/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/rewnifrev.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:28:45,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:28:45,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:28:45,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:28:45,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:28:45,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:28:45,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:28:45,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:28:45,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:28:45,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:28:45,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:28:45,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:28:45,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:28:45,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:28:45,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:28:45,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:28:45,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:28:45,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:28:45,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:28:45,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:28:45,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:28:45,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:28:45,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:28:45,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:28:45,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:28:45,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 23:28:45,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 23:28:45,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 23:28:45,602 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-23 23:28:45,643 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:28:45,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:28:45,644 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:28:45,644 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:28:45,645 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:28:45,645 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:28:45,645 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:28:45,645 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:28:45,645 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:28:45,646 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:28:45,646 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:28:45,646 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:28:45,646 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:28:45,646 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:28:45,646 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:28:45,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:28:45,651 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:28:45,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:28:45,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:28:45,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:28:45,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:28:45,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:28:45,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:28:45,653 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:28:45,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:28:45,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:28:45,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:28:45,654 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:28:45,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:28:45,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:28:45,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:28:45,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:28:45,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:28:45,655 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:28:45,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:28:45,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:28:45,656 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:28:45,656 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:28:45,926 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:28:45,945 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:28:45,949 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:28:45,950 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:28:45,951 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:28:45,951 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/rewnifrev.c [2019-11-23 23:28:46,023 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f8f7e592/facdd8ad28384702a6223a755abda458/FLAG89b5c28c2 [2019-11-23 23:28:46,480 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:28:46,480 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rewnifrev.c [2019-11-23 23:28:46,487 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f8f7e592/facdd8ad28384702a6223a755abda458/FLAG89b5c28c2 [2019-11-23 23:28:46,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f8f7e592/facdd8ad28384702a6223a755abda458 [2019-11-23 23:28:46,871 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:28:46,872 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:28:46,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:28:46,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:28:46,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:28:46,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:28:46" (1/1) ... [2019-11-23 23:28:46,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@abb20bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:28:46, skipping insertion in model container [2019-11-23 23:28:46,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:28:46" (1/1) ... [2019-11-23 23:28:46,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:28:46,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:28:47,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:28:47,093 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:28:47,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:28:47,125 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:28:47,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:28:47 WrapperNode [2019-11-23 23:28:47,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:28:47,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:28:47,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:28:47,127 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:28:47,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:28:47" (1/1) ... [2019-11-23 23:28:47,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:28:47" (1/1) ... [2019-11-23 23:28:47,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:28:47,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:28:47,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:28:47,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:28:47,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:28:47" (1/1) ... [2019-11-23 23:28:47,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:28:47" (1/1) ... [2019-11-23 23:28:47,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:28:47" (1/1) ... [2019-11-23 23:28:47,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:28:47" (1/1) ... [2019-11-23 23:28:47,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:28:47" (1/1) ... [2019-11-23 23:28:47,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:28:47" (1/1) ... [2019-11-23 23:28:47,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:28:47" (1/1) ... [2019-11-23 23:28:47,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:28:47,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:28:47,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:28:47,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:28:47,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:28:47" (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 [2019-11-23 23:28:47,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:28:47,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 23:28:47,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:28:47,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:28:47,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:28:47,679 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:28:47,680 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 23:28:47,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:28:47 BoogieIcfgContainer [2019-11-23 23:28:47,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:28:47,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:28:47,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:28:47,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:28:47,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:28:46" (1/3) ... [2019-11-23 23:28:47,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@185209d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:28:47, skipping insertion in model container [2019-11-23 23:28:47,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:28:47" (2/3) ... [2019-11-23 23:28:47,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@185209d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:28:47, skipping insertion in model container [2019-11-23 23:28:47,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:28:47" (3/3) ... [2019-11-23 23:28:47,690 INFO L109 eAbstractionObserver]: Analyzing ICFG rewnifrev.c [2019-11-23 23:28:47,699 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:28:47,707 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:28:47,720 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:28:47,745 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:28:47,745 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:28:47,745 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:28:47,746 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:28:47,746 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:28:47,746 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:28:47,746 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:28:47,746 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:28:47,758 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-23 23:28:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:28:47,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:28:47,765 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:28:47,765 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:28:47,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:28:47,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1768984337, now seen corresponding path program 1 times [2019-11-23 23:28:47,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:28:47,780 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515121553] [2019-11-23 23:28:47,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:28:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:28:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:28:47,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515121553] [2019-11-23 23:28:47,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:28:47,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:28:47,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595501130] [2019-11-23 23:28:47,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:28:47,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:28:47,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:28:47,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:28:47,969 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2019-11-23 23:28:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:28:48,033 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2019-11-23 23:28:48,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:28:48,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:28:48,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:28:48,044 INFO L225 Difference]: With dead ends: 18 [2019-11-23 23:28:48,044 INFO L226 Difference]: Without dead ends: 9 [2019-11-23 23:28:48,048 INFO L630 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 [2019-11-23 23:28:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-23 23:28:48,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-23 23:28:48,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 23:28:48,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-23 23:28:48,079 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2019-11-23 23:28:48,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:28:48,080 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-23 23:28:48,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:28:48,080 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-23 23:28:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:28:48,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:28:48,081 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:28:48,082 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:28:48,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:28:48,082 INFO L82 PathProgramCache]: Analyzing trace with hash 995163765, now seen corresponding path program 1 times [2019-11-23 23:28:48,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:28:48,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769977627] [2019-11-23 23:28:48,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:28:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:28:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:28:48,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769977627] [2019-11-23 23:28:48,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018482173] [2019-11-23 23:28:48,144 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 [2019-11-23 23:28:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:28:48,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 23:28:48,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:28:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:28:48,218 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:28:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:28:48,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1653272376] [2019-11-23 23:28:48,256 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:28:48,257 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:28:48,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:28:48,271 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:28:48,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:28:48,517 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:48,847 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:49,258 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:50,348 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:52,293 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:52,849 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-23 23:28:53,132 WARN L192 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 44 [2019-11-23 23:28:53,464 WARN L192 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 31 [2019-11-23 23:28:53,672 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 27 [2019-11-23 23:28:53,891 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 43 [2019-11-23 23:28:53,895 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 23:28:53,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-23 23:28:53,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2019-11-23 23:28:53,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961075407] [2019-11-23 23:28:53,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:28:53,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:28:53,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:28:53,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-23 23:28:53,902 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2019-11-23 23:28:53,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:28:53,932 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-11-23 23:28:53,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:28:53,933 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 23:28:53,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:28:53,934 INFO L225 Difference]: With dead ends: 20 [2019-11-23 23:28:53,934 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 23:28:53,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-23 23:28:53,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 23:28:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2019-11-23 23:28:53,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 23:28:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-11-23 23:28:53,939 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2019-11-23 23:28:53,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:28:53,939 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-11-23 23:28:53,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:28:53,940 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-11-23 23:28:53,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:28:53,940 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:28:53,940 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-11-23 23:28:54,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:28:54,160 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:28:54,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:28:54,160 INFO L82 PathProgramCache]: Analyzing trace with hash 784409007, now seen corresponding path program 2 times [2019-11-23 23:28:54,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:28:54,163 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145025369] [2019-11-23 23:28:54,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:28:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:28:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:28:54,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145025369] [2019-11-23 23:28:54,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:28:54,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 23:28:54,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211205334] [2019-11-23 23:28:54,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 23:28:54,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:28:54,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 23:28:54,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 23:28:54,409 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 6 states. [2019-11-23 23:28:54,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:28:54,512 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-11-23 23:28:54,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 23:28:54,513 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-11-23 23:28:54,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:28:54,514 INFO L225 Difference]: With dead ends: 15 [2019-11-23 23:28:54,514 INFO L226 Difference]: Without dead ends: 13 [2019-11-23 23:28:54,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-11-23 23:28:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-23 23:28:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-11-23 23:28:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:28:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-11-23 23:28:54,523 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2019-11-23 23:28:54,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:28:54,524 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-23 23:28:54,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 23:28:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-11-23 23:28:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 23:28:54,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:28:54,525 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:28:54,526 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:28:54,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:28:54,526 INFO L82 PathProgramCache]: Analyzing trace with hash -583112505, now seen corresponding path program 1 times [2019-11-23 23:28:54,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:28:54,527 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875910921] [2019-11-23 23:28:54,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:28:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:28:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:28:54,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875910921] [2019-11-23 23:28:54,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747133522] [2019-11-23 23:28:54,842 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 [2019-11-23 23:28:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:28:54,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 23:28:54,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:28:55,340 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2019-11-23 23:28:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:28:55,697 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:28:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:28:55,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1708238848] [2019-11-23 23:28:55,992 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-23 23:28:55,993 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:28:55,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:28:55,995 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:28:55,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:28:56,119 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:56,213 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:56,474 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:57,465 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:58,478 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 23:28:59,577 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 221 [2019-11-23 23:28:59,790 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2019-11-23 23:29:00,055 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 278 [2019-11-23 23:29:00,559 WARN L192 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2019-11-23 23:29:01,085 WARN L192 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 320 [2019-11-23 23:29:01,463 WARN L192 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 303 [2019-11-23 23:29:01,675 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 303 [2019-11-23 23:29:02,032 WARN L192 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 383 [2019-11-23 23:29:02,367 WARN L192 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 383 [2019-11-23 23:29:02,944 WARN L192 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 512 [2019-11-23 23:29:03,513 WARN L192 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 492 [2019-11-23 23:29:04,387 WARN L192 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 649 [2019-11-23 23:29:05,235 WARN L192 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 647 [2019-11-23 23:29:06,662 WARN L192 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 894 DAG size of output: 887 [2019-11-23 23:29:08,181 WARN L192 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 884 DAG size of output: 884 [2019-11-23 23:29:10,762 WARN L192 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 1224 DAG size of output: 1218 [2019-11-23 23:29:13,569 WARN L192 SmtUtils]: Spent 2.51 s on a formula simplification. DAG size of input: 1214 DAG size of output: 1211 [2019-11-23 23:29:18,556 WARN L192 SmtUtils]: Spent 4.80 s on a formula simplification. DAG size of input: 1673 DAG size of output: 1666 [2019-11-23 23:29:23,361 WARN L192 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 1666 DAG size of output: 1665 [2019-11-23 23:29:31,683 WARN L192 SmtUtils]: Spent 8.10 s on a formula simplification. DAG size of input: 2293 DAG size of output: 2283 [2019-11-23 23:29:40,701 WARN L192 SmtUtils]: Spent 8.34 s on a formula simplification. DAG size of input: 2277 DAG size of output: 2277 [2019-11-23 23:29:55,764 WARN L192 SmtUtils]: Spent 14.77 s on a formula simplification. DAG size of input: 3217 DAG size of output: 3205 [2019-11-23 23:30:12,462 WARN L192 SmtUtils]: Spent 15.63 s on a formula simplification. DAG size of input: 3187 DAG size of output: 3184