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/loop-crafted/simple_array_index_value_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:01:17,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:01:17,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:01:17,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:01:17,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:01:17,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:01:17,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:01:17,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:01:17,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:01:17,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:01:17,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:01:17,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:01:17,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:01:17,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:01:17,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:01:17,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:01:17,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:01:17,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:01:17,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:01:17,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:01:17,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:01:17,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:01:17,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:01:17,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:01:17,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:01:17,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:01:17,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:01:17,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:01:17,223 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 03:01:17,240 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:01:17,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:01:17,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:01:17,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:01:17,246 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:01:17,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:01:17,246 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:01:17,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:01:17,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:01:17,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:01:17,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:01:17,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:01:17,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:01:17,248 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:01:17,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:01:17,248 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:01:17,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:01:17,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:01:17,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:01:17,250 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:01:17,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:01:17,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:01:17,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:01:17,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:01:17,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:01:17,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:01:17,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:01:17,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:01:17,252 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 03:01:17,514 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:01:17,534 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:01:17,537 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:01:17,539 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:01:17,540 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:01:17,540 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2019-10-15 03:01:17,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f67449941/1a51f2e668da4b9d842074ea27dd5452/FLAG603752d6d [2019-10-15 03:01:18,059 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:01:18,062 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2019-10-15 03:01:18,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f67449941/1a51f2e668da4b9d842074ea27dd5452/FLAG603752d6d [2019-10-15 03:01:18,470 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f67449941/1a51f2e668da4b9d842074ea27dd5452 [2019-10-15 03:01:18,480 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:01:18,482 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:01:18,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:01:18,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:01:18,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:01:18,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:01:18" (1/1) ... [2019-10-15 03:01:18,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db268e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:18, skipping insertion in model container [2019-10-15 03:01:18,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:01:18" (1/1) ... [2019-10-15 03:01:18,498 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:01:18,511 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:01:18,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:01:18,682 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:01:18,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:01:18,727 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:01:18,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:18 WrapperNode [2019-10-15 03:01:18,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:01:18,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:01:18,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:01:18,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:01:18,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:18" (1/1) ... [2019-10-15 03:01:18,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:18" (1/1) ... [2019-10-15 03:01:18,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:18" (1/1) ... [2019-10-15 03:01:18,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:18" (1/1) ... [2019-10-15 03:01:18,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:18" (1/1) ... [2019-10-15 03:01:18,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:18" (1/1) ... [2019-10-15 03:01:18,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:18" (1/1) ... [2019-10-15 03:01:18,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:01:18,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:01:18,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:01:18,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:01:18,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:18" (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 03:01:18,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:01:18,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:01:18,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:01:18,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:01:18,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:01:18,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:01:18,905 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:01:18,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:01:18,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:01:18,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:01:18,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:01:18,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:01:18,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:01:21,210 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:01:21,211 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 03:01:21,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:01:21 BoogieIcfgContainer [2019-10-15 03:01:21,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:01:21,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:01:21,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:01:21,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:01:21,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:01:18" (1/3) ... [2019-10-15 03:01:21,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47610301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:01:21, skipping insertion in model container [2019-10-15 03:01:21,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:18" (2/3) ... [2019-10-15 03:01:21,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47610301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:01:21, skipping insertion in model container [2019-10-15 03:01:21,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:01:21" (3/3) ... [2019-10-15 03:01:21,230 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2019-10-15 03:01:21,252 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:01:21,268 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:01:21,287 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:01:21,320 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:01:21,320 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:01:21,320 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:01:21,321 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:01:21,321 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:01:21,321 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:01:21,321 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:01:21,321 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:01:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-15 03:01:21,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 03:01:21,341 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:21,342 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:21,344 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:21,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:21,350 INFO L82 PathProgramCache]: Analyzing trace with hash 650459106, now seen corresponding path program 1 times [2019-10-15 03:01:21,357 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:21,358 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933141712] [2019-10-15 03:01:21,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:21,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:21,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:21,549 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 03:01:21,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933141712] [2019-10-15 03:01:21,551 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:01:21,552 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:01:21,552 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914171513] [2019-10-15 03:01:21,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:01:21,560 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:21,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:01:21,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:01:21,580 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-10-15 03:01:21,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:21,712 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-10-15 03:01:21,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:01:21,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 03:01:21,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:21,728 INFO L225 Difference]: With dead ends: 44 [2019-10-15 03:01:21,728 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 03:01:21,736 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 03:01:21,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 03:01:21,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2019-10-15 03:01:21,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 03:01:21,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-15 03:01:21,790 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-10-15 03:01:21,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:21,791 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-15 03:01:21,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:01:21,791 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-15 03:01:21,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 03:01:21,793 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:21,793 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:21,794 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:21,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:21,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1252105718, now seen corresponding path program 1 times [2019-10-15 03:01:21,795 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:21,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065055903] [2019-10-15 03:01:21,795 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:21,795 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:21,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:21,939 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 03:01:21,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065055903] [2019-10-15 03:01:21,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780150975] [2019-10-15 03:01:21,940 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 03:01:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:21,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-15 03:01:21,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:22,055 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-15 03:01:22,056 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 03:01:22,061 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 03:01:22,061 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 03:01:22,062 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-10-15 03:01:22,116 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-15 03:01:22,117 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 03:01:22,121 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 03:01:22,121 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 03:01:22,121 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-10-15 03:01:22,165 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 03:01:22,166 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:22,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:22,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:22,432 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:22,440 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:01:22,476 WARN L225 Elim1Store]: Array PQE input equivalent to true [2019-10-15 03:01:22,477 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 03:01:22,548 INFO L567 ElimStorePlain]: treesize reduction 174, result has 13.4 percent of original size [2019-10-15 03:01:22,562 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2019-10-15 03:01:22,573 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2019-10-15 03:01:22,575 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2019-10-15 03:01:22,581 INFO L567 ElimStorePlain]: treesize reduction 6, result has 60.0 percent of original size [2019-10-15 03:01:22,582 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-15 03:01:22,587 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 03:01:22,588 INFO L464 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2019-10-15 03:01:22,588 INFO L464 ElimStorePlain]: Eliminatee |#memory_int| vanished before elimination [2019-10-15 03:01:22,589 INFO L496 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-15 03:01:22,589 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:247, output treesize:16 [2019-10-15 03:01:22,618 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 03:01:22,619 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [697015786] [2019-10-15 03:01:22,642 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 03:01:22,643 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:22,648 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:22,656 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:22,657 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:22,820 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:23,191 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:23,198 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:23,214 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:23,229 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:23,295 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2019-10-15 03:01:23,309 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:23,315 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:24,157 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:24,157 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 9, 10] total 26 [2019-10-15 03:01:24,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034147273] [2019-10-15 03:01:24,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 03:01:24,161 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:24,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 03:01:24,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2019-10-15 03:01:24,170 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 26 states. [2019-10-15 03:01:25,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:25,477 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2019-10-15 03:01:25,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 03:01:25,478 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 13 [2019-10-15 03:01:25,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:25,480 INFO L225 Difference]: With dead ends: 51 [2019-10-15 03:01:25,480 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 03:01:25,481 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2019-10-15 03:01:25,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 03:01:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2019-10-15 03:01:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 03:01:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-15 03:01:25,490 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 13 [2019-10-15 03:01:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:25,491 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-15 03:01:25,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 03:01:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-15 03:01:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 03:01:25,492 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:25,492 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:25,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:25,693 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:25,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:25,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1155484890, now seen corresponding path program 1 times [2019-10-15 03:01:25,695 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:25,695 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526580223] [2019-10-15 03:01:25,695 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:25,695 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:25,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:25,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:01:25,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526580223] [2019-10-15 03:01:25,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643727406] [2019-10-15 03:01:25,806 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 03:01:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:25,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-15 03:01:25,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:25,876 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:25,881 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:25,893 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:25,896 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:25,899 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:26,238 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:30,775 WARN L225 Elim1Store]: Array PQE input equivalent to true [2019-10-15 03:01:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:31,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1161292678] [2019-10-15 03:01:31,003 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 03:01:31,003 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:31,003 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:31,004 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:31,004 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:31,030 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:01:31,095 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:31,104 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:31,125 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:31,134 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:31,143 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:31,222 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:31,227 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:31,265 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:31,273 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-15 03:01:31,670 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 165 for LOIs [2019-10-15 03:01:31,693 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:01:31,698 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:32,035 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 167 [2019-10-15 03:01:36,411 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:36,413 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 11, 11] total 34 [2019-10-15 03:01:36,413 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476852114] [2019-10-15 03:01:36,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-15 03:01:36,415 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:36,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-15 03:01:36,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1002, Unknown=3, NotChecked=0, Total=1122 [2019-10-15 03:01:36,416 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 34 states. [2019-10-15 03:01:37,967 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 191 [2019-10-15 03:01:40,668 WARN L191 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 193 [2019-10-15 03:01:53,392 WARN L191 SmtUtils]: Spent 10.53 s on a formula simplification. DAG size of input: 198 DAG size of output: 197 [2019-10-15 03:01:56,445 WARN L191 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 192 DAG size of output: 192 [2019-10-15 03:02:03,711 WARN L191 SmtUtils]: Spent 6.21 s on a formula simplification. DAG size of input: 196 DAG size of output: 196