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_04.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:35:39,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:35:39,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:35:39,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:35:39,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:35:39,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:35:39,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:35:39,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:35:39,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:35:39,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:35:39,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:35:39,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:35:39,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:35:39,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:35:39,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:35:39,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:35:39,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:35:39,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:35:39,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:35:39,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:35:39,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:35:39,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:35:39,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:35:39,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:35:39,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:35:39,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:35:39,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:35:39,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:35:39,140 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 01:35:39,159 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:35:39,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:35:39,162 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:35:39,162 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:35:39,162 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:35:39,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:35:39,163 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:35:39,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:35:39,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:35:39,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:35:39,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:35:39,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:35:39,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:35:39,165 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:35:39,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:35:39,166 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:35:39,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:35:39,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:35:39,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:35:39,166 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:35:39,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:35:39,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:35:39,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:35:39,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:35:39,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:35:39,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:35:39,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:35:39,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:35:39,168 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 01:35:39,451 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:35:39,464 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:35:39,468 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:35:39,469 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:35:39,470 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:35:39,471 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_04.i [2019-10-15 01:35:39,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a2cde9a6/4430b8f3543144919ed5506543d8bdef/FLAGa2e0c7720 [2019-10-15 01:35:39,978 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:35:39,979 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_04.i [2019-10-15 01:35:39,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a2cde9a6/4430b8f3543144919ed5506543d8bdef/FLAGa2e0c7720 [2019-10-15 01:35:40,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a2cde9a6/4430b8f3543144919ed5506543d8bdef [2019-10-15 01:35:40,395 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:35:40,396 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:35:40,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:40,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:35:40,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:35:40,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:40" (1/1) ... [2019-10-15 01:35:40,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f650260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40, skipping insertion in model container [2019-10-15 01:35:40,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:40" (1/1) ... [2019-10-15 01:35:40,412 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:35:40,431 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:35:40,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:40,634 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:35:40,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:40,670 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:35:40,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40 WrapperNode [2019-10-15 01:35:40,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:40,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:35:40,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:35:40,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:35:40,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40" (1/1) ... [2019-10-15 01:35:40,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40" (1/1) ... [2019-10-15 01:35:40,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40" (1/1) ... [2019-10-15 01:35:40,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40" (1/1) ... [2019-10-15 01:35:40,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40" (1/1) ... [2019-10-15 01:35:40,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40" (1/1) ... [2019-10-15 01:35:40,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40" (1/1) ... [2019-10-15 01:35:40,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:35:40,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:35:40,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:35:40,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:35:40,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40" (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 01:35:40,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:35:40,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:35:40,850 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:35:40,850 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:35:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:35:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:35:40,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:35:40,851 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:35:40,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:35:40,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:35:40,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:35:40,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:35:40,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:35:40,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:35:41,181 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:35:41,182 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:35:41,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:41 BoogieIcfgContainer [2019-10-15 01:35:41,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:35:41,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:35:41,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:35:41,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:35:41,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:35:40" (1/3) ... [2019-10-15 01:35:41,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514bbfc5 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 01:35:41,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:40" (2/3) ... [2019-10-15 01:35:41,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514bbfc5 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 01:35:41,197 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 01:35:41,201 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_04.i [2019-10-15 01:35:41,217 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:35:41,224 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:35:41,235 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:35:41,263 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:35:41,263 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:35:41,263 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:35:41,263 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:35:41,264 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:35:41,264 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:35:41,264 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:35:41,264 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:35:41,280 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:35:41,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:35:41,285 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:41,286 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:41,289 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:41,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:41,294 INFO L82 PathProgramCache]: Analyzing trace with hash 328370140, now seen corresponding path program 1 times [2019-10-15 01:35:41,301 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:41,302 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805854612] [2019-10-15 01:35:41,302 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:41,302 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:41,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:41,496 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 01:35:41,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805854612] [2019-10-15 01:35:41,498 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:41,499 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:41,499 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085593921] [2019-10-15 01:35:41,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:41,509 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:41,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:41,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:41,538 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-15 01:35:41,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:41,617 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-10-15 01:35:41,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:41,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:35:41,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:41,631 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:35:41,631 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 01:35:41,637 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 01:35:41,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 01:35:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 01:35:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 01:35:41,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-15 01:35:41,683 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2019-10-15 01:35:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:41,684 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-15 01:35:41,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-15 01:35:41,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:35:41,686 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:41,687 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:41,688 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:41,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:41,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1896737256, now seen corresponding path program 1 times [2019-10-15 01:35:41,690 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:41,690 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912654062] [2019-10-15 01:35:41,690 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:41,691 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:41,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:41,791 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 01:35:41,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912654062] [2019-10-15 01:35:41,794 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:41,795 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:41,795 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615164680] [2019-10-15 01:35:41,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:41,797 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:41,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:41,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:41,797 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2019-10-15 01:35:41,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:41,829 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-15 01:35:41,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:41,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:35:41,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:41,833 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:35:41,834 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:35:41,835 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 01:35:41,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:35:41,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2019-10-15 01:35:41,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:35:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-15 01:35:41,845 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-10-15 01:35:41,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:41,846 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-15 01:35:41,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-15 01:35:41,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:35:41,847 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:41,847 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:41,848 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:41,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:41,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1718311367, now seen corresponding path program 1 times [2019-10-15 01:35:41,849 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:41,849 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430959908] [2019-10-15 01:35:41,849 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:41,849 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:41,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:41,923 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 01:35:41,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430959908] [2019-10-15 01:35:41,924 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429599299] [2019-10-15 01:35:41,924 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 01:35:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:41,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:35:41,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:42,032 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 01:35:42,033 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:42,067 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 01:35:42,067 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1392185887] [2019-10-15 01:35:42,094 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:42,094 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:42,102 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:42,110 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:42,111 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:42,287 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:42,703 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2019-10-15 01:35:42,846 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:42,870 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:42,882 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:43,263 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:43,263 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:35:43,264 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359053579] [2019-10-15 01:35:43,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:35:43,266 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:43,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:35:43,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:35:43,269 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 18 states. [2019-10-15 01:35:44,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:44,035 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2019-10-15 01:35:44,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:35:44,035 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-10-15 01:35:44,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:44,037 INFO L225 Difference]: With dead ends: 50 [2019-10-15 01:35:44,037 INFO L226 Difference]: Without dead ends: 39 [2019-10-15 01:35:44,038 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 01:35:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-15 01:35:44,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2019-10-15 01:35:44,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:35:44,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-15 01:35:44,054 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-10-15 01:35:44,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:44,055 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-15 01:35:44,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:35:44,055 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-15 01:35:44,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:35:44,056 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:44,057 INFO L380 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:44,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:44,258 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:44,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:44,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1363999975, now seen corresponding path program 2 times [2019-10-15 01:35:44,259 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:44,260 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842668258] [2019-10-15 01:35:44,260 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:44,260 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:44,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:44,330 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 01:35:44,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842668258] [2019-10-15 01:35:44,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912341277] [2019-10-15 01:35:44,331 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 01:35:44,404 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:35:44,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:44,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:35:44,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:44,421 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 01:35:44,422 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:44,462 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 01:35:44,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2046347894] [2019-10-15 01:35:44,464 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:44,464 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:44,465 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:44,465 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:44,465 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:44,516 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:44,834 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:44,853 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:44,861 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:45,183 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:45,184 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 11] total 21 [2019-10-15 01:35:45,184 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142289826] [2019-10-15 01:35:45,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-15 01:35:45,187 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:45,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-15 01:35:45,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:35:45,188 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 21 states. [2019-10-15 01:35:46,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:46,134 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2019-10-15 01:35:46,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-15 01:35:46,135 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2019-10-15 01:35:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:46,136 INFO L225 Difference]: With dead ends: 73 [2019-10-15 01:35:46,136 INFO L226 Difference]: Without dead ends: 60 [2019-10-15 01:35:46,138 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 01:35:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-15 01:35:46,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 32. [2019-10-15 01:35:46,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:35:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-15 01:35:46,148 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2019-10-15 01:35:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:46,148 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-15 01:35:46,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-15 01:35:46,148 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-15 01:35:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:35:46,149 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:46,149 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:46,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:46,354 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:46,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:46,355 INFO L82 PathProgramCache]: Analyzing trace with hash 311824988, now seen corresponding path program 3 times [2019-10-15 01:35:46,356 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:46,356 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326510161] [2019-10-15 01:35:46,356 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,357 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:46,549 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 01:35:46,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326510161] [2019-10-15 01:35:46,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292574339] [2019-10-15 01:35:46,549 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 01:35:46,627 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:46,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:46,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-15 01:35:46,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:46,703 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 01:35:46,704 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:46,854 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 01:35:46,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [620636248] [2019-10-15 01:35:46,856 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:46,857 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:46,858 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:46,858 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:46,859 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:46,898 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:47,221 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:47,236 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:47,242 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:47,708 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:47,709 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 38 [2019-10-15 01:35:47,709 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879263055] [2019-10-15 01:35:47,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-15 01:35:47,710 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:47,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-15 01:35:47,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=949, Unknown=0, NotChecked=0, Total=1406 [2019-10-15 01:35:47,712 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 38 states. [2019-10-15 01:35:49,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:49,603 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2019-10-15 01:35:49,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-10-15 01:35:49,604 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 28 [2019-10-15 01:35:49,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:49,607 INFO L225 Difference]: With dead ends: 111 [2019-10-15 01:35:49,608 INFO L226 Difference]: Without dead ends: 93 [2019-10-15 01:35:49,611 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1760, Invalid=4882, Unknown=0, NotChecked=0, Total=6642 [2019-10-15 01:35:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-10-15 01:35:49,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2019-10-15 01:35:49,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-15 01:35:49,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2019-10-15 01:35:49,625 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 28 [2019-10-15 01:35:49,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:49,625 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2019-10-15 01:35:49,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-15 01:35:49,626 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2019-10-15 01:35:49,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 01:35:49,627 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:49,627 INFO L380 BasicCegarLoop]: trace histogram [25, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:49,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:49,831 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:49,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:49,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1515479896, now seen corresponding path program 4 times [2019-10-15 01:35:49,832 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:49,833 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665173147] [2019-10-15 01:35:49,833 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:49,833 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:49,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-10-15 01:35:50,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665173147] [2019-10-15 01:35:50,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670426630] [2019-10-15 01:35:50,045 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 01:35:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:50,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-15 01:35:50,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:35:50,278 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:35:50,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [497511265] [2019-10-15 01:35:50,998 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:50,999 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:50,999 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:50,999 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:50,999 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:51,040 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:51,356 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:35:51,367 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:51,371 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:51,730 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:51,730 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 28, 28, 11] total 71 [2019-10-15 01:35:51,730 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153874069] [2019-10-15 01:35:51,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-10-15 01:35:51,735 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:51,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-10-15 01:35:51,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1975, Invalid=2995, Unknown=0, NotChecked=0, Total=4970 [2019-10-15 01:35:51,741 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 71 states. [2019-10-15 01:35:56,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:56,501 INFO L93 Difference]: Finished difference Result 182 states and 245 transitions. [2019-10-15 01:35:56,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-10-15 01:35:56,502 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 49 [2019-10-15 01:35:56,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:56,505 INFO L225 Difference]: With dead ends: 182 [2019-10-15 01:35:56,505 INFO L226 Difference]: Without dead ends: 160 [2019-10-15 01:35:56,512 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8564 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7337, Invalid=17155, Unknown=0, NotChecked=0, Total=24492 [2019-10-15 01:35:56,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-10-15 01:35:56,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 94. [2019-10-15 01:35:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-15 01:35:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2019-10-15 01:35:56,534 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 49 [2019-10-15 01:35:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:56,534 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2019-10-15 01:35:56,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-10-15 01:35:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2019-10-15 01:35:56,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-15 01:35:56,537 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:56,538 INFO L380 BasicCegarLoop]: trace histogram [58, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:56,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:56,740 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:56,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:56,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1495953052, now seen corresponding path program 5 times [2019-10-15 01:35:56,742 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:56,742 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688219391] [2019-10-15 01:35:56,742 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:56,743 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:56,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1921 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2019-10-15 01:35:57,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688219391] [2019-10-15 01:35:57,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060110919] [2019-10-15 01:35:57,190 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