java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:07:13,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:07:13,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:07:13,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:07:13,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:07:13,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:07:13,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:07:13,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:07:13,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:07:13,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:07:13,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:07:13,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:07:13,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:07:13,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:07:13,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:07:13,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:07:13,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:07:13,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:07:13,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:07:13,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:07:13,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:07:13,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:07:13,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:07:13,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:07:13,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:07:13,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:07:13,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:07:13,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:07:13,920 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 21:07:13,940 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:07:13,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:07:13,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:07:13,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:07:13,943 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:07:13,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:07:13,943 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:07:13,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:07:13,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:07:13,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:07:13,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:07:13,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:07:13,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:07:13,946 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:07:13,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:07:13,946 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:07:13,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:07:13,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:07:13,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:07:13,947 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:07:13,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:07:13,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:07:13,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:07:13,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:07:13,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:07:13,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:07:13,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:07:13,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:07:13,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:07:14,281 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:07:14,300 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:07:14,306 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:07:14,307 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:07:14,308 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:07:14,308 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2019-10-13 21:07:14,383 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9596ad8df/0c49acfafcb2469abfb487a71264e2ed/FLAG3ab0a2713 [2019-10-13 21:07:14,865 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:07:14,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2019-10-13 21:07:14,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9596ad8df/0c49acfafcb2469abfb487a71264e2ed/FLAG3ab0a2713 [2019-10-13 21:07:15,286 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9596ad8df/0c49acfafcb2469abfb487a71264e2ed [2019-10-13 21:07:15,297 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:07:15,302 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:07:15,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:07:15,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:07:15,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:07:15,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:07:15" (1/1) ... [2019-10-13 21:07:15,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be7d9ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:15, skipping insertion in model container [2019-10-13 21:07:15,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:07:15" (1/1) ... [2019-10-13 21:07:15,321 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:07:15,339 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:07:15,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:07:15,510 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:07:15,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:07:15,538 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:07:15,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:15 WrapperNode [2019-10-13 21:07:15,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:07:15,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:07:15,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:07:15,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:07:15,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:15" (1/1) ... [2019-10-13 21:07:15,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:15" (1/1) ... [2019-10-13 21:07:15,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:15" (1/1) ... [2019-10-13 21:07:15,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:15" (1/1) ... [2019-10-13 21:07:15,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:15" (1/1) ... [2019-10-13 21:07:15,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:15" (1/1) ... [2019-10-13 21:07:15,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:15" (1/1) ... [2019-10-13 21:07:15,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:07:15,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:07:15,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:07:15,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:07:15,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:15" (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 21:07:15,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:07:15,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:07:15,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 21:07:15,718 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:07:15,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:07:15,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 21:07:15,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-13 21:07:15,719 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:07:15,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:07:15,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:07:15,888 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:07:15,888 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:07:15,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:07:15 BoogieIcfgContainer [2019-10-13 21:07:15,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:07:15,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:07:15,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:07:15,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:07:15,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:07:15" (1/3) ... [2019-10-13 21:07:15,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554ca8f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:07:15, skipping insertion in model container [2019-10-13 21:07:15,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:07:15" (2/3) ... [2019-10-13 21:07:15,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554ca8f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:07:15, skipping insertion in model container [2019-10-13 21:07:15,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:07:15" (3/3) ... [2019-10-13 21:07:15,898 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2019-10-13 21:07:15,909 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:07:15,917 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:07:15,930 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:07:15,958 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:07:15,959 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:07:15,959 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:07:15,959 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:07:15,959 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:07:15,959 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:07:15,960 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:07:15,960 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:07:15,986 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-13 21:07:16,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 21:07:16,001 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:07:16,006 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:07:16,011 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:07:16,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:07:16,019 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2019-10-13 21:07:16,032 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:07:16,033 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114056655] [2019-10-13 21:07:16,033 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:16,034 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:16,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:07:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:07:16,155 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 21:07:16,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114056655] [2019-10-13 21:07:16,157 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:07:16,157 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 21:07:16,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818223418] [2019-10-13 21:07:16,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:07:16,163 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:07:16,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:07:16,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 21:07:16,177 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-10-13 21:07:16,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:07:16,200 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-13 21:07:16,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:07:16,202 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-13 21:07:16,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:07:16,210 INFO L225 Difference]: With dead ends: 30 [2019-10-13 21:07:16,211 INFO L226 Difference]: Without dead ends: 13 [2019-10-13 21:07:16,214 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 21:07:16,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-13 21:07:16,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-13 21:07:16,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-13 21:07:16,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-10-13 21:07:16,245 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-10-13 21:07:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:07:16,246 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-10-13 21:07:16,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:07:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-10-13 21:07:16,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 21:07:16,247 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:07:16,247 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:07:16,247 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:07:16,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:07:16,248 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2019-10-13 21:07:16,248 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:07:16,249 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324764205] [2019-10-13 21:07:16,249 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:16,249 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:16,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:07:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:07:16,344 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 21:07:16,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324764205] [2019-10-13 21:07:16,345 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:07:16,345 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:07:16,345 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521873033] [2019-10-13 21:07:16,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:07:16,348 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:07:16,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:07:16,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:07:16,349 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2019-10-13 21:07:16,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:07:16,397 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-10-13 21:07:16,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:07:16,398 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-13 21:07:16,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:07:16,399 INFO L225 Difference]: With dead ends: 19 [2019-10-13 21:07:16,399 INFO L226 Difference]: Without dead ends: 14 [2019-10-13 21:07:16,400 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:07:16,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-13 21:07:16,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-13 21:07:16,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-13 21:07:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-13 21:07:16,406 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-10-13 21:07:16,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:07:16,406 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-13 21:07:16,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:07:16,406 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-13 21:07:16,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 21:07:16,407 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:07:16,407 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:07:16,408 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:07:16,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:07:16,408 INFO L82 PathProgramCache]: Analyzing trace with hash 137668885, now seen corresponding path program 1 times [2019-10-13 21:07:16,408 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:07:16,409 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361940099] [2019-10-13 21:07:16,409 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:16,409 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:16,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:07:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:07:16,630 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 21:07:16,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361940099] [2019-10-13 21:07:16,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645724587] [2019-10-13 21:07:16,631 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 21:07:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:07:16,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 21:07:16,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:07:16,787 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:07:16,834 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 21:07:16,834 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:07:16,989 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 21:07:16,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1230251294] [2019-10-13 21:07:16,997 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 14 [2019-10-13 21:07:17,033 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 21:07:17,034 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 21:07:17,098 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-13 21:07:17,235 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-13 21:07:17,240 INFO L272 AbstractInterpreter]: Visited 13 different actions 53 times. Merged at 4 different actions 20 times. Widened at 1 different actions 3 times. Performed 86 root evaluator evaluations with a maximum evaluation depth of 6. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2019-10-13 21:07:17,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:07:17,246 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:07:17,247 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 21:07:17,247 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2019-10-13 21:07:17,247 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247152294] [2019-10-13 21:07:17,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 21:07:17,248 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:07:17,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 21:07:17,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:07:17,249 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 18 states. [2019-10-13 21:07:17,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:07:17,430 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2019-10-13 21:07:17,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 21:07:17,431 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2019-10-13 21:07:17,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:07:17,432 INFO L225 Difference]: With dead ends: 33 [2019-10-13 21:07:17,432 INFO L226 Difference]: Without dead ends: 21 [2019-10-13 21:07:17,433 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2019-10-13 21:07:17,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-13 21:07:17,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-10-13 21:07:17,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 21:07:17,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-13 21:07:17,438 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2019-10-13 21:07:17,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:07:17,439 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-13 21:07:17,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 21:07:17,439 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-13 21:07:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 21:07:17,440 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:07:17,440 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:07:17,643 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:07:17,644 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:07:17,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:07:17,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2019-10-13 21:07:17,645 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:07:17,646 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859329192] [2019-10-13 21:07:17,646 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:17,646 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:17,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:07:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:07:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:07:17,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859329192] [2019-10-13 21:07:17,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841864151] [2019-10-13 21:07:17,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:07:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:07:17,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:07:17,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:07:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:07:17,757 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:07:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:07:17,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [408340861] [2019-10-13 21:07:17,811 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 17 [2019-10-13 21:07:17,812 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 21:07:17,812 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 21:07:17,814 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-13 21:07:17,870 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-13 21:07:17,870 INFO L272 AbstractInterpreter]: Visited 14 different actions 69 times. Merged at 5 different actions 25 times. Widened at 1 different actions 4 times. Performed 120 root evaluator evaluations with a maximum evaluation depth of 6. Performed 120 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 5 fixpoints after 2 different actions. Largest state had 5 variables. [2019-10-13 21:07:17,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:07:17,871 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:07:17,871 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 21:07:17,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2019-10-13 21:07:17,871 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783702571] [2019-10-13 21:07:17,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:07:17,872 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:07:17,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:07:17,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:07:17,873 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2019-10-13 21:07:17,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:07:17,904 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-13 21:07:17,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:07:17,905 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-10-13 21:07:17,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:07:17,907 INFO L225 Difference]: With dead ends: 30 [2019-10-13 21:07:17,907 INFO L226 Difference]: Without dead ends: 22 [2019-10-13 21:07:17,909 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:07:17,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-13 21:07:17,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-10-13 21:07:17,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-13 21:07:17,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-10-13 21:07:17,914 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2019-10-13 21:07:17,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:07:17,914 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-10-13 21:07:17,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:07:17,914 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-10-13 21:07:17,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 21:07:17,915 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:07:17,915 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:07:18,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:07:18,118 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:07:18,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:07:18,119 INFO L82 PathProgramCache]: Analyzing trace with hash 370288085, now seen corresponding path program 2 times [2019-10-13 21:07:18,120 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:07:18,120 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015635883] [2019-10-13 21:07:18,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:18,121 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:18,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:07:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:07:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 21:07:18,339 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015635883] [2019-10-13 21:07:18,339 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721916730] [2019-10-13 21:07:18,340 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:07:18,371 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 21:07:18,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:07:18,373 WARN L254 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 21:07:18,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:07:18,552 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:07:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:07:18,589 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:07:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:07:18,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [365443635] [2019-10-13 21:07:18,927 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-13 21:07:18,927 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-13 21:07:18,927 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 21:07:18,927 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 27 [2019-10-13 21:07:18,928 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676124009] [2019-10-13 21:07:18,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-13 21:07:18,928 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:07:18,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-13 21:07:18,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2019-10-13 21:07:18,930 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 27 states. [2019-10-13 21:07:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:07:19,442 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-10-13 21:07:19,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 21:07:19,442 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 19 [2019-10-13 21:07:19,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:07:19,443 INFO L225 Difference]: With dead ends: 33 [2019-10-13 21:07:19,443 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 21:07:19,444 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 21:07:19,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 21:07:19,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2019-10-13 21:07:19,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 21:07:19,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-13 21:07:19,449 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2019-10-13 21:07:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:07:19,450 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-13 21:07:19,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-13 21:07:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-13 21:07:19,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 21:07:19,451 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:07:19,451 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:07:19,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:07:19,662 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:07:19,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:07:19,663 INFO L82 PathProgramCache]: Analyzing trace with hash 66146485, now seen corresponding path program 2 times [2019-10-13 21:07:19,663 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:07:19,663 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185800450] [2019-10-13 21:07:19,664 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:19,664 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:07:19,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:07:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 21:07:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 21:07:19,709 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-13 21:07:19,709 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-13 21:07:19,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 09:07:19 BoogieIcfgContainer [2019-10-13 21:07:19,735 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 21:07:19,738 INFO L168 Benchmark]: Toolchain (without parser) took 4437.70 ms. Allocated memory was 143.1 MB in the beginning and 250.6 MB in the end (delta: 107.5 MB). Free memory was 101.4 MB in the beginning and 152.3 MB in the end (delta: -51.0 MB). Peak memory consumption was 56.5 MB. Max. memory is 7.1 GB. [2019-10-13 21:07:19,739 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 143.1 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-10-13 21:07:19,740 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.86 ms. Allocated memory is still 143.1 MB. Free memory was 101.2 MB in the beginning and 91.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-10-13 21:07:19,741 INFO L168 Benchmark]: Boogie Preprocessor took 108.14 ms. Allocated memory was 143.1 MB in the beginning and 199.8 MB in the end (delta: 56.6 MB). Free memory was 91.8 MB in the beginning and 177.9 MB in the end (delta: -86.1 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2019-10-13 21:07:19,742 INFO L168 Benchmark]: RCFGBuilder took 241.94 ms. Allocated memory is still 199.8 MB. Free memory was 177.9 MB in the beginning and 167.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2019-10-13 21:07:19,743 INFO L168 Benchmark]: TraceAbstraction took 3844.61 ms. Allocated memory was 199.8 MB in the beginning and 250.6 MB in the end (delta: 50.9 MB). Free memory was 166.4 MB in the beginning and 152.3 MB in the end (delta: 14.1 MB). Peak memory consumption was 65.0 MB. Max. memory is 7.1 GB. [2019-10-13 21:07:19,747 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 143.1 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 233.86 ms. Allocated memory is still 143.1 MB. Free memory was 101.2 MB in the beginning and 91.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.14 ms. Allocated memory was 143.1 MB in the beginning and 199.8 MB in the end (delta: 56.6 MB). Free memory was 91.8 MB in the beginning and 177.9 MB in the end (delta: -86.1 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 241.94 ms. Allocated memory is still 199.8 MB. Free memory was 177.9 MB in the beginning and 167.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3844.61 ms. Allocated memory was 199.8 MB in the beginning and 250.6 MB in the end (delta: 50.9 MB). Free memory was 166.4 MB in the beginning and 152.3 MB in the end (delta: 14.1 MB). Peak memory consumption was 65.0 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, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=4, n=0] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=1, n=4, n=2] [L15] COND FALSE !(i==4) VAL [i=1, n=2, n=4] [L13] i++ VAL [i=2, n=2, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=2, n=4, n=4] [L15] COND FALSE !(i==4) VAL [i=2, n=4, n=4] [L13] i++ VAL [i=3, n=4, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=3, n=6, n=4] [L15] COND FALSE !(i==4) VAL [i=3, n=6, n=4] [L13] i++ VAL [i=4, n=6, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=4, n=4, n=8] [L15] COND TRUE i==4 [L15] sn=-10 VAL [i=4, n=-10, n=4] [L13] i++ VAL [i=5, n=-10, n=4] [L13] COND FALSE !(i<=n) VAL [i=5, n=-10, n=4] [L17] CALL __VERIFIER_assert(sn==n*(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, 19 locations, 1 error locations. Result: UNSAFE, OverallTime: 3.7s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 59 SDtfs, 34 SDslu, 217 SDs, 0 SdLazy, 317 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 138 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=5, 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, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 153 ConstructedInterpolants, 0 QuantifiedInterpolants, 14031 SizeOfPredicates, 9 NumberOfNonLiveVariables, 117 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 14/54 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...