java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/avg05-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 12:59:11,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 12:59:11,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 12:59:11,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 12:59:11,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 12:59:11,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 12:59:11,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 12:59:11,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 12:59:11,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 12:59:11,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 12:59:11,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 12:59:11,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 12:59:11,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 12:59:11,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 12:59:11,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 12:59:11,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 12:59:11,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 12:59:11,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 12:59:11,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 12:59:11,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 12:59:11,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 12:59:11,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 12:59:11,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 12:59:11,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 12:59:11,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 12:59:11,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 12:59:11,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 12:59:11,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 12:59:11,941 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-20 12:59:11,957 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 12:59:11,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 12:59:11,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 12:59:11,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 12:59:11,959 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 12:59:11,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 12:59:11,959 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 12:59:11,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 12:59:11,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 12:59:11,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 12:59:11,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 12:59:11,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 12:59:11,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 12:59:11,961 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 12:59:11,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 12:59:11,961 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 12:59:11,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 12:59:11,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 12:59:11,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 12:59:11,962 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 12:59:11,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 12:59:11,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:59:11,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 12:59:11,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 12:59:11,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 12:59:11,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 12:59:11,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 12:59:11,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 12:59:11,964 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 12:59:11,993 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 12:59:12,008 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 12:59:12,012 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 12:59:12,013 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 12:59:12,013 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 12:59:12,014 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg05-1.i [2019-09-20 12:59:12,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4b5354a3/a0cfa74d12544d07ab05a2081eee6678/FLAG897f932c8 [2019-09-20 12:59:12,520 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 12:59:12,520 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg05-1.i [2019-09-20 12:59:12,526 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4b5354a3/a0cfa74d12544d07ab05a2081eee6678/FLAG897f932c8 [2019-09-20 12:59:12,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4b5354a3/a0cfa74d12544d07ab05a2081eee6678 [2019-09-20 12:59:12,919 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 12:59:12,921 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 12:59:12,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 12:59:12,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 12:59:12,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 12:59:12,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:59:12" (1/1) ... [2019-09-20 12:59:12,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49cf23f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:12, skipping insertion in model container [2019-09-20 12:59:12,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:59:12" (1/1) ... [2019-09-20 12:59:12,938 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 12:59:12,959 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 12:59:13,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:59:13,187 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 12:59:13,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:59:13,221 INFO L192 MainTranslator]: Completed translation [2019-09-20 12:59:13,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13 WrapperNode [2019-09-20 12:59:13,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 12:59:13,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 12:59:13,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 12:59:13,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 12:59:13,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13" (1/1) ... [2019-09-20 12:59:13,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13" (1/1) ... [2019-09-20 12:59:13,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13" (1/1) ... [2019-09-20 12:59:13,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13" (1/1) ... [2019-09-20 12:59:13,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13" (1/1) ... [2019-09-20 12:59:13,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13" (1/1) ... [2019-09-20 12:59:13,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13" (1/1) ... [2019-09-20 12:59:13,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 12:59:13,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 12:59:13,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 12:59:13,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 12:59:13,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13" (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 [2019-09-20 12:59:13,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 12:59:13,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 12:59:13,419 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2019-09-20 12:59:13,419 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 12:59:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 12:59:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 12:59:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2019-09-20 12:59:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 12:59:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 12:59:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 12:59:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 12:59:13,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 12:59:13,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 12:59:13,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 12:59:13,715 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 12:59:13,716 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-20 12:59:13,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:59:13 BoogieIcfgContainer [2019-09-20 12:59:13,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 12:59:13,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 12:59:13,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 12:59:13,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 12:59:13,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:59:12" (1/3) ... [2019-09-20 12:59:13,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537583e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:59:13, skipping insertion in model container [2019-09-20 12:59:13,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13" (2/3) ... [2019-09-20 12:59:13,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537583e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:59:13, skipping insertion in model container [2019-09-20 12:59:13,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:59:13" (3/3) ... [2019-09-20 12:59:13,743 INFO L109 eAbstractionObserver]: Analyzing ICFG avg05-1.i [2019-09-20 12:59:13,755 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 12:59:13,764 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 12:59:13,779 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 12:59:13,809 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 12:59:13,810 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 12:59:13,810 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 12:59:13,810 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 12:59:13,810 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 12:59:13,810 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 12:59:13,810 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 12:59:13,811 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 12:59:13,811 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 12:59:13,830 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-09-20 12:59:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-20 12:59:13,837 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:13,838 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:13,840 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:13,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:13,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1283808693, now seen corresponding path program 1 times [2019-09-20 12:59:13,846 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:13,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:13,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:13,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:13,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-20 12:59:14,028 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:14,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 12:59:14,032 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 12:59:14,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 12:59:14,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 12:59:14,049 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2019-09-20 12:59:14,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:14,077 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-09-20 12:59:14,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 12:59:14,078 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-09-20 12:59:14,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:14,088 INFO L225 Difference]: With dead ends: 54 [2019-09-20 12:59:14,088 INFO L226 Difference]: Without dead ends: 26 [2019-09-20 12:59:14,092 INFO L636 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 [2019-09-20 12:59:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-20 12:59:14,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-09-20 12:59:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-20 12:59:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-09-20 12:59:14,136 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-09-20 12:59:14,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:14,137 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-09-20 12:59:14,137 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 12:59:14,137 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-09-20 12:59:14,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-20 12:59:14,140 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:14,140 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:14,141 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:14,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:14,141 INFO L82 PathProgramCache]: Analyzing trace with hash 721846027, now seen corresponding path program 1 times [2019-09-20 12:59:14,141 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:14,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:14,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:14,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:14,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-20 12:59:14,222 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:14,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 12:59:14,224 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 12:59:14,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 12:59:14,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:59:14,227 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-09-20 12:59:14,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:14,273 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-09-20 12:59:14,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 12:59:14,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-09-20 12:59:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:14,276 INFO L225 Difference]: With dead ends: 46 [2019-09-20 12:59:14,276 INFO L226 Difference]: Without dead ends: 28 [2019-09-20 12:59:14,278 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:59:14,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-20 12:59:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-09-20 12:59:14,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-20 12:59:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-20 12:59:14,300 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-09-20 12:59:14,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:14,301 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-20 12:59:14,301 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 12:59:14,301 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-20 12:59:14,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-20 12:59:14,303 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:14,303 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:14,303 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:14,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:14,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1487444845, now seen corresponding path program 1 times [2019-09-20 12:59:14,304 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:14,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:14,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:14,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:14,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:14,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-20 12:59:14,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:14,396 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:14,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:14,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-09-20 12:59:14,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-20 12:59:14,545 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:59:14,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-09-20 12:59:14,546 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 12:59:14,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 12:59:14,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-20 12:59:14,547 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 4 states. [2019-09-20 12:59:14,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:14,589 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-09-20 12:59:14,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 12:59:14,589 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-09-20 12:59:14,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:14,591 INFO L225 Difference]: With dead ends: 46 [2019-09-20 12:59:14,591 INFO L226 Difference]: Without dead ends: 29 [2019-09-20 12:59:14,592 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-20 12:59:14,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-20 12:59:14,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-09-20 12:59:14,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-20 12:59:14,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-09-20 12:59:14,604 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-09-20 12:59:14,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:14,604 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-09-20 12:59:14,604 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 12:59:14,605 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-09-20 12:59:14,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-20 12:59:14,606 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:14,606 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:14,607 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:14,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:14,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2063023467, now seen corresponding path program 1 times [2019-09-20 12:59:14,607 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:14,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:14,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:14,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:14,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-20 12:59:14,703 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:14,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 12:59:14,704 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 12:59:14,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 12:59:14,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:59:14,705 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-09-20 12:59:14,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:14,727 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-09-20 12:59:14,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 12:59:14,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-09-20 12:59:14,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:14,732 INFO L225 Difference]: With dead ends: 43 [2019-09-20 12:59:14,732 INFO L226 Difference]: Without dead ends: 30 [2019-09-20 12:59:14,733 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:59:14,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-20 12:59:14,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-09-20 12:59:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-20 12:59:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-09-20 12:59:14,740 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-09-20 12:59:14,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:14,742 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-09-20 12:59:14,742 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 12:59:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-09-20 12:59:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-20 12:59:14,744 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:14,744 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:14,744 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:14,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:14,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1550668567, now seen corresponding path program 1 times [2019-09-20 12:59:14,745 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:14,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:14,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:14,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:14,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-20 12:59:14,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:14,892 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:59:14,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:14,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-20 12:59:14,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 12:59:14,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:14,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-20 12:59:14,990 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 12:59:14,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 12:59:14,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:59:14,991 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2019-09-20 12:59:15,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:15,017 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2019-09-20 12:59:15,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 12:59:15,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-09-20 12:59:15,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:15,019 INFO L225 Difference]: With dead ends: 52 [2019-09-20 12:59:15,019 INFO L226 Difference]: Without dead ends: 32 [2019-09-20 12:59:15,020 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:59:15,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-20 12:59:15,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-09-20 12:59:15,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-20 12:59:15,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-09-20 12:59:15,026 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 42 [2019-09-20 12:59:15,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:15,027 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-09-20 12:59:15,027 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 12:59:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-09-20 12:59:15,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-20 12:59:15,044 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:15,044 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:15,044 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:15,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:15,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1311885621, now seen corresponding path program 2 times [2019-09-20 12:59:15,045 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:15,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:15,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:15,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:15,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-20 12:59:15,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:15,121 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:15,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 12:59:15,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:59:15,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:15,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-20 12:59:15,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-20 12:59:15,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:15,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-20 12:59:15,220 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 12:59:15,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 12:59:15,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:59:15,221 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2019-09-20 12:59:15,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:15,256 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-09-20 12:59:15,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:59:15,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-09-20 12:59:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:15,257 INFO L225 Difference]: With dead ends: 54 [2019-09-20 12:59:15,257 INFO L226 Difference]: Without dead ends: 34 [2019-09-20 12:59:15,258 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:59:15,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-20 12:59:15,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-09-20 12:59:15,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-20 12:59:15,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-09-20 12:59:15,264 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 44 [2019-09-20 12:59:15,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:15,264 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-09-20 12:59:15,264 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 12:59:15,264 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-09-20 12:59:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-20 12:59:15,265 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:15,266 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:15,266 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:15,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:15,266 INFO L82 PathProgramCache]: Analyzing trace with hash 525258797, now seen corresponding path program 3 times [2019-09-20 12:59:15,266 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:15,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:15,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:15,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:15,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-20 12:59:15,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:15,341 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:15,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 12:59:15,393 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-20 12:59:15,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:15,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-20 12:59:15,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-09-20 12:59:15,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:15,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-09-20 12:59:15,421 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 12:59:15,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 12:59:15,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:59:15,422 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2019-09-20 12:59:15,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:15,464 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2019-09-20 12:59:15,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 12:59:15,467 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2019-09-20 12:59:15,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:15,468 INFO L225 Difference]: With dead ends: 59 [2019-09-20 12:59:15,468 INFO L226 Difference]: Without dead ends: 39 [2019-09-20 12:59:15,468 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:59:15,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-20 12:59:15,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-09-20 12:59:15,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-20 12:59:15,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-09-20 12:59:15,474 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 46 [2019-09-20 12:59:15,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:15,474 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-09-20 12:59:15,475 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 12:59:15,475 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-09-20 12:59:15,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-20 12:59:15,476 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:15,476 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:15,476 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:15,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:15,477 INFO L82 PathProgramCache]: Analyzing trace with hash -174499699, now seen corresponding path program 4 times [2019-09-20 12:59:15,477 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:15,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:15,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:15,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:15,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-09-20 12:59:15,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:15,560 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:15,586 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-20 12:59:15,616 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-20 12:59:15,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:15,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-20 12:59:15,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-09-20 12:59:15,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:15,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-09-20 12:59:15,658 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-20 12:59:15,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-20 12:59:15,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-20 12:59:15,658 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 10 states. [2019-09-20 12:59:15,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:15,738 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2019-09-20 12:59:15,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-20 12:59:15,738 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2019-09-20 12:59:15,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:15,739 INFO L225 Difference]: With dead ends: 64 [2019-09-20 12:59:15,739 INFO L226 Difference]: Without dead ends: 42 [2019-09-20 12:59:15,740 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-20 12:59:15,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-20 12:59:15,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-09-20 12:59:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-20 12:59:15,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-09-20 12:59:15,746 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 54 [2019-09-20 12:59:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:15,746 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-09-20 12:59:15,746 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-20 12:59:15,746 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-09-20 12:59:15,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-09-20 12:59:15,747 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:15,748 INFO L407 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:15,748 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:15,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:15,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1668458771, now seen corresponding path program 5 times [2019-09-20 12:59:15,749 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:15,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:15,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:15,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:15,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-09-20 12:59:15,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:15,889 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:59:15,915 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:15,984 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-09-20 12:59:15,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:15,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-20 12:59:16,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 52 proven. 9 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-09-20 12:59:16,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:16,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-20 12:59:16,042 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:59:16,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:59:16,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:59:16,043 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 7 states. [2019-09-20 12:59:16,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:16,074 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2019-09-20 12:59:16,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 12:59:16,079 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2019-09-20 12:59:16,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:16,080 INFO L225 Difference]: With dead ends: 67 [2019-09-20 12:59:16,081 INFO L226 Difference]: Without dead ends: 44 [2019-09-20 12:59:16,083 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:59:16,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-20 12:59:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-09-20 12:59:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-20 12:59:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-09-20 12:59:16,090 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 62 [2019-09-20 12:59:16,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:16,090 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-09-20 12:59:16,090 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:59:16,091 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-09-20 12:59:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-20 12:59:16,094 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:16,095 INFO L407 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:16,095 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:16,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:16,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1321158677, now seen corresponding path program 6 times [2019-09-20 12:59:16,097 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:16,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:16,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:16,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:16,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-09-20 12:59:16,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:16,225 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:16,251 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-20 12:59:16,298 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-09-20 12:59:16,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:16,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-20 12:59:16,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-09-20 12:59:16,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:16,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-09-20 12:59:16,356 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-20 12:59:16,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-20 12:59:16,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-09-20 12:59:16,356 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 9 states. [2019-09-20 12:59:16,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:16,416 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2019-09-20 12:59:16,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-20 12:59:16,417 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2019-09-20 12:59:16,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:16,418 INFO L225 Difference]: With dead ends: 73 [2019-09-20 12:59:16,418 INFO L226 Difference]: Without dead ends: 48 [2019-09-20 12:59:16,419 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-09-20 12:59:16,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-20 12:59:16,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-09-20 12:59:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-20 12:59:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-09-20 12:59:16,429 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 68 [2019-09-20 12:59:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:16,429 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-09-20 12:59:16,429 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-20 12:59:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-09-20 12:59:16,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-20 12:59:16,435 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:16,435 INFO L407 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:16,436 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:16,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1461291623, now seen corresponding path program 7 times [2019-09-20 12:59:16,436 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:16,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:16,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:16,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:16,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2019-09-20 12:59:16,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:16,559 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:59:16,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:16,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-20 12:59:16,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 130 proven. 4 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-09-20 12:59:16,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:16,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-20 12:59:16,712 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 12:59:16,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 12:59:16,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:59:16,713 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 6 states. [2019-09-20 12:59:16,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:16,740 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2019-09-20 12:59:16,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:59:16,741 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2019-09-20 12:59:16,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:16,742 INFO L225 Difference]: With dead ends: 71 [2019-09-20 12:59:16,742 INFO L226 Difference]: Without dead ends: 50 [2019-09-20 12:59:16,743 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:59:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-20 12:59:16,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-09-20 12:59:16,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-20 12:59:16,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-09-20 12:59:16,748 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 76 [2019-09-20 12:59:16,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:16,749 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-09-20 12:59:16,749 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 12:59:16,749 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-09-20 12:59:16,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-09-20 12:59:16,750 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:16,750 INFO L407 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:16,750 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:16,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:16,751 INFO L82 PathProgramCache]: Analyzing trace with hash 2023844581, now seen corresponding path program 8 times [2019-09-20 12:59:16,751 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:16,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:16,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:16,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:16,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2019-09-20 12:59:16,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:16,830 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:16,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 12:59:16,908 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:59:16,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:16,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-20 12:59:16,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 130 proven. 9 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-09-20 12:59:16,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:16,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-20 12:59:16,960 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:59:16,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:59:16,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:59:16,961 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 7 states. [2019-09-20 12:59:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:16,990 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2019-09-20 12:59:16,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 12:59:16,993 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 78 [2019-09-20 12:59:16,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:16,994 INFO L225 Difference]: With dead ends: 72 [2019-09-20 12:59:16,994 INFO L226 Difference]: Without dead ends: 51 [2019-09-20 12:59:16,997 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:59:16,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-20 12:59:17,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-20 12:59:17,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-20 12:59:17,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-09-20 12:59:17,005 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 78 [2019-09-20 12:59:17,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:17,006 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-09-20 12:59:17,006 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:59:17,006 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-09-20 12:59:17,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-20 12:59:17,012 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:17,012 INFO L407 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:17,013 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:17,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:17,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1471357923, now seen corresponding path program 9 times [2019-09-20 12:59:17,014 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:17,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:17,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:17,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:17,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:44,442 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2019-09-20 12:59:46,151 WARN L191 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 30