java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_05.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:35:39,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:35:39,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:35:39,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:35:39,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:35:39,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:35:39,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:35:39,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:35:39,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:35:39,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:35:39,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:35:39,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:35:39,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:35:39,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:35:39,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:35:39,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:35:39,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:35:39,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:35:39,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:35:39,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:35:39,807 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 01:35:39,827 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:35:39,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:35:39,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:35:39,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:35:39,830 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:35:39,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:35:39,831 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:35:39,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:35:39,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:35:39,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:35:39,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:35:39,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:35:39,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:35:39,833 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:35:39,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:35:39,834 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:35:39,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:35:39,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:35:39,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:35:39,834 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:35:39,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:35:39,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:35:39,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:35:39,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:35:39,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:35:39,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:35:39,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:35:39,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:35:39,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:35:40,141 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:35:40,154 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:35:40,158 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:35:40,160 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:35:40,160 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:35:40,161 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_05.i [2019-10-15 01:35:40,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8d2bbb05/b9251993b1fe4ba2af952fe433c754c4/FLAGd5418be0c [2019-10-15 01:35:40,674 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:35:40,675 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_05.i [2019-10-15 01:35:40,681 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8d2bbb05/b9251993b1fe4ba2af952fe433c754c4/FLAGd5418be0c [2019-10-15 01:35:41,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8d2bbb05/b9251993b1fe4ba2af952fe433c754c4 [2019-10-15 01:35:41,097 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:35:41,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:35:41,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:41,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:35:41,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:35:41,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:41" (1/1) ... [2019-10-15 01:35:41,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5efb01e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:41, skipping insertion in model container [2019-10-15 01:35:41,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:41" (1/1) ... [2019-10-15 01:35:41,127 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:35:41,146 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:35:41,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:41,377 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:35:41,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:41,415 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:35:41,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:41 WrapperNode [2019-10-15 01:35:41,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:41,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:35:41,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:35:41,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:35:41,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:41" (1/1) ... [2019-10-15 01:35:41,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:41" (1/1) ... [2019-10-15 01:35:41,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:41" (1/1) ... [2019-10-15 01:35:41,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:41" (1/1) ... [2019-10-15 01:35:41,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:41" (1/1) ... [2019-10-15 01:35:41,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:41" (1/1) ... [2019-10-15 01:35:41,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:41" (1/1) ... [2019-10-15 01:35:41,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:35:41,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:35:41,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:35:41,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:35:41,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:41" (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 01:35:41,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:35:41,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:35:41,611 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:35:41,611 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:35:41,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:35:41,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:35:41,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:35:41,612 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:35:41,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:35:41,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:35:41,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:35:41,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:35:41,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:35:41,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:35:41,881 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:35:41,881 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:35:41,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:41 BoogieIcfgContainer [2019-10-15 01:35:41,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:35:41,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:35:41,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:35:41,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:35:41,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:35:41" (1/3) ... [2019-10-15 01:35:41,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed5d19f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:41, skipping insertion in model container [2019-10-15 01:35:41,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:41" (2/3) ... [2019-10-15 01:35:41,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed5d19f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:41, skipping insertion in model container [2019-10-15 01:35:41,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:41" (3/3) ... [2019-10-15 01:35:41,891 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_05.i [2019-10-15 01:35:41,902 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:35:41,912 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:35:41,929 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:35:41,985 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:35:41,985 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:35:41,985 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:35:41,985 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:35:41,986 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:35:41,986 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:35:41,986 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:35:41,986 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:35:42,006 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:35:42,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:35:42,012 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:42,013 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:42,015 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:42,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:42,021 INFO L82 PathProgramCache]: Analyzing trace with hash 328370140, now seen corresponding path program 1 times [2019-10-15 01:35:42,032 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:42,032 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804197028] [2019-10-15 01:35:42,033 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:42,033 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:42,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:42,277 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 01:35:42,278 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804197028] [2019-10-15 01:35:42,279 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:42,279 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:42,280 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231802222] [2019-10-15 01:35:42,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:42,287 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:42,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:42,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:42,310 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-15 01:35:42,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:42,383 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-10-15 01:35:42,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:42,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:35:42,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:42,397 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:35:42,398 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 01:35:42,403 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 01:35:42,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 01:35:42,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 01:35:42,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 01:35:42,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-15 01:35:42,458 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2019-10-15 01:35:42,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:42,459 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-15 01:35:42,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:42,460 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-15 01:35:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:35:42,462 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:42,463 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:42,463 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:42,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:42,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1896737256, now seen corresponding path program 1 times [2019-10-15 01:35:42,465 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:42,466 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911269510] [2019-10-15 01:35:42,466 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:42,467 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:42,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:35:42,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911269510] [2019-10-15 01:35:42,569 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:42,569 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:42,570 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749942600] [2019-10-15 01:35:42,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:42,572 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:42,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:42,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:42,572 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2019-10-15 01:35:42,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:42,612 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-15 01:35:42,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:42,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:35:42,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:42,616 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:35:42,616 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:35:42,617 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 01:35:42,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:35:42,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-10-15 01:35:42,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:35:42,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-15 01:35:42,627 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-10-15 01:35:42,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:42,627 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-15 01:35:42,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:42,628 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-15 01:35:42,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:35:42,629 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:42,629 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:42,629 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:42,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:42,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1718311367, now seen corresponding path program 1 times [2019-10-15 01:35:42,630 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:42,630 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719117320] [2019-10-15 01:35:42,631 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:42,631 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:42,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:42,723 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 01:35:42,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719117320] [2019-10-15 01:35:42,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13808290] [2019-10-15 01:35:42,724 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 01:35:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:42,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:35:42,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:42,828 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 01:35:42,829 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:42,861 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 01:35:42,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [686702319] [2019-10-15 01:35:42,887 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:42,888 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:42,894 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:42,902 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:42,902 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:43,055 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:43,509 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2019-10-15 01:35:43,655 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:43,673 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:43,684 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:44,032 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:44,032 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:35:44,032 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488883693] [2019-10-15 01:35:44,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:35:44,034 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:44,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:35:44,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:35:44,035 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 18 states. [2019-10-15 01:35:44,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:44,751 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2019-10-15 01:35:44,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:35:44,753 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-10-15 01:35:44,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:44,754 INFO L225 Difference]: With dead ends: 50 [2019-10-15 01:35:44,755 INFO L226 Difference]: Without dead ends: 39 [2019-10-15 01:35:44,756 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 01:35:44,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-15 01:35:44,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2019-10-15 01:35:44,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:35:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-15 01:35:44,771 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-10-15 01:35:44,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:44,772 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-15 01:35:44,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:35:44,772 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-15 01:35:44,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:35:44,773 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:44,773 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:44,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:44,979 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:44,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:44,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1363999975, now seen corresponding path program 2 times [2019-10-15 01:35:44,980 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:44,980 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882576650] [2019-10-15 01:35:44,981 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:44,981 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:44,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:45,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882576650] [2019-10-15 01:35:45,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357864120] [2019-10-15 01:35:45,064 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 01:35:45,116 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:35:45,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:45,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:35:45,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:45,132 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:35:45,177 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [374322067] [2019-10-15 01:35:45,179 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:45,179 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:45,180 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:45,180 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:45,180 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:45,224 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:45,543 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:45,561 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:45,568 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:45,843 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:45,843 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 11] total 21 [2019-10-15 01:35:45,843 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071340685] [2019-10-15 01:35:45,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-15 01:35:45,845 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:45,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-15 01:35:45,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:35:45,847 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 21 states. [2019-10-15 01:35:46,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:46,798 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2019-10-15 01:35:46,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-15 01:35:46,799 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2019-10-15 01:35:46,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:46,801 INFO L225 Difference]: With dead ends: 73 [2019-10-15 01:35:46,801 INFO L226 Difference]: Without dead ends: 60 [2019-10-15 01:35:46,802 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=436, Invalid=1456, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:35:46,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-15 01:35:46,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 32. [2019-10-15 01:35:46,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:35:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-15 01:35:46,812 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2019-10-15 01:35:46,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:46,812 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-15 01:35:46,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-15 01:35:46,812 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-15 01:35:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:35:46,813 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:46,813 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:47,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:47,026 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:47,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:47,027 INFO L82 PathProgramCache]: Analyzing trace with hash 311824988, now seen corresponding path program 3 times [2019-10-15 01:35:47,028 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:47,028 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878781988] [2019-10-15 01:35:47,028 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:47,029 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:47,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:35:47,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878781988] [2019-10-15 01:35:47,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178402964] [2019-10-15 01:35:47,186 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 01:35:47,276 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:47,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:47,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-15 01:35:47,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:35:47,352 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:35:47,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [370647435] [2019-10-15 01:35:47,489 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:47,489 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:47,490 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:47,490 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:47,490 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:47,525 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:47,851 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:47,873 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:47,879 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:48,214 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:48,215 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 38 [2019-10-15 01:35:48,215 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817200206] [2019-10-15 01:35:48,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-15 01:35:48,216 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:48,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-15 01:35:48,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=949, Unknown=0, NotChecked=0, Total=1406 [2019-10-15 01:35:48,217 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 38 states. [2019-10-15 01:35:50,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:50,106 INFO L93 Difference]: Finished difference Result 109 states and 142 transitions. [2019-10-15 01:35:50,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-10-15 01:35:50,107 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 28 [2019-10-15 01:35:50,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:50,109 INFO L225 Difference]: With dead ends: 109 [2019-10-15 01:35:50,110 INFO L226 Difference]: Without dead ends: 91 [2019-10-15 01:35:50,115 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1756, Invalid=4886, Unknown=0, NotChecked=0, Total=6642 [2019-10-15 01:35:50,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-15 01:35:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 52. [2019-10-15 01:35:50,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-15 01:35:50,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2019-10-15 01:35:50,130 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 28 [2019-10-15 01:35:50,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:50,131 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2019-10-15 01:35:50,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-15 01:35:50,131 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2019-10-15 01:35:50,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-15 01:35:50,132 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:50,133 INFO L380 BasicCegarLoop]: trace histogram [25, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:50,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:50,336 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:50,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:50,337 INFO L82 PathProgramCache]: Analyzing trace with hash 102164889, now seen corresponding path program 4 times [2019-10-15 01:35:50,337 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:50,338 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816585172] [2019-10-15 01:35:50,338 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:50,338 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:50,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-10-15 01:35:50,562 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816585172] [2019-10-15 01:35:50,562 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186158681] [2019-10-15 01:35:50,562 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:50,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-15 01:35:50,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:50,847 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 01:35:50,847 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 01:35:51,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1138220215] [2019-10-15 01:35:51,469 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:51,470 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:51,470 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:51,470 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:51,471 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:51,494 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:51,730 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2019-10-15 01:35:51,823 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:51,836 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:51,841 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:52,155 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:52,155 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 28, 28, 11] total 72 [2019-10-15 01:35:52,155 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40708837] [2019-10-15 01:35:52,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-10-15 01:35:52,157 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:52,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-10-15 01:35:52,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2038, Invalid=3074, Unknown=0, NotChecked=0, Total=5112 [2019-10-15 01:35:52,160 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 72 states. [2019-10-15 01:35:56,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:56,695 INFO L93 Difference]: Finished difference Result 172 states and 232 transitions. [2019-10-15 01:35:56,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-10-15 01:35:56,696 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 48 [2019-10-15 01:35:56,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:56,699 INFO L225 Difference]: With dead ends: 172 [2019-10-15 01:35:56,699 INFO L226 Difference]: Without dead ends: 151 [2019-10-15 01:35:56,705 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8624 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7326, Invalid=16854, Unknown=0, NotChecked=0, Total=24180 [2019-10-15 01:35:56,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-10-15 01:35:56,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 93. [2019-10-15 01:35:56,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-15 01:35:56,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2019-10-15 01:35:56,724 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 48 [2019-10-15 01:35:56,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:56,725 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2019-10-15 01:35:56,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-10-15 01:35:56,725 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2019-10-15 01:35:56,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-15 01:35:56,728 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:56,728 INFO L380 BasicCegarLoop]: trace histogram [59, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:56,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:56,933 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:56,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:56,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1137625480, now seen corresponding path program 5 times [2019-10-15 01:35:56,934 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:56,934 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55982976] [2019-10-15 01:35:56,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:56,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:56,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1941 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2019-10-15 01:35:57,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55982976] [2019-10-15 01:35:57,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933336799] [2019-10-15 01:35:57,299 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:05,734 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-15 01:36:05,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:05,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-15 01:36:05,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1941 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2019-10-15 01:36:05,763 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1941 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2019-10-15 01:36:06,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [755966930] [2019-10-15 01:36:06,230 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:36:06,230 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:06,230 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:06,231 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:06,231 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:06,262 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:06,500 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:36:06,505 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:06,508 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:06,871 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:06,871 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21, 11] total 51 [2019-10-15 01:36:06,872 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339280963] [2019-10-15 01:36:06,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-10-15 01:36:06,873 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:06,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-10-15 01:36:06,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=928, Invalid=1622, Unknown=0, NotChecked=0, Total=2550 [2019-10-15 01:36:06,874 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 51 states. [2019-10-15 01:36:11,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:11,811 INFO L93 Difference]: Finished difference Result 240 states and 298 transitions. [2019-10-15 01:36:11,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-10-15 01:36:11,811 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 89 [2019-10-15 01:36:11,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:11,814 INFO L225 Difference]: With dead ends: 240 [2019-10-15 01:36:11,815 INFO L226 Difference]: Without dead ends: 231 [2019-10-15 01:36:11,820 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4847 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5146, Invalid=12676, Unknown=0, NotChecked=0, Total=17822 [2019-10-15 01:36:11,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-10-15 01:36:11,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 113. [2019-10-15 01:36:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-15 01:36:11,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2019-10-15 01:36:11,850 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 89 [2019-10-15 01:36:11,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:11,851 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2019-10-15 01:36:11,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-10-15 01:36:11,851 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2019-10-15 01:36:11,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-15 01:36:11,853 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:11,853 INFO L380 BasicCegarLoop]: trace histogram [59, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:12,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:12,054 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:12,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:12,055 INFO L82 PathProgramCache]: Analyzing trace with hash 854243016, now seen corresponding path program 6 times [2019-10-15 01:36:12,055 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:12,056 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291574159] [2019-10-15 01:36:12,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:12,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:12,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2019-10-15 01:36:12,842 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291574159] [2019-10-15 01:36:12,842 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093434262] [2019-10-15 01:36:12,842 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:13,008 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:36:13,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:13,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 61 conjunts are in the unsatisfiable core [2019-10-15 01:36:13,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2019-10-15 01:36:13,506 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2019-10-15 01:36:16,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [393891142] [2019-10-15 01:36:16,519 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:36:16,519 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:16,520 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:16,520 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:16,520 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:16,549 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:16,777 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:36:16,784 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:16,786 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:17,181 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:17,181 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 62, 62, 11] total 160 [2019-10-15 01:36:17,181 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765599024] [2019-10-15 01:36:17,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 160 states [2019-10-15 01:36:17,183 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:17,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2019-10-15 01:36:17,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11498, Invalid=13942, Unknown=0, NotChecked=0, Total=25440 [2019-10-15 01:36:17,188 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 160 states.