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/sanfoundry_10_ground.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:31:43,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:31:43,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:31:43,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:31:43,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:31:43,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:31:43,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:31:43,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:31:43,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:31:43,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:31:43,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:31:43,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:31:43,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:31:43,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:31:43,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:31:43,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:31:43,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:31:43,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:31:43,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:31:43,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:31:43,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:31:43,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:31:43,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:31:43,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:31:43,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:31:43,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:31:43,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:31:43,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:31:43,252 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 01:31:43,277 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:31:43,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:31:43,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:31:43,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:31:43,280 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:31:43,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:31:43,281 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:31:43,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:31:43,281 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:31:43,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:31:43,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:31:43,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:31:43,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:31:43,283 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:31:43,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:31:43,284 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:31:43,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:31:43,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:31:43,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:31:43,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:31:43,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:31:43,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:31:43,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:31:43,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:31:43,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:31:43,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:31:43,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:31:43,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:31:43,286 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 01:31:43,573 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:31:43,586 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:31:43,590 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:31:43,591 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:31:43,592 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:31:43,593 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2019-10-15 01:31:43,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a3aefa5c/5e32bdab08034889a554c0c922866f3c/FLAG18a6db3a3 [2019-10-15 01:31:44,140 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:31:44,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2019-10-15 01:31:44,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a3aefa5c/5e32bdab08034889a554c0c922866f3c/FLAG18a6db3a3 [2019-10-15 01:31:44,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a3aefa5c/5e32bdab08034889a554c0c922866f3c [2019-10-15 01:31:44,505 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:31:44,507 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:31:44,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:44,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:31:44,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:31:44,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:44" (1/1) ... [2019-10-15 01:31:44,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37f94d89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44, skipping insertion in model container [2019-10-15 01:31:44,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:44" (1/1) ... [2019-10-15 01:31:44,529 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:31:44,549 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:31:44,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:44,775 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:31:44,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:31:44,817 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:31:44,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44 WrapperNode [2019-10-15 01:31:44,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:31:44,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:31:44,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:31:44,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:31:44,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44" (1/1) ... [2019-10-15 01:31:44,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44" (1/1) ... [2019-10-15 01:31:44,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44" (1/1) ... [2019-10-15 01:31:44,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44" (1/1) ... [2019-10-15 01:31:44,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44" (1/1) ... [2019-10-15 01:31:44,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44" (1/1) ... [2019-10-15 01:31:44,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44" (1/1) ... [2019-10-15 01:31:44,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:31:44,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:31:44,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:31:44,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:31:44,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44" (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 01:31:45,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:31:45,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:31:45,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:31:45,016 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:31:45,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:31:45,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:31:45,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:31:45,016 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:31:45,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:31:45,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:31:45,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:31:45,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:31:45,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:31:45,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:31:45,426 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:31:45,426 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 01:31:45,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:45 BoogieIcfgContainer [2019-10-15 01:31:45,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:31:45,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:31:45,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:31:45,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:31:45,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:31:44" (1/3) ... [2019-10-15 01:31:45,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16aeeb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:45, skipping insertion in model container [2019-10-15 01:31:45,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:44" (2/3) ... [2019-10-15 01:31:45,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16aeeb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:45, skipping insertion in model container [2019-10-15 01:31:45,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:45" (3/3) ... [2019-10-15 01:31:45,436 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2019-10-15 01:31:45,444 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:31:45,452 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:31:45,462 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:31:45,483 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:31:45,484 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:31:45,484 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:31:45,484 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:31:45,484 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:31:45,485 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:31:45,485 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:31:45,485 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:31:45,499 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 01:31:45,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:31:45,505 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:45,506 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:45,508 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:45,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:45,514 INFO L82 PathProgramCache]: Analyzing trace with hash -461873160, now seen corresponding path program 1 times [2019-10-15 01:31:45,521 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:45,521 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178736515] [2019-10-15 01:31:45,521 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:45,522 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:45,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:45,680 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 01:31:45,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178736515] [2019-10-15 01:31:45,682 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:31:45,682 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:31:45,684 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397535948] [2019-10-15 01:31:45,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:31:45,690 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:45,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:31:45,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:31:45,705 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 01:31:45,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:45,763 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2019-10-15 01:31:45,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:31:45,764 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-15 01:31:45,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:45,771 INFO L225 Difference]: With dead ends: 43 [2019-10-15 01:31:45,772 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 01:31:45,775 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 01:31:45,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 01:31:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 01:31:45,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 01:31:45,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-10-15 01:31:45,808 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2019-10-15 01:31:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:45,809 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-10-15 01:31:45,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:31:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-10-15 01:31:45,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:31:45,810 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:45,810 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:45,811 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:45,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:45,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1309090252, now seen corresponding path program 1 times [2019-10-15 01:31:45,812 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:45,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325545805] [2019-10-15 01:31:45,812 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:45,812 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:45,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:31:45,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325545805] [2019-10-15 01:31:45,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072114456] [2019-10-15 01:31:45,954 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 01:31:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:46,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:31:46,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:46,087 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 01:31:46,087 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:46,118 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 01:31:46,119 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:31:46,119 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2019-10-15 01:31:46,120 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287900749] [2019-10-15 01:31:46,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:31:46,123 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:46,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:31:46,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:31:46,124 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2019-10-15 01:31:46,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:46,183 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2019-10-15 01:31:46,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:31:46,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-15 01:31:46,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:46,186 INFO L225 Difference]: With dead ends: 41 [2019-10-15 01:31:46,187 INFO L226 Difference]: Without dead ends: 27 [2019-10-15 01:31:46,188 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:31:46,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-15 01:31:46,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-10-15 01:31:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:31:46,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-15 01:31:46,213 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2019-10-15 01:31:46,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:46,214 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-15 01:31:46,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:31:46,215 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-15 01:31:46,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:31:46,217 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:46,217 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:46,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:46,426 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:46,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:46,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1740034220, now seen corresponding path program 1 times [2019-10-15 01:31:46,428 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:46,429 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873332187] [2019-10-15 01:31:46,429 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:46,430 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:46,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:31:46,564 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873332187] [2019-10-15 01:31:46,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679558794] [2019-10-15 01:31:46,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:46,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:31:46,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:46,741 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:31:46,812 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [860918940] [2019-10-15 01:31:46,871 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:31:46,872 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:46,881 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:46,898 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:46,899 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:47,125 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:47,362 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:47,398 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:47,406 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:47,853 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:47,854 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 14] total 25 [2019-10-15 01:31:47,854 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563816359] [2019-10-15 01:31:47,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:31:47,856 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:47,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:31:47,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:31:47,857 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 25 states. [2019-10-15 01:31:49,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:49,687 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2019-10-15 01:31:49,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-15 01:31:49,687 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 18 [2019-10-15 01:31:49,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:49,690 INFO L225 Difference]: With dead ends: 68 [2019-10-15 01:31:49,690 INFO L226 Difference]: Without dead ends: 54 [2019-10-15 01:31:49,692 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=553, Invalid=2869, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:31:49,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-15 01:31:49,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2019-10-15 01:31:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 01:31:49,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-15 01:31:49,713 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 18 [2019-10-15 01:31:49,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:49,714 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-15 01:31:49,714 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:31:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-15 01:31:49,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 01:31:49,715 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:49,715 INFO L380 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:49,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:49,920 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:49,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:49,921 INFO L82 PathProgramCache]: Analyzing trace with hash 156923604, now seen corresponding path program 2 times [2019-10-15 01:31:49,921 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:49,922 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607979762] [2019-10-15 01:31:49,922 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:49,922 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:49,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:31:50,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607979762] [2019-10-15 01:31:50,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060697057] [2019-10-15 01:31:50,081 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:50,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:31:50,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:50,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:31:50,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:31:50,209 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:31:50,268 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [544410302] [2019-10-15 01:31:50,269 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:31:50,270 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:50,270 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:50,270 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:50,271 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:50,319 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:50,479 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:50,497 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:50,503 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:50,944 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:50,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6, 14] total 30 [2019-10-15 01:31:50,945 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578722069] [2019-10-15 01:31:50,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-15 01:31:50,946 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:50,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-15 01:31:50,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2019-10-15 01:31:50,947 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 30 states. [2019-10-15 01:31:51,919 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2019-10-15 01:31:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:54,010 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2019-10-15 01:31:54,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-10-15 01:31:54,011 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 23 [2019-10-15 01:31:54,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:54,013 INFO L225 Difference]: With dead ends: 95 [2019-10-15 01:31:54,014 INFO L226 Difference]: Without dead ends: 74 [2019-10-15 01:31:54,017 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1066, Invalid=4940, Unknown=0, NotChecked=0, Total=6006 [2019-10-15 01:31:54,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-15 01:31:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 48. [2019-10-15 01:31:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-15 01:31:54,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2019-10-15 01:31:54,030 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 23 [2019-10-15 01:31:54,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:54,030 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2019-10-15 01:31:54,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-15 01:31:54,031 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2019-10-15 01:31:54,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:31:54,032 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:54,032 INFO L380 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:54,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:54,235 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:54,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:54,236 INFO L82 PathProgramCache]: Analyzing trace with hash 604204572, now seen corresponding path program 1 times [2019-10-15 01:31:54,236 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:54,237 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797403723] [2019-10-15 01:31:54,237 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:54,237 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:54,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:31:54,359 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797403723] [2019-10-15 01:31:54,359 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074839859] [2019-10-15 01:31:54,360 INFO L94 rtionOrderModulation]: Keeping assertion order 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 01:31:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:54,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:31:54,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:54,598 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:31:54,598 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:31:54,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2050595639] [2019-10-15 01:31:54,793 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:31:54,794 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:54,794 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:54,794 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:54,795 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:54,831 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:55,067 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:55,089 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:55,100 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:55,497 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:55,497 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 13] total 44 [2019-10-15 01:31:55,498 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087170981] [2019-10-15 01:31:55,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-15 01:31:55,499 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:55,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-15 01:31:55,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=1397, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:31:55,500 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 44 states. [2019-10-15 01:31:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:31:56,918 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2019-10-15 01:31:56,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-15 01:31:56,918 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 28 [2019-10-15 01:31:56,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:31:56,919 INFO L225 Difference]: With dead ends: 104 [2019-10-15 01:31:56,919 INFO L226 Difference]: Without dead ends: 71 [2019-10-15 01:31:56,921 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1168, Invalid=4684, Unknown=0, NotChecked=0, Total=5852 [2019-10-15 01:31:56,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-15 01:31:56,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2019-10-15 01:31:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-15 01:31:56,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2019-10-15 01:31:56,934 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 28 [2019-10-15 01:31:56,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:31:56,934 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2019-10-15 01:31:56,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-15 01:31:56,934 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2019-10-15 01:31:56,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-15 01:31:56,935 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:31:56,935 INFO L380 BasicCegarLoop]: trace histogram [20, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:31:57,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:31:57,137 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:31:57,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:31:57,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1318645069, now seen corresponding path program 2 times [2019-10-15 01:31:57,138 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:31:57,139 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084979222] [2019-10-15 01:31:57,139 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:57,139 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:31:57,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:31:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:31:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:31:57,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084979222] [2019-10-15 01:31:57,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241080605] [2019-10-15 01:31:57,503 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 01:31:57,587 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:31:57,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:31:57,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:31:57,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:31:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-15 01:31:57,743 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:31:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-15 01:31:57,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1054601135] [2019-10-15 01:31:57,942 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:31:57,942 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:31:57,943 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:31:57,943 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:31:57,943 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:31:58,006 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:31:58,199 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:31:58,214 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:31:58,221 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:31:58,699 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:31:58,699 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 10, 10, 13] total 50 [2019-10-15 01:31:58,699 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699989075] [2019-10-15 01:31:58,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-10-15 01:31:58,701 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:31:58,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-10-15 01:31:58,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=1913, Unknown=0, NotChecked=0, Total=2450 [2019-10-15 01:31:58,702 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 50 states. [2019-10-15 01:32:08,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:08,131 INFO L93 Difference]: Finished difference Result 179 states and 252 transitions. [2019-10-15 01:32:08,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2019-10-15 01:32:08,131 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 39 [2019-10-15 01:32:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:08,133 INFO L225 Difference]: With dead ends: 179 [2019-10-15 01:32:08,134 INFO L226 Difference]: Without dead ends: 145 [2019-10-15 01:32:08,142 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9331 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=5703, Invalid=23027, Unknown=0, NotChecked=0, Total=28730 [2019-10-15 01:32:08,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-10-15 01:32:08,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2019-10-15 01:32:08,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-15 01:32:08,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 120 transitions. [2019-10-15 01:32:08,163 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 120 transitions. Word has length 39 [2019-10-15 01:32:08,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:08,163 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 120 transitions. [2019-10-15 01:32:08,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-10-15 01:32:08,164 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 120 transitions. [2019-10-15 01:32:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-15 01:32:08,165 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:08,165 INFO L380 BasicCegarLoop]: trace histogram [24, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:08,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:08,370 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:08,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:08,370 INFO L82 PathProgramCache]: Analyzing trace with hash 200395476, now seen corresponding path program 3 times [2019-10-15 01:32:08,371 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:08,371 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539295310] [2019-10-15 01:32:08,371 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:08,371 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:08,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 01:32:08,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539295310] [2019-10-15 01:32:08,817 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497411552] [2019-10-15 01:32:08,817 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 01:32:08,900 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:08,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:08,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-15 01:32:08,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:09,372 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2019-10-15 01:32:09,498 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2019-10-15 01:32:09,849 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2019-10-15 01:32:15,984 WARN L191 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 84