/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/forester-heap/sll-reverse_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 00:35:47,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 00:35:47,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 00:35:47,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 00:35:47,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 00:35:47,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 00:35:47,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 00:35:47,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 00:35:47,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 00:35:47,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 00:35:47,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 00:35:47,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 00:35:47,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 00:35:47,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 00:35:47,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 00:35:47,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 00:35:47,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 00:35:47,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 00:35:47,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 00:35:47,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 00:35:47,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 00:35:47,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 00:35:47,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 00:35:47,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 00:35:47,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 00:35:47,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 00:35:47,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 00:35:47,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 00:35:47,454 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 00:35:47,471 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 00:35:47,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 00:35:47,472 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 00:35:47,472 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 00:35:47,473 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 00:35:47,473 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 00:35:47,473 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 00:35:47,473 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 00:35:47,473 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 00:35:47,474 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 00:35:47,474 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 00:35:47,474 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 00:35:47,474 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 00:35:47,474 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 00:35:47,475 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 00:35:47,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 00:35:47,475 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 00:35:47,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 00:35:47,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 00:35:47,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 00:35:47,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 00:35:47,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 00:35:47,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 00:35:47,477 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 00:35:47,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 00:35:47,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 00:35:47,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 00:35:47,477 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 00:35:47,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 00:35:47,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 00:35:47,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 00:35:47,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 00:35:47,478 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 00:35:47,479 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 00:35:47,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 00:35:47,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 00:35:47,479 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 00:35:47,479 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 00:35:47,760 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 00:35:47,781 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 00:35:47,785 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 00:35:47,786 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 00:35:47,786 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 00:35:47,788 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-reverse_simple.i [2019-11-24 00:35:47,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80141ed2d/2cb3da50be7f4e2e85dbf672916b75d7/FLAG911729652 [2019-11-24 00:35:48,336 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 00:35:48,337 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/sll-reverse_simple.i [2019-11-24 00:35:48,352 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80141ed2d/2cb3da50be7f4e2e85dbf672916b75d7/FLAG911729652 [2019-11-24 00:35:48,694 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80141ed2d/2cb3da50be7f4e2e85dbf672916b75d7 [2019-11-24 00:35:48,703 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 00:35:48,705 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 00:35:48,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 00:35:48,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 00:35:48,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 00:35:48,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:35:48" (1/1) ... [2019-11-24 00:35:48,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f7221ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:35:48, skipping insertion in model container [2019-11-24 00:35:48,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:35:48" (1/1) ... [2019-11-24 00:35:48,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 00:35:48,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 00:35:49,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 00:35:49,223 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 00:35:49,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 00:35:49,355 INFO L208 MainTranslator]: Completed translation [2019-11-24 00:35:49,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:35:49 WrapperNode [2019-11-24 00:35:49,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 00:35:49,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 00:35:49,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 00:35:49,356 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 00:35:49,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:35:49" (1/1) ... [2019-11-24 00:35:49,385 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:35:49" (1/1) ... [2019-11-24 00:35:49,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 00:35:49,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 00:35:49,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 00:35:49,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 00:35:49,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:35:49" (1/1) ... [2019-11-24 00:35:49,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:35:49" (1/1) ... [2019-11-24 00:35:49,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:35:49" (1/1) ... [2019-11-24 00:35:49,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:35:49" (1/1) ... [2019-11-24 00:35:49,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:35:49" (1/1) ... [2019-11-24 00:35:49,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:35:49" (1/1) ... [2019-11-24 00:35:49,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:35:49" (1/1) ... [2019-11-24 00:35:49,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 00:35:49,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 00:35:49,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 00:35:49,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 00:35:49,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:35:49" (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 00:35:49,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 00:35:49,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 00:35:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 00:35:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 00:35:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 00:35:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 00:35:49,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 00:35:49,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 00:35:50,409 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 00:35:50,409 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-24 00:35:50,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:35:50 BoogieIcfgContainer [2019-11-24 00:35:50,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 00:35:50,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 00:35:50,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 00:35:50,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 00:35:50,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 12:35:48" (1/3) ... [2019-11-24 00:35:50,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61509c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:35:50, skipping insertion in model container [2019-11-24 00:35:50,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:35:49" (2/3) ... [2019-11-24 00:35:50,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61509c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:35:50, skipping insertion in model container [2019-11-24 00:35:50,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:35:50" (3/3) ... [2019-11-24 00:35:50,420 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-reverse_simple.i [2019-11-24 00:35:50,429 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 00:35:50,435 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-24 00:35:50,444 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-24 00:35:50,470 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 00:35:50,470 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 00:35:50,470 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 00:35:50,470 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 00:35:50,471 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 00:35:50,471 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 00:35:50,471 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 00:35:50,471 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 00:35:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-24 00:35:50,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 00:35:50,494 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 00:35:50,495 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 00:35:50,495 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 00:35:50,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 00:35:50,502 INFO L82 PathProgramCache]: Analyzing trace with hash 986255260, now seen corresponding path program 1 times [2019-11-24 00:35:50,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 00:35:50,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619199897] [2019-11-24 00:35:50,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 00:35:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:35:50,651 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 00:35:50,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619199897] [2019-11-24 00:35:50,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 00:35:50,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 00:35:50,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131702727] [2019-11-24 00:35:50,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 00:35:50,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 00:35:50,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 00:35:50,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 00:35:50,678 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-11-24 00:35:50,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 00:35:50,702 INFO L93 Difference]: Finished difference Result 47 states and 75 transitions. [2019-11-24 00:35:50,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 00:35:50,704 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-11-24 00:35:50,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 00:35:50,715 INFO L225 Difference]: With dead ends: 47 [2019-11-24 00:35:50,716 INFO L226 Difference]: Without dead ends: 23 [2019-11-24 00:35:50,719 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 00:35:50,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-24 00:35:50,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-24 00:35:50,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-24 00:35:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-11-24 00:35:50,760 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2019-11-24 00:35:50,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 00:35:50,761 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-11-24 00:35:50,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 00:35:50,761 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-11-24 00:35:50,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 00:35:50,762 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 00:35:50,762 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 00:35:50,763 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 00:35:50,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 00:35:50,764 INFO L82 PathProgramCache]: Analyzing trace with hash 778217614, now seen corresponding path program 1 times [2019-11-24 00:35:50,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 00:35:50,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176900577] [2019-11-24 00:35:50,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 00:35:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:35:50,959 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 00:35:50,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176900577] [2019-11-24 00:35:50,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 00:35:50,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 00:35:50,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203599934] [2019-11-24 00:35:50,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 00:35:50,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 00:35:50,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 00:35:50,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 00:35:50,964 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2019-11-24 00:35:51,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 00:35:51,486 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2019-11-24 00:35:51,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 00:35:51,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-24 00:35:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 00:35:51,488 INFO L225 Difference]: With dead ends: 52 [2019-11-24 00:35:51,489 INFO L226 Difference]: Without dead ends: 33 [2019-11-24 00:35:51,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-24 00:35:51,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-24 00:35:51,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2019-11-24 00:35:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-24 00:35:51,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-24 00:35:51,503 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 8 [2019-11-24 00:35:51,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 00:35:51,504 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-24 00:35:51,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 00:35:51,505 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-24 00:35:51,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 00:35:51,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 00:35:51,507 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 00:35:51,507 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 00:35:51,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 00:35:51,508 INFO L82 PathProgramCache]: Analyzing trace with hash 778216364, now seen corresponding path program 1 times [2019-11-24 00:35:51,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 00:35:51,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113214444] [2019-11-24 00:35:51,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 00:35:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:35:51,570 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 00:35:51,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113214444] [2019-11-24 00:35:51,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 00:35:51,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 00:35:51,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918562339] [2019-11-24 00:35:51,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 00:35:51,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 00:35:51,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 00:35:51,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 00:35:51,576 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 4 states. [2019-11-24 00:35:51,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 00:35:51,663 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2019-11-24 00:35:51,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 00:35:51,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-24 00:35:51,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 00:35:51,665 INFO L225 Difference]: With dead ends: 47 [2019-11-24 00:35:51,665 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 00:35:51,666 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 00:35:51,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 00:35:51,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2019-11-24 00:35:51,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-24 00:35:51,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-11-24 00:35:51,673 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 8 [2019-11-24 00:35:51,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 00:35:51,673 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-11-24 00:35:51,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 00:35:51,673 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-11-24 00:35:51,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-24 00:35:51,674 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 00:35:51,674 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 00:35:51,675 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 00:35:51,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 00:35:51,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1173563751, now seen corresponding path program 1 times [2019-11-24 00:35:51,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 00:35:51,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742138598] [2019-11-24 00:35:51,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 00:35:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:35:51,821 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 00:35:51,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742138598] [2019-11-24 00:35:51,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704808548] [2019-11-24 00:35:51,822 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 00:35:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:35:51,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-24 00:35:51,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 00:35:51,993 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:51,994 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-24 00:35:51,995 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:52,038 INFO L567 ElimStorePlain]: treesize reduction 10, result has 86.1 percent of original size [2019-11-24 00:35:52,045 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-24 00:35:52,046 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2019-11-24 00:35:52,047 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:52,070 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:52,076 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-24 00:35:52,077 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2019-11-24 00:35:52,078 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:52,092 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:52,093 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-24 00:35:52,093 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:32 [2019-11-24 00:35:52,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:35:52,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:35:52,171 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:35:52,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:35:52,196 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:35:52,201 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:35:52,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:35:52,227 INFO L392 ElimStorePlain]: Different costs {1=[v_prenex_4], 3=[|v_#valid_26|]} [2019-11-24 00:35:52,242 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:35:52,242 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:52,253 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:35:52,253 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:52,263 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:35:52,264 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:52,273 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:35:52,273 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:52,962 WARN L192 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2019-11-24 00:35:52,964 INFO L567 ElimStorePlain]: treesize reduction 32, result has 91.2 percent of original size [2019-11-24 00:35:53,023 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:53,023 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 166 [2019-11-24 00:35:53,027 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:53,060 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-24 00:35:53,066 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:53,067 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 170 [2019-11-24 00:35:53,069 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:53,312 WARN L192 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2019-11-24 00:35:53,313 INFO L567 ElimStorePlain]: treesize reduction 157, result has 50.0 percent of original size [2019-11-24 00:35:53,319 INFO L392 ElimStorePlain]: Different costs {0=[|v_#memory_int_60|, |#memory_$Pointer$.offset|, |v_#memory_$Pointer$.base_50|, v_prenex_3, |v_#memory_int_62|, |v_#memory_$Pointer$.offset_50|, v_prenex_5, v_prenex_6], 1=[|v_#memory_int_61|], 3=[|v_#memory_$Pointer$.base_48|, |v_#memory_$Pointer$.offset_48|], 4=[v_prenex_1, v_prenex_2]} [2019-11-24 00:35:53,349 INFO L496 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:53,424 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:53,429 INFO L496 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:53,465 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:53,472 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2019-11-24 00:35:53,473 INFO L496 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:53,500 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:53,501 INFO L464 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2019-11-24 00:35:53,512 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2019-11-24 00:35:53,513 INFO L496 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:53,537 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:53,543 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-11-24 00:35:53,544 INFO L496 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:53,561 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:53,562 INFO L464 ElimStorePlain]: Eliminatee v_prenex_5 vanished before elimination [2019-11-24 00:35:53,562 INFO L464 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2019-11-24 00:35:53,565 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2019-11-24 00:35:53,566 INFO L496 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:53,581 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:53,588 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2019-11-24 00:35:53,589 INFO L496 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:53,616 INFO L567 ElimStorePlain]: treesize reduction 4, result has 87.9 percent of original size [2019-11-24 00:35:53,619 INFO L377 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 7 treesize of output 3 [2019-11-24 00:35:53,619 INFO L496 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:53,627 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:53,627 INFO L464 ElimStorePlain]: Eliminatee v_prenex_1 vanished before elimination [2019-11-24 00:35:53,627 INFO L464 ElimStorePlain]: Eliminatee v_prenex_2 vanished before elimination [2019-11-24 00:35:53,628 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 13 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-24 00:35:53,628 INFO L221 ElimStorePlain]: Needed 15 recursive calls to eliminate 16 variables, input treesize:935, output treesize:23 [2019-11-24 00:35:53,651 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:53,651 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2019-11-24 00:35:53,652 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:53,666 INFO L567 ElimStorePlain]: treesize reduction 4, result has 69.2 percent of original size [2019-11-24 00:35:53,667 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-24 00:35:53,667 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:4 [2019-11-24 00:35:53,671 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 00:35:53,671 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 00:35:53,679 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:35:53,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:35:53,686 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 00:35:53,708 INFO L392 ElimStorePlain]: Different costs {0=[|v_#memory_int_60|, v_prenex_10, |v_#memory_$Pointer$.offset_52|, |#memory_int|], 2=[v_prenex_8, |v_#memory_int_61|, |v_#memory_$Pointer$.base_53|], 6=[v_prenex_9, v_prenex_7], 14=[|v_#memory_$Pointer$.base_48|, |v_#memory_$Pointer$.offset_48|]} [2019-11-24 00:35:53,722 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:54,228 WARN L192 SmtUtils]: Spent 505.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-11-24 00:35:54,229 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:54,239 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:54,248 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:54,670 WARN L192 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-11-24 00:35:54,674 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:54,690 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:55,011 WARN L192 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2019-11-24 00:35:55,011 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:55,039 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-24 00:35:55,052 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:55,052 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 119 [2019-11-24 00:35:55,053 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:55,247 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-11-24 00:35:55,248 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:55,255 INFO L496 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-24 00:35:55,262 INFO L496 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-24 00:35:55,426 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2019-11-24 00:35:55,427 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:55,442 INFO L377 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 119 treesize of output 113 [2019-11-24 00:35:55,443 INFO L496 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-11-24 00:35:55,583 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2019-11-24 00:35:55,585 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:55,595 INFO L496 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-24 00:35:55,685 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:55,690 INFO L496 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-24 00:35:55,696 INFO L496 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-24 00:35:55,768 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:55,774 INFO L496 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-24 00:35:55,789 INFO L496 ElimStorePlain]: Start of recursive call 14: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-24 00:35:55,861 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:55,867 INFO L496 ElimStorePlain]: Start of recursive call 15: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-24 00:35:55,926 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:55,931 INFO L496 ElimStorePlain]: Start of recursive call 16: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-24 00:35:55,978 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:35:55,980 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 11 dim-2 vars, End of recursive call: 10 dim-0 vars, and 3 xjuncts. [2019-11-24 00:35:55,980 INFO L221 ElimStorePlain]: Needed 16 recursive calls to eliminate 12 variables, input treesize:454, output treesize:238 [2019-11-24 00:35:56,180 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 00:35:56,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [533707174] [2019-11-24 00:35:56,202 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-24 00:35:56,202 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 00:35:56,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 00:35:56,213 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 00:35:56,214 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 00:35:56,462 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:35:56,942 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:35:57,039 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:35:57,049 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:35:57,322 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:35:57,459 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:35:57,940 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:35:58,067 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:35:58,170 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 00:35:58,718 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 00:35:59,080 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2019-11-24 00:36:00,027 WARN L192 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 94 [2019-11-24 00:36:00,393 WARN L192 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 75 [2019-11-24 00:36:00,823 WARN L192 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 89 [2019-11-24 00:36:00,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 00:36:00,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5, 5] total 16 [2019-11-24 00:36:00,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913177833] [2019-11-24 00:36:00,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-24 00:36:00,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 00:36:00,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-24 00:36:00,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2019-11-24 00:36:00,828 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 8 states. [2019-11-24 00:36:01,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 00:36:01,142 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-11-24 00:36:01,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-24 00:36:01,145 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-24 00:36:01,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 00:36:01,146 INFO L225 Difference]: With dead ends: 44 [2019-11-24 00:36:01,146 INFO L226 Difference]: Without dead ends: 42 [2019-11-24 00:36:01,148 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2019-11-24 00:36:01,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-24 00:36:01,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-11-24 00:36:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-24 00:36:01,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-11-24 00:36:01,156 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 14 [2019-11-24 00:36:01,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 00:36:01,156 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-11-24 00:36:01,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-24 00:36:01,156 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-11-24 00:36:01,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 00:36:01,157 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 00:36:01,157 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 00:36:01,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 00:36:01,361 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 00:36:01,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 00:36:01,362 INFO L82 PathProgramCache]: Analyzing trace with hash -2068224288, now seen corresponding path program 1 times [2019-11-24 00:36:01,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 00:36:01,363 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889157777] [2019-11-24 00:36:01,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 00:36:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:36:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 00:36:01,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889157777] [2019-11-24 00:36:01,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743373858] [2019-11-24 00:36:01,448 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 00:36:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:36:01,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-24 00:36:01,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 00:36:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 00:36:01,545 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 00:36:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 00:36:01,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [660719938] [2019-11-24 00:36:01,555 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-24 00:36:01,557 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 00:36:01,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 00:36:01,558 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 00:36:01,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 00:36:12,140 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2019-11-24 00:36:26,677 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2019-11-24 00:36:27,114 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2019-11-24 00:36:43,455 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2019-11-24 00:36:58,268 WARN L192 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2019-11-24 00:37:01,465 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2019-11-24 00:37:07,282 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2019-11-24 00:37:07,772 WARN L192 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 1423 DAG size of output: 690 [2019-11-24 00:37:17,921 WARN L192 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 330 DAG size of output: 290