/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/reducercommutativity/avg60-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:40:47,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:40:47,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:40:47,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:40:47,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:40:47,609 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:40:47,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:40:47,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:40:47,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:40:47,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:40:47,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:40:47,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:40:47,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:40:47,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:40:47,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:40:47,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:40:47,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:40:47,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:40:47,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:40:47,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:40:47,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:40:47,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:40:47,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:40:47,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:40:47,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:40:47,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:40:47,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:40:47,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:40:47,651 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 [2019-11-24 05:40:47,674 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:40:47,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:40:47,676 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:40:47,676 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:40:47,676 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:40:47,676 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:40:47,677 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:40:47,677 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:40:47,677 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:40:47,677 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:40:47,678 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:40:47,679 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:40:47,679 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:40:47,679 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:40:47,680 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:40:47,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:40:47,681 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:40:47,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:40:47,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:40:47,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:40:47,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:40:47,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:40:47,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:40:47,683 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:40:47,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:40:47,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:40:47,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:40:47,684 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:40:47,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:40:47,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:40:47,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:40:47,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:40:47,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:40:47,686 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:40:47,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:40:47,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:40:47,687 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:40:47,688 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:40:48,013 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:40:48,033 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:40:48,037 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:40:48,039 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:40:48,039 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:40:48,040 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg60-1.i [2019-11-24 05:40:48,119 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eda268e06/e1d489b458544e1e9ad8c9bf98706613/FLAG71e643192 [2019-11-24 05:40:48,566 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:40:48,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg60-1.i [2019-11-24 05:40:48,573 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eda268e06/e1d489b458544e1e9ad8c9bf98706613/FLAG71e643192 [2019-11-24 05:40:48,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eda268e06/e1d489b458544e1e9ad8c9bf98706613 [2019-11-24 05:40:48,976 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:40:48,978 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:40:48,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:40:48,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:40:48,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:40:48,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:40:48" (1/1) ... [2019-11-24 05:40:48,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b35c066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:48, skipping insertion in model container [2019-11-24 05:40:48,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:40:48" (1/1) ... [2019-11-24 05:40:48,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:40:49,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:40:49,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:40:49,210 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:40:49,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:40:49,245 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:40:49,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:49 WrapperNode [2019-11-24 05:40:49,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:40:49,247 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:40:49,247 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:40:49,247 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:40:49,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:49" (1/1) ... [2019-11-24 05:40:49,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:49" (1/1) ... [2019-11-24 05:40:49,382 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:40:49,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:40:49,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:40:49,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:40:49,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:49" (1/1) ... [2019-11-24 05:40:49,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:49" (1/1) ... [2019-11-24 05:40:49,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:49" (1/1) ... [2019-11-24 05:40:49,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:49" (1/1) ... [2019-11-24 05:40:49,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:49" (1/1) ... [2019-11-24 05:40:49,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:49" (1/1) ... [2019-11-24 05:40:49,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:49" (1/1) ... [2019-11-24 05:40:49,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:40:49,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:40:49,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:40:49,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:40:49,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:49" (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 [2019-11-24 05:40:49,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 05:40:49,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:40:49,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:40:49,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 05:40:49,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:40:49,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 05:40:49,981 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:40:49,981 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-24 05:40:49,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:40:49 BoogieIcfgContainer [2019-11-24 05:40:49,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:40:49,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:40:49,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:40:49,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:40:49,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:40:48" (1/3) ... [2019-11-24 05:40:49,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64e3f96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:40:49, skipping insertion in model container [2019-11-24 05:40:49,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:49" (2/3) ... [2019-11-24 05:40:49,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64e3f96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:40:49, skipping insertion in model container [2019-11-24 05:40:49,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:40:49" (3/3) ... [2019-11-24 05:40:49,992 INFO L109 eAbstractionObserver]: Analyzing ICFG avg60-1.i [2019-11-24 05:40:50,002 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:40:50,009 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 05:40:50,019 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 05:40:50,038 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:40:50,039 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:40:50,039 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:40:50,039 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:40:50,039 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:40:50,039 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:40:50,040 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:40:50,040 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:40:50,051 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-24 05:40:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:40:50,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:40:50,059 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:40:50,059 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:40:50,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:40:50,065 INFO L82 PathProgramCache]: Analyzing trace with hash 652281750, now seen corresponding path program 1 times [2019-11-24 05:40:50,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:40:50,073 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066183707] [2019-11-24 05:40:50,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:40:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:40:50,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066183707] [2019-11-24 05:40:50,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:40:50,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:40:50,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430589519] [2019-11-24 05:40:50,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:40:50,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:40:50,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:40:50,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:40:50,259 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-24 05:40:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:40:50,293 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-24 05:40:50,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:40:50,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:40:50,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:40:50,307 INFO L225 Difference]: With dead ends: 21 [2019-11-24 05:40:50,307 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 05:40:50,311 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:40:50,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 05:40:50,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-24 05:40:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-24 05:40:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2019-11-24 05:40:50,354 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2019-11-24 05:40:50,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:40:50,355 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2019-11-24 05:40:50,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:40:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2019-11-24 05:40:50,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 05:40:50,356 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:40:50,356 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:40:50,357 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:40:50,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:40:50,357 INFO L82 PathProgramCache]: Analyzing trace with hash 184277197, now seen corresponding path program 1 times [2019-11-24 05:40:50,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:40:50,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424789895] [2019-11-24 05:40:50,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:40:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:40:50,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424789895] [2019-11-24 05:40:50,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110391787] [2019-11-24 05:40:50,425 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 [2019-11-24 05:40:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:50,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:40:50,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:40:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 05:40:50,530 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:40:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 05:40:50,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:40:50,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:40:50,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238666117] [2019-11-24 05:40:50,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:40:50,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:40:50,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:40:50,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:40:50,555 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2019-11-24 05:40:50,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:40:50,617 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2019-11-24 05:40:50,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:40:50,618 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-24 05:40:50,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:40:50,619 INFO L225 Difference]: With dead ends: 22 [2019-11-24 05:40:50,619 INFO L226 Difference]: Without dead ends: 16 [2019-11-24 05:40:50,620 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:40:50,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-24 05:40:50,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-24 05:40:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-24 05:40:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-24 05:40:50,625 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-11-24 05:40:50,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:40:50,625 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-24 05:40:50,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:40:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-24 05:40:50,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:40:50,626 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:40:50,626 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:40:50,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:40:50,831 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:40:50,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:40:50,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1226965997, now seen corresponding path program 1 times [2019-11-24 05:40:50,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:40:50,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600714849] [2019-11-24 05:40:50,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:40:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-24 05:40:50,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600714849] [2019-11-24 05:40:50,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650256132] [2019-11-24 05:40:50,906 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 [2019-11-24 05:40:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:51,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:40:51,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:40:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 05:40:51,020 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:40:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 05:40:51,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:40:51,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:40:51,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497824276] [2019-11-24 05:40:51,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:40:51,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:40:51,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:40:51,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:40:51,041 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-24 05:40:51,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:40:51,063 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-24 05:40:51,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:40:51,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-24 05:40:51,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:40:51,064 INFO L225 Difference]: With dead ends: 24 [2019-11-24 05:40:51,064 INFO L226 Difference]: Without dead ends: 18 [2019-11-24 05:40:51,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:40:51,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-24 05:40:51,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-24 05:40:51,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-24 05:40:51,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-24 05:40:51,083 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2019-11-24 05:40:51,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:40:51,083 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-24 05:40:51,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:40:51,084 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-24 05:40:51,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 05:40:51,084 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:40:51,085 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:40:51,289 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:40:51,289 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:40:51,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:40:51,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1575042285, now seen corresponding path program 1 times [2019-11-24 05:40:51,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:40:51,291 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367333392] [2019-11-24 05:40:51,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:40:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 05:40:51,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367333392] [2019-11-24 05:40:51,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190054043] [2019-11-24 05:40:51,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-24 05:40:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:51,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:40:51,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:40:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 05:40:51,407 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:40:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 05:40:51,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2075580779] [2019-11-24 05:40:51,492 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 05:40:51,493 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:40:51,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:40:51,505 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:40:51,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:41:03,788 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 192 [2019-11-24 05:41:04,044 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 193 [2019-11-24 05:41:04,287 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 196 [2019-11-24 05:41:12,822 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 226 [2019-11-24 05:41:26,411 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 274 [2019-11-24 05:41:28,327 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2019-11-24 05:41:28,448 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 278 [2019-11-24 05:41:30,806 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2019-11-24 05:41:30,934 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 288 [2019-11-24 05:41:42,510 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 213 [2019-11-24 05:41:42,632 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2019-11-24 05:41:42,918 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2019-11-24 05:41:43,142 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 337 [2019-11-24 05:41:43,386 WARN L192 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 416 [2019-11-24 05:41:43,716 WARN L192 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 409 [2019-11-24 05:41:44,036 WARN L192 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 402 [2019-11-24 05:41:44,314 WARN L192 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 403 [2019-11-24 05:41:44,755 WARN L192 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 500 [2019-11-24 05:41:45,221 WARN L192 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 501 DAG size of output: 501 [2019-11-24 05:41:45,975 WARN L192 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 625 DAG size of output: 624 [2019-11-24 05:41:46,906 WARN L192 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 618 DAG size of output: 615 [2019-11-24 05:41:48,039 WARN L192 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 766 DAG size of output: 765 [2019-11-24 05:41:49,339 WARN L192 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 759 DAG size of output: 759 [2019-11-24 05:41:51,097 WARN L192 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 921 DAG size of output: 920 [2019-11-24 05:41:53,043 WARN L192 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 914 DAG size of output: 913 [2019-11-24 05:41:55,802 WARN L192 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 1143 DAG size of output: 1141 [2019-11-24 05:41:59,063 WARN L192 SmtUtils]: Spent 2.97 s on a formula simplification. DAG size of input: 1135 DAG size of output: 1130 [2019-11-24 05:42:03,484 WARN L192 SmtUtils]: Spent 4.36 s on a formula simplification. DAG size of input: 1404 DAG size of output: 1402 [2019-11-24 05:42:08,458 WARN L192 SmtUtils]: Spent 4.62 s on a formula simplification. DAG size of input: 1402 DAG size of output: 1401 [2019-11-24 05:42:16,258 WARN L192 SmtUtils]: Spent 7.71 s on a formula simplification. DAG size of input: 1839 DAG size of output: 1837