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/loop-acceleration/nested_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:04:31,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:04:31,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:04:31,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:04:31,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:04:31,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:04:31,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:04:31,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:04:31,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:04:31,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:04:31,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:04:31,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:04:31,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:04:31,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:04:31,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:04:31,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:04:31,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:04:31,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:04:31,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:04:31,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:04:31,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:04:31,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:04:31,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:04:31,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:04:31,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:04:31,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:04:31,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:04:31,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:04:31,880 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:04:31,902 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:04:31,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:04:31,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:04:31,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:04:31,904 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:04:31,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:04:31,905 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:04:31,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:04:31,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:04:31,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:04:31,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:04:31,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:04:31,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:04:31,906 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:04:31,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:04:31,906 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:04:31,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:04:31,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:04:31,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:04:31,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:04:31,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:04:31,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:04:31,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:04:31,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:04:31,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:04:31,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:04:31,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:04:31,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:04:31,909 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:04:32,195 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:04:32,210 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:04:32,214 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:04:32,215 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:04:32,216 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:04:32,217 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2019-10-15 01:04:32,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e07d3017/366a71afb3d2407daf8eb18ec3b10cd3/FLAG1596928f0 [2019-10-15 01:04:32,795 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:04:32,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2019-10-15 01:04:32,804 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e07d3017/366a71afb3d2407daf8eb18ec3b10cd3/FLAG1596928f0 [2019-10-15 01:04:33,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e07d3017/366a71afb3d2407daf8eb18ec3b10cd3 [2019-10-15 01:04:33,173 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:04:33,175 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:04:33,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:04:33,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:04:33,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:04:33,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:04:33" (1/1) ... [2019-10-15 01:04:33,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4509f92e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:33, skipping insertion in model container [2019-10-15 01:04:33,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:04:33" (1/1) ... [2019-10-15 01:04:33,191 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:04:33,210 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:04:33,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:04:33,417 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:04:33,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:04:33,447 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:04:33,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:33 WrapperNode [2019-10-15 01:04:33,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:04:33,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:04:33,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:04:33,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:04:33,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:33" (1/1) ... [2019-10-15 01:04:33,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:33" (1/1) ... [2019-10-15 01:04:33,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:33" (1/1) ... [2019-10-15 01:04:33,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:33" (1/1) ... [2019-10-15 01:04:33,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:33" (1/1) ... [2019-10-15 01:04:33,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:33" (1/1) ... [2019-10-15 01:04:33,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:33" (1/1) ... [2019-10-15 01:04:33,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:04:33,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:04:33,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:04:33,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:04:33,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:04:33,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:04:33,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:04:33,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:04:33,633 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:04:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:04:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:04:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:04:33,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:04:33,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:04:33,819 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:04:33,820 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 01:04:33,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:04:33 BoogieIcfgContainer [2019-10-15 01:04:33,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:04:33,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:04:33,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:04:33,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:04:33,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:04:33" (1/3) ... [2019-10-15 01:04:33,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b9820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:04:33, skipping insertion in model container [2019-10-15 01:04:33,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:33" (2/3) ... [2019-10-15 01:04:33,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b9820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:04:33, skipping insertion in model container [2019-10-15 01:04:33,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:04:33" (3/3) ... [2019-10-15 01:04:33,830 INFO L109 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2019-10-15 01:04:33,839 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:04:33,849 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:04:33,859 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:04:33,885 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:04:33,885 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:04:33,885 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:04:33,885 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:04:33,886 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:04:33,886 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:04:33,886 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:04:33,886 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:04:33,903 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:04:33,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:04:33,907 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:33,908 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:33,910 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:33,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:33,915 INFO L82 PathProgramCache]: Analyzing trace with hash -873786703, now seen corresponding path program 1 times [2019-10-15 01:04:33,922 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:33,922 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941641711] [2019-10-15 01:04:33,922 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:33,923 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:33,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:34,172 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941641711] [2019-10-15 01:04:34,173 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:04:34,173 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:04:34,173 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778826276] [2019-10-15 01:04:34,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:04:34,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:04:34,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:04:34,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:04:34,200 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-15 01:04:34,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:04:34,242 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2019-10-15 01:04:34,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:04:34,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-15 01:04:34,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:04:34,253 INFO L225 Difference]: With dead ends: 36 [2019-10-15 01:04:34,253 INFO L226 Difference]: Without dead ends: 16 [2019-10-15 01:04:34,257 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:04:34,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-15 01:04:34,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2019-10-15 01:04:34,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-15 01:04:34,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-15 01:04:34,294 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-10-15 01:04:34,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:04:34,295 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-15 01:04:34,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:04:34,295 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-15 01:04:34,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:04:34,296 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:34,296 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:34,297 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:34,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:34,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1621360120, now seen corresponding path program 1 times [2019-10-15 01:04:34,298 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:34,298 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867455712] [2019-10-15 01:04:34,298 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:34,298 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:34,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:34,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867455712] [2019-10-15 01:04:34,373 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:04:34,373 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:04:34,374 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99695513] [2019-10-15 01:04:34,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:04:34,376 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:04:34,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:04:34,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:04:34,377 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2019-10-15 01:04:34,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:04:34,405 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2019-10-15 01:04:34,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:04:34,406 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:04:34,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:04:34,407 INFO L225 Difference]: With dead ends: 23 [2019-10-15 01:04:34,407 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 01:04:34,408 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 [2019-10-15 01:04:34,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 01:04:34,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-15 01:04:34,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 01:04:34,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-10-15 01:04:34,414 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2019-10-15 01:04:34,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:04:34,414 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-10-15 01:04:34,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:04:34,415 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-10-15 01:04:34,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:04:34,415 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:34,415 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:34,416 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:34,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1574756514, now seen corresponding path program 1 times [2019-10-15 01:04:34,417 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:34,417 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088189171] [2019-10-15 01:04:34,417 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:34,417 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:34,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:34,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088189171] [2019-10-15 01:04:34,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203116643] [2019-10-15 01:04:34,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:04:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:34,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:04:34,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:04:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:34,613 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:04:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:04:34,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2082585621] [2019-10-15 01:04:34,661 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 15 [2019-10-15 01:04:34,702 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:04:34,702 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:04:34,772 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-15 01:04:35,140 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:04:35,144 INFO L272 AbstractInterpreter]: Visited 14 different actions 110 times. Merged at 5 different actions 44 times. Widened at 3 different actions 17 times. Performed 231 root evaluator evaluations with a maximum evaluation depth of 12. Performed 231 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Found 14 fixpoints after 3 different actions. Largest state had 4 variables. [2019-10-15 01:04:35,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:35,152 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:04:35,153 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:04:35,161 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2019-10-15 01:04:35,162 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763187032] [2019-10-15 01:04:35,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:04:35,165 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:04:35,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:04:35,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:04:35,167 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 9 states. [2019-10-15 01:04:35,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:04:35,426 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2019-10-15 01:04:35,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-15 01:04:35,427 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-10-15 01:04:35,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:04:35,428 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:04:35,428 INFO L226 Difference]: Without dead ends: 31 [2019-10-15 01:04:35,430 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:04:35,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-15 01:04:35,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-15 01:04:35,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-15 01:04:35,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-15 01:04:35,438 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 14 [2019-10-15 01:04:35,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:04:35,439 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-15 01:04:35,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:04:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-15 01:04:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-15 01:04:35,444 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:35,444 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:35,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:04:35,650 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:35,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:35,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1465881457, now seen corresponding path program 2 times [2019-10-15 01:04:35,651 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:35,651 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742430328] [2019-10-15 01:04:35,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:35,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:35,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-15 01:04:35,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742430328] [2019-10-15 01:04:35,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575469245] [2019-10-15 01:04:35,823 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 [2019-10-15 01:04:35,874 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-15 01:04:35,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:04:35,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:04:35,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:04:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:04:35,918 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:04:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 01:04:35,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1703537687] [2019-10-15 01:04:35,973 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-15 01:04:35,973 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-15 01:04:35,973 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:04:35,974 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2019-10-15 01:04:35,974 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835267346] [2019-10-15 01:04:35,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-15 01:04:35,975 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:04:35,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-15 01:04:35,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:04:35,976 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2019-10-15 01:04:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:04:36,105 INFO L93 Difference]: Finished difference Result 69 states and 92 transitions. [2019-10-15 01:04:36,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:04:36,106 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2019-10-15 01:04:36,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:04:36,107 INFO L225 Difference]: With dead ends: 69 [2019-10-15 01:04:36,107 INFO L226 Difference]: Without dead ends: 47 [2019-10-15 01:04:36,108 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:04:36,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-15 01:04:36,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-15 01:04:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-15 01:04:36,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-10-15 01:04:36,126 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 30 [2019-10-15 01:04:36,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:04:36,126 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-10-15 01:04:36,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-15 01:04:36,126 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-10-15 01:04:36,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-15 01:04:36,132 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:36,133 INFO L380 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:36,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:04:36,337 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:36,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:36,338 INFO L82 PathProgramCache]: Analyzing trace with hash -649475471, now seen corresponding path program 3 times [2019-10-15 01:04:36,338 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:36,339 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815530760] [2019-10-15 01:04:36,339 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:36,339 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:36,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-15 01:04:36,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815530760] [2019-10-15 01:04:36,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986765895] [2019-10-15 01:04:36,516 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-10-15 01:04:36,573 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:04:36,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:04:36,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-15 01:04:36,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:04:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-15 01:04:36,804 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:04:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 10 proven. 320 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-15 01:04:37,220 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [989296078] [2019-10-15 01:04:37,221 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-15 01:04:37,221 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-15 01:04:37,221 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:04:37,221 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 29 [2019-10-15 01:04:37,221 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894939702] [2019-10-15 01:04:37,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-15 01:04:37,224 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:04:37,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-15 01:04:37,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2019-10-15 01:04:37,226 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 29 states. [2019-10-15 01:04:38,687 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2019-10-15 01:04:39,586 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2019-10-15 01:04:39,818 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2019-10-15 01:04:40,631 WARN L191 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2019-10-15 01:04:45,119 WARN L191 SmtUtils]: Spent 4.43 s on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2019-10-15 01:04:45,635 WARN L191 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2019-10-15 01:04:50,293 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 18 [2019-10-15 01:05:06,967 WARN L191 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2019-10-15 01:05:14,632 WARN L191 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 14 [2019-10-15 01:05:22,191 WARN L191 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 22 DAG size of output: 14