 IcfgInterpreter]: Reachable states at location L13-4 satisfy 80#(and (<= 1 main_~i~0) (not (<= main_~i~0 8)) (<= 8 main_~i~0) (<= 0 main_~sn~0)) [2019-10-13 23:00:16,783 INFO L193 IcfgInterpreter]: Reachable states at location L13-3 satisfy 75#(and (<= 1 main_~i~0) (<= 0 main_~sn~0)) [2019-10-13 23:00:16,784 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 100#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-13 23:00:16,976 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 23:00:16,976 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 6] total 11 [2019-10-13 23:00:16,977 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166126680] [2019-10-13 23:00:16,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 23:00:16,980 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:16,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 23:00:16,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-13 23:00:16,981 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2019-10-13 23:00:17,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:17,119 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-10-13 23:00:17,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 23:00:17,119 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2019-10-13 23:00:17,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:17,120 INFO L225 Difference]: With dead ends: 20 [2019-10-13 23:00:17,120 INFO L226 Difference]: Without dead ends: 15 [2019-10-13 23:00:17,122 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-13 23:00:17,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-13 23:00:17,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-13 23:00:17,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-13 23:00:17,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-13 23:00:17,127 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2019-10-13 23:00:17,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:17,127 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-13 23:00:17,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 23:00:17,128 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-13 23:00:17,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 23:00:17,128 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:17,129 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:17,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:17,333 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:17,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:17,334 INFO L82 PathProgramCache]: Analyzing trace with hash -528752806, now seen corresponding path program 2 times [2019-10-13 23:00:17,335 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:17,335 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494266682] [2019-10-13 23:00:17,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:17,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:17,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:17,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494266682] [2019-10-13 23:00:17,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345598862] [2019-10-13 23:00:17,404 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:17,445 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 23:00:17,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 23:00:17,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 23:00:17,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:17,454 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:17,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1651734389] [2019-10-13 23:00:17,548 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-13 23:00:17,549 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:00:17,550 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:00:17,550 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:00:17,550 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:00:17,570 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-13 23:00:17,684 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-13 23:00:17,715 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-13 23:00:17,718 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 23:00:17,718 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 23:00:17,719 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-13 23:00:17,719 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-13 23:00:17,719 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 106#true [2019-10-13 23:00:17,719 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 23:00:17,720 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 101#true [2019-10-13 23:00:17,721 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 92#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-13 23:00:17,721 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 82#(and (or (and (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) (and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0))) (or (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| 1))) [2019-10-13 23:00:17,721 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 87#(and (or (and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) (and (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1))) (or (and (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)))) [2019-10-13 23:00:17,721 INFO L193 IcfgInterpreter]: Reachable states at location L13-4 satisfy 77#(and (<= 1 main_~i~0) (not (<= main_~i~0 8)) (<= 8 main_~i~0) (<= 0 main_~sn~0)) [2019-10-13 23:00:17,722 INFO L193 IcfgInterpreter]: Reachable states at location L13-3 satisfy 72#(and (<= 1 main_~i~0) (<= 0 main_~sn~0)) [2019-10-13 23:00:17,722 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 97#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) [2019-10-13 23:00:17,860 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 23:00:17,860 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 6] total 15 [2019-10-13 23:00:17,861 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002619480] [2019-10-13 23:00:17,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 23:00:17,862 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:17,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 23:00:17,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2019-10-13 23:00:17,863 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2019-10-13 23:00:18,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:18,017 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-10-13 23:00:18,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 23:00:18,018 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2019-10-13 23:00:18,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:18,019 INFO L225 Difference]: With dead ends: 24 [2019-10-13 23:00:18,019 INFO L226 Difference]: Without dead ends: 19 [2019-10-13 23:00:18,020 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2019-10-13 23:00:18,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-13 23:00:18,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-13 23:00:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-13 23:00:18,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-10-13 23:00:18,025 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2019-10-13 23:00:18,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:18,025 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-10-13 23:00:18,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 23:00:18,026 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-10-13 23:00:18,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 23:00:18,026 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:18,027 INFO L380 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:18,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:18,233 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:18,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:18,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1963800742, now seen corresponding path program 3 times [2019-10-13 23:00:18,234 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:18,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362538989] [2019-10-13 23:00:18,234 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:18,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:18,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 23:00:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 23:00:18,316 INFO L168 tionRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-10-13 23:00:18,316 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-13 23:00:18,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 11:00:18 BoogieIcfgContainer [2019-10-13 23:00:18,338 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 23:00:18,341 INFO L168 Benchmark]: Toolchain (without parser) took 3244.53 ms. Allocated memory was 147.3 MB in the beginning and 232.8 MB in the end (delta: 85.5 MB). Free memory was 103.8 MB in the beginning and 116.3 MB in the end (delta: -12.5 MB). Peak memory consumption was 73.0 MB. Max. memory is 7.1 GB. [2019-10-13 23:00:18,342 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 147.3 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 23:00:18,343 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.25 ms. Allocated memory is still 147.3 MB. Free memory was 103.4 MB in the beginning and 94.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-10-13 23:00:18,344 INFO L168 Benchmark]: Boogie Preprocessor took 121.53 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 94.3 MB in the beginning and 183.9 MB in the end (delta: -89.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2019-10-13 23:00:18,345 INFO L168 Benchmark]: RCFGBuilder took 254.01 ms. Allocated memory is still 205.0 MB. Free memory was 183.9 MB in the beginning and 171.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2019-10-13 23:00:18,346 INFO L168 Benchmark]: TraceAbstraction took 2558.45 ms. Allocated memory was 205.0 MB in the beginning and 232.8 MB in the end (delta: 27.8 MB). Free memory was 170.7 MB in the beginning and 117.6 MB in the end (delta: 53.1 MB). Peak memory consumption was 80.9 MB. Max. memory is 7.1 GB. [2019-10-13 23:00:18,350 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 147.3 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 301.25 ms. Allocated memory is still 147.3 MB. Free memory was 103.4 MB in the beginning and 94.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.53 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 94.3 MB in the beginning and 183.9 MB in the end (delta: -89.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 254.01 ms. Allocated memory is still 205.0 MB. Free memory was 183.9 MB in the beginning and 171.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2558.45 ms. Allocated memory was 205.0 MB in the beginning and 232.8 MB in the end (delta: 27.8 MB). Free memory was 170.7 MB in the beginning and 117.6 MB in the end (delta: 53.1 MB). Peak memory consumption was 80.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 VAL [i=1, sn=0] [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ VAL [i=2, sn=2] [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ VAL [i=3, sn=4] [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ VAL [i=4, sn=6] [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ VAL [i=5, sn=6] [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ VAL [i=6, sn=6] [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ VAL [i=7, sn=6] [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ VAL [i=8, sn=6] [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ VAL [i=9, sn=6] [L13] COND FALSE !(i<=8) VAL [i=9, sn=6] [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Result: UNSAFE, OverallTime: 2.5s, OverallIterations: 4, TraceHistogramMax: 8, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 12 SDslu, 64 SDs, 0 SdLazy, 54 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=3, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 1416 SizeOfPredicates, 2 NumberOfNonLiveVariables, 68 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 586, ICFG_INTERPRETER_ENTERED_PROCEDURES: 8, DAG_INTERPRETER_EARLY_EXIT_QUERIES: 42, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 20, TOOLS_POST_TIME[ms]: 41, TOOLS_POST_CALL_APPLICATIONS: 10, TOOLS_POST_CALL_TIME[ms]: 23, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 34, TOOLS_QUANTIFIERELIM_TIME[ms]: 55, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 17, FLUID_QUERY_TIME[ms]: 4, FLUID_QUERIES: 48, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 36, DOMAIN_JOIN_TIME[ms]: 328, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 4, DOMAIN_WIDEN_TIME[ms]: 77, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME[ms]: 20, DOMAIN_ISBOTTOM_APPLICATIONS: 2, DOMAIN_ISBOTTOM_TIME[ms]: 4, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 279, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 279, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 4, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME[ms]: 10, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 10, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 5, PATH_EXPR_TIME[ms]: 4, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 18, DAG_COMPRESSION_PROCESSED_NODES: 114, DAG_COMPRESSION_RETAINED_NODES: 82, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...